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Plug Valve, 2-Way, Straight (Treated)

Parker

...Plug Valve, 2-Way, Straight...

Plug Valve

Swagelok Shutoff Gas Valve

...Plug Valve ... Supplies & Accessories , Labware , Valves ... a filter between these valves and the instrument. The filter will capture any potential volatile components released from the lubricant used in the valve....

Plug Valve

Parker Balston Shutoff Gas Valve

...Plug Valve ... Supplies & Accessories , Labware , Valves ... a filter between these valves and the instrument. The filter will capture any potential volatile components released from the lubricant used in the valve....

Sample Cylinder 316 SS End Pipe Plug

...Sample Cylinder 316 SS End Pipe Plug ... Sample Handling , Gas Sampling , Sample Cylinder Valves & Accessories...

Sample Cylinder 316 SS Hollow Hex Plug

...Sample Cylinder 316 SS Hollow Hex Plug ... Sample Handling , Gas Sampling , Sample Cylinder Valves & Accessories...

Valves

for ASE 100/200/300 Systems

...Valves...

Versa Vial Plugs (12 mm)

...Versa Vial Plugs...

8 mm Starburst Plugs

for Shell Vials, 1.0 mL WISP 96 Style, 8 x 40 mm

...8 mm Starburst Plugs...

Valves for HPLC

...Valves for HPLC ... Supplies & Accessories , HPLC Accessories , Valves ... Our valves have low internal volumes and are rated to 15,000 psi (103,421 kPa). They feature...

Ball Valve

Swagelok Shutoff Gas Valve

...Ball Valve ... Supplies & Accessories , Labware , Valves...

Toggle Valve

Swagelok Shutoff Gas Valve

...Toggle Valve ... Supplies & Accessories , Labware , Valves...

Ball Valve

Parker Balston Shutoff Gas Valve

...Ball Valve ... Supplies & Accessories , Labware , Valves...

Toggle Valve

Parker Balston Shutoff Gas Valve

...Toggle Valve ... Supplies & Accessories , Labware , Valves...

Raw Polyurethane Foam (PUF) Plugs

... PUF plugs for both low-volume and high-volume sampling. Flame retardant free ... Raw Polyurethane Foam (PUF) Plugs ... Unwashed PUF plugs for both low-volume and high-volume sampling. Flame...

Injector/Detector Plug Nuts

...Injector/Detector Plug Nuts...

PEEK Plug for Bottle Top Adapters

...PEEK Plug for Bottle Top Adapters...

Preventive Maintenance Kit

...; valve disk; TFE ball plug; TFE seat; ruby ball; inlet tube body assembly manifold insert; insert seal ); solvent reservoir 10 µm filters (4); sapphire plungers (2); reference valve button; valve disk spacer ... filters (4); sapphire plungers (2); reference valve button; valve disk spacer; valve disk; TFE ball plug...

Replacement RAVEn Diaphragm Valves

For Entech air sampling canisters

... air canisters; replace TOV and TOV-2 valves without modification! Proven long life —durable design is engineered to exceed 15,000 cycles; identical internal design to RAVE valves for Restek ... Replacement RAVEn Diaphragm Valves ... RAVE valves are standard on our full line ... air canisters; replace TOV and TOV-2 valves without modification! Proven long life —durable design is engineered to exceed 15,000 cycles; identical internal design to RAVE valves for Restek...

Sample Cylinder Valves (Stainless Steel & Sulfinert Treated)

... Multiple valve configurations, including dip tube and rupture disks. Large : –40 °C to 120 °C 303 stainless steel. Alta-Robbins' unique valve design ... Sample Cylinder Valves ... Sample Handling , Gas Sampling , Sample Cylinder Valves & Accessories ... Multiple valve configurations, including dip tube and rupture disks. Large...

Replacement RAVE Diaphragm Valves

For Restek air sampling canisters

... to exceed 15,000 cycles. Leak-free performance—every valve operation—easily finger-turn to achieve full valve closure (only 10 in ... Replacement RAVE Diaphragm Valves ... RAVE valves are standard on our full line ... to exceed 15,000 cycles. Leak-free performance—every valve —easily finger-turn to achieve full valve closure (only 10 in-lb). Enhanced damage...

Metering Gas Valves

Swagelok

...Metering Gas Valves ... Supplies & Accessories , Labware , Valves...

Metering Gas Valves

Parker Balston

...Metering Gas Valves ... Supplies & Accessories , Labware , Valves...

Gas Sampling Valves (Sulfinert Treated)

1/16" Fittings, 0.40 mm Port Diameter; “W Type” Valve

....Sulfinert treatment eliminates active sites in the valve or loop for better recovery of active compounds. ... Gas Sampling Valves ... Sample Handling , Air Sampling , Valves & Loops...

3-Way Ball Valve

Swagelok Shutoff Gas Valve

...3-Way Ball Valve ... Supplies & Accessories , Labware , Valves...

Metering Control Valves (Stainless Steel & Sulfinert Treated)

...Metering Control Valves ... Sample Handling , Gas Sampling , Sample Cylinder Valves & Accessories...

Luer Lock Valve Adaptors

...Luer Lock Valve Adaptors ... Use a luer lock valve adaptor to connect a luer lock fitting to a Rheodyne or Valco valve....

Cylinder Valve Wrench

...Cylinder Valve Wrench ... This specially designed wrench enables easy opening of cylinder valves that are fitted...

ValvTool Wrench

...ValvTool Wrench ... The ValvTool is a time-saving device that provides easy access to many hard-to-reach Rheodyne or Valco valves. For 1/4" nuts....

Inlet Check Valves

for Shimadzu HPLC Systems

...Inlet Check Valves...

Outlet Check Valves

for Shimadzu HPLC Systems

...Outlet Check Valves...

Inlet Check Valve Assembly

for Waters HPLC Systems

...Inlet Check Valve Assembly...

Outlet Check Valve Assembly

for Waters HPLC Systems

...Outlet Check Valve Assembly...

Outlet Check Valve Housing

for Waters HPLC Systems

...Outlet Check Valve Housing...

Check Valve Cartridges

for Waters HPLC Systems

...Check Valve Cartridges...

Reference Valve Rebuild Kit

for Waters HPLC Systems

...Reference Valve Rebuild Kit...

Outlet Ball Valve

for Agilent HPLC Systems

...Outlet Ball Valve...

Sieves for Outlet Valve

for Agilent HPLC Systems

...Sieves for Outlet Valve...

Inlet Check Valve Assembly

for Thermo HPLC Systems

...Inlet Check Valve Assembly...

Outlet Check Valve Assembly

for Thermo HPLC Systems

...Outlet Check Valve Assembly...

Check Valve and Transducer Assembly

for Thermo HPLC Systems

...Check Valve and Transducer Assembly...

Inlet Check Valve

for PerkinElmer HPLC Systems

...Inlet Check Valve...

Outlet Check Valve

for PerkinElmer HPLC Systems

...Outlet Check Valve...

Prime/Purge Valve Repair Kit for Prime/Purge Valve

...Prime/Purge Valve Repair Kit for Prime/Purge Valve ... Supplies & Accessories , HPLC Accessories , Valves...

Replacement Rotors for Gas Sampling Valves

...Replacement Rotors for Gas Sampling Valves ... Sample Handling , Air Sampling , Valves & Loops...

Mininert Precision Sampling Valves for Vials

...Mininert Precision Sampling Valves for Vials ... Mininert valves are very convenient for repetitive sampling and limit content exposure to the silicon septum. Models are available for screw-cap and crimp-top vials. The crimp-top valve for 13 mm ID...

Opti-Max Check Valves

... metering. An improperly functioning check valve can lead to a noisy baseline, pressure fluctuations, and inconsistent flow. Restek is pleased to offer the Opti-Max check valve system from Optimize ... Opti-Max Check Valves...

Ashcroft Gauge Connector to Canister Valve

...Ashcroft Gauge Connector to Canister Valve...

Ball Valve, 2-Way, Straight (Treated)

Parker

...Ball Valve, 2-Way, Straight...

Outlet Check Valve Rebuild Kit

for Shimadzu HPLC Systems

...Outlet Check Valve Rebuild Kit...

Outlet Check Valve Rebuild Kit

for Waters HPLC Systems

...Outlet Check Valve Rebuild Kit...

Outlet Ball Valve, Binary Pump

for Agilent HPLC Systems

...Outlet Ball Valve, Binary Pump...

Universal 10-32 PEEK Column Connectors and Plugs

...Universal 10-32 PEEK Column Connectors and Plugs...

Replacement Swagelok SS4H Bellows Valve

.... Unique serial number on each valve for complete traceability. Withstands temperatures of up ! Replacement 1/4" Swagelok SS4H bellows-sealed valves are available on Silco ... Replacement Swagelok SS4H Bellows Valve ... Supplies & Accessories , Labware , Valves ... . Unique serial number on each valve for complete traceability. Withstands temperatures of up...

Vernier Knob for Parker Balston Metering Gas Valves

...Vernier Knob for Parker Balston Metering Gas Valves ... Supplies & Accessories , Labware , Valves...

Vernier Knob for Swagelok Metering Gas Valves

...Vernier Knob for Swagelok Metering Gas Valves ... Supplies & Accessories , Labware , Valves...

PerformancePLUS Check Valve Cartridge

for Waters HPLC Systems

...PerformancePLUS Check Valve Cartridge...

PerformancePLUS Check Valve Housing

for Waters HPLC Systems

...PerformancePLUS Check Valve Housing...

Replacement Septum for Gas Sampling Bags with Polypropylene Valves

...Replacement Septum for Gas Sampling Bags with Polypropylene Valves...

SilcoCan Air Sampling Canisters with RAVE Valve

Ideal for low-level reactive sulfur (520 ppb), TO-14A, or TO-15 compounds

... Siltek-treated canister with optional Siltek-treated valve offers unsurpassed , 2/3-turn valve with stainless steel diaphragms prevent sample adsorption for more-accurate results ... SilcoCan Air Sampling Canisters with RAVE Valve ... of the new RAVE valve—learn more. ... Siltek-treated canister with optional Siltek-treated valve offers unsurpassed , 2/3-turn valve with stainless steel diaphragms prevent sample adsorption for more-accurate results...

TO-Can Air Sampling Canisters with RAVE Valve

Optimized for Methods TO-14A, TO-15, IP-1A, ASTM D5466, OSHA PV 2120, and NJ DEP Low Level TO-15

...-quality, metal-to-metal seal, 2/3-turn valve with stainless steel diaphragms prevents sample adsorption for more accurate results. Both 2-port and 3-port valves available; 3-port valve includes -30 ... TO-Can Air Sampling Canisters with RAVE Valve ... of the new RAVE valve—learn more. ... -quality, metal-to-metal seal, 2/3-turn valve with stainless steel diaphragms prevents sample adsorption for more accurate results. Both 2-port and 3-port valves available; 3-port valve includes -30...

Gas-Tight Syringes with Shut-off Valves (SGE)

Syringe Fitted with Luer Lock Valve*

... Ideal for sample storage and transportation. Push-pull shut-off valve ... Gas-Tight Syringes with Shut-off Valves ... Ideal for sample storage and transportation. Push-pull shut-off valve. ...

Gas-Tight Syringes with Shut-off Valves (SGE)

Syringe Fitted with Removable Needle and Valve

...Gas-Tight Syringes with Shut-off Valves ... Ideal for sample storage and transportation. Push-pull shut-off valve. ...

Replacement Parts & Accessories for Mininert Precision Sampling Valves for Vials

...Replacement Parts & Accessories for Mininert Precision Sampling Valves for Vials...

Replacement Needles for Gas-Tight Syringes with Shut-off Valves (SGE)

Model V Syringe Valve: fits any SGE removable needle syringe, 25 µL–2.5 mL

...Replacement Needles for Gas-Tight Syringes with Shut-off Valves...

Thermolite Plus Septa

..., Diameter, Shimadzu Plug, ... Thermolite Plus Septa, Shimadzu Plug, 50-pk. ... Shimadzu Plug...

Thermolite Plus Septa

..., Diameter, Shimadzu Plug, ... Thermolite Plus Septa, Shimadzu Plug, 100-pk. ... Shimadzu Plug...

Thermolite Septa

..., Diameter, Shimadzu Plug, ... Septa, Thermolite, Shimadzu Plug, 50-pk. ... Shimadzu Plug...

Plug

...Parker Fitting, 1/16" Plug, Stainless Steel, 2-pk....

TO-Can Air Sampling Canisters with Swagelok SS4H Bellows Valve

... quality, Bellows-design valve. Now also available with new RAVE valve. U the handle and base to the canister without welds and protects the canister, tube stub, and valve. Each ... TO-Can Air Sampling Canisters with Swagelok SS4H Bellows Valve ... Now also available with new RAVE valve. ... quality, Bellows-design valve. ...

Syringe Needles

... Material, metal, Vendor Cat. #, 039895, Used with, For Rheodyne/Valco valves., ... For Rheodyne/Valco valves....

Valves

...Valves for Resprep 12 or 24-port SPE manifolds, 2-pk....

Male Quick Coupling

..., Vendor Cat. #, 2A-Q4VN, Includes, self-sealing shutoff valve, ... self-sealing shutoff valve...

Female Quick Coupling

..., Vendor Cat. #, 4A-Q4CN, Includes, self-sealing shutoff valve, ... self-sealing shutoff valve...

Male Quick Coupling

..., Vendor Cat. #, SS-QC4-D-200, Includes, self-sealing shutoff valve, ... self-sealing shutoff valve...

Female Quick Coupling

..., Material, Stainless Steel, Vendor Cat. #, SS-QC4-B-200, Includes, self-sealing shutoff valve, ... self-sealing shutoff valve...

Resources

ChromaBLOGraphy: What is the difference between a Ball, Toggle, and Plug Valve?

Lately we (technical service) have had multiple calls asking the question “What is the difference between a Ball, Toggle, and Plug Valve?”   The first call I took actually caught me off guard because this has not been a common question.  My answer went something like this “For two-handed operation, I prefer the ball valve and […]

Air Canister Heating Jacket Instruction Sheet (PDF)

..., including the valve, is heated during the cleaning cycle, to remove contaminants most effectively. It also the maximum temperature of your valve and gauge to assure this temperature is not exceeded. Installation...

Protocol Station Installation and Operation Instructions (PDF)

..., the plug may be removed for the addition of a diaphragm valve for purging or for the installation closed (clockwise) d. Remove the cylinder valve plug, if any. e. Inspect the cylinder valve and threads...

Methane Cylinder Kit Instruction Sheet (PDF)

...Methane Cylinder Kit cat.# 20197, 20199 1. Remove the allen nut from the cylinder valve outlet . (Make sure the valve is turned off prior to unscrewing the nut.) 2. Tighten the gauge to the top port...

ChromaBLOGraphy: A Simple Tip for Quicker Searching

One of the questions that Restek’s Technical Service Group is asked frequently is “how do I find ____ on your website?” The Restek website contains tens of thousands of products and supporting resources. In the past, my colleagues have written posts on using our online search function and how to use our searchable chromatogram database. […]

SilcoCan Canisters Instruction Sheet (PDF)

... from its box. Remove the ¼-inch plug nut from the top of the valve. 2. Turn the knob to the open to the canister without welds, and it protects the canister, tube stub, and valve. The diaphragm valve has a metal...

TO-Can Canisters Instruction Sheet (PDF)

... pressure! 1. Unpack the TO-Can canister from its box. Remove the ¼-inch plug nut from the top of the valve stub, and valve. The diaphragm valve has a metal-to-metal seat and a temperature limit of 250°C. We...

Gas Management for GC Labs (PDF)

... 23200 23201 Ball Valve, 3-Way 23219 23220 23217 23218 Plug Valve 23146 23147 23202 23203 Note: Restek strongly recommends using a filter between plug valves and the instrument. The filter will capture any...

Regulators: Installation and Operation Instructions (PDF)

... the cylinder valve is tightly closed (clockwise). d. Remove the cylinder valve plug, if any. e. Inspect to problems such as a release of gas through the relief valve or regulator diaphragm. Proper safety measures...

Super Clean Gas Filter Kit for LC Use Instruction Sheet (PDF)

... with the two valves and positioning pin. Closure Plugs 2.5 Position the Filter on the Baseplate Universal test. • The white, small, plastic mounting plugs on the outside housing should never be removed...

Critical Purity 526 Series Automatic Switchover System Installation and Operation Instructions (PDF)

... closed (clockwise) d. Remove the cylinder valve plug, if any. e. Inspect the cylinder valve and threads may be purchased with open ports, diaphragm valves, manifold con nec tors, or fl exible pigtails...

Critical Purity 527 Series Automatic Switchover System Installation and Operation Instructions (PDF)

... valve is tightly closed (clockwise) d. Remove the cylinder valve plug, if any. e. Inspect the cylinder with open ports, diaphragm valves, manifold connectors, or fl exible pigtails. The system, when confi gured...

Super Clean Gas Filter Kit Instruction Sheet (PDF)

... with the baseplate, making sure all three holes align with the two valves and positioning pin. Closure Plugs 2 , plastic mounting plugs on the outside housing should never be removed; if these plugs are missing...

Super Clean Click-On Big Trap Instruction Sheet (PDF)

... Connector Push here. For new installation: Flush the inlet connector by pushing down the needle valve will automatically block the gas stream. Remove the blue closing plug from the inlet of the trap. For gas...

Grace Chromatography Consumables Cross Reference

Are you looking for an alternate source for chromatography products similar to those you once ordered from W. R. Grace? Restek has you covered with a...

Molecular Sieve 5A and 13X: Packed GC Columns for Permanent Gas Separations (PDF)

... stainless steel tubing. Silcosteel treated, braided wire end plug keeps packing intact, even under intense pressure surges during valve switching. Molesieve 5A Molesieve 5A Molesieve 13X Molesieve 13X Mesh 80...

Soil Gas Sampler Instruction Sheet (PDF)

.../4” compression sample inlet. 4. 1/4” port connector to canister valve. The 1/4" compression inlet and outlet allows easy connection to the canister valve and also to the tubing from the sample port. Several orifice...

ChromaBLOGraphy: Looking for a Cryogenic Valve for your Shimadzu GC-MS?

I was working on a project for volatile sulfur analysis. It took so long to cool the GC oven to 30 °C, and yet the most volatile analytes were still difficult to separate. At that time, I realized that I needed a cryogenic cooling system for my Shimadzu GC-MS QP2010 plus! However, I was not as excited as […]

ChromaBLOGraphy: Leak Checking Your GC: Leak Detector or Pressure Decay?

There are a variety of techniques for making sure your GC system is leak tight. Senior Technical Service Specialist Tom Bloom discusses different approaches for leak checking using leak detectors or a pressure decay test 1. Scott Grossman’s article, “How Much Sensitivity is Needed in a Leak Detector?” demonstrates the sensitivity of the Restek Leak Detector […]

Vacuum/Pressure Station Operating Manual (PDF)

....S. and in other countries. SAFETY PRECAUTIONS DANGER:Improper use of grounding plug can result in a risk identified valves and the easy-to-read compound function gauge eliminates the need for an elaborate plumbing...

Micropacked Columns Instruction Sheet (PDF)

... tailing. To prevent any loss of packing due to rapid pressurization or depressurization, an end plug and valves, or other chromatographic-grade connectors. Ferrule seals should not be attempted directly...

New D3606 Column Set Outperforms TCEP Columns for Benzene Analysis

...ASTM D3606, ASTM method d3606, ethanol, benzene, wasson, gasoline, refinery gas, process, valve...

Use Wool Sparingly

A one-centimeter plug of loosely bound wool is sufficient for most applications. Consult your GC instruction manual for recommendations on wool packing placement...

TO-Clean Manual (PDF)

... check all connections, lines, and valves before operating the TO-Clean. Always turn off the flammable .................................................................................. 9 Vacuum Valve Assembly...

Restek's Vacuum Bag Sampler Instruction Sheet (PDF)

... trip the automatic shutoff switch located in the lid of the sampler. A special vacuum limiting valve and valve fittingReplacement Battery 22119Universal Battery Charger 22120RULES FOR SAFE OPERATION 1. Do...

Pack In a Box: Dual Piston Pump Operator's Manual (PDF)

... in check valvevalve.4.Bad check5.Plugged inlet filter.4.Clean or replace check valves.Seevalve.Section 5 .6.2Packaging for Shipping3. 3.1Front Panel Controls and Indicators3.1.1Prime/Purge Valve3.1.2Filter/Outlet3...

Solutions for Gas Sampling (PDF)

...Expansive Line of Solutions for Gas Sampling • Wide range of new cylinders and valves . • Metering control valve reduces pressure to GC injector Sample Cylinders • All cylinders have 1/4" female...

ChromaBLOGraphy: Where should the wool plug be positioned in my liner?

The simple answer is “wherever it works best”. However, I realize that is not a helpful answer if you either don’t have the time to experiment, or have tried several different packed liners without much success.   Please keep in mind that this is one of those questions which really does not have a right [...]

Optimizing the Analysis of Volatile Organic Compounds (PDF)

... for wastewater samples because the sample might foam or the frit might become plugged. 10 Valves The purge 9 Valves 10 Adsorbent Materials and Traps 10 Adsorbent Materials 11 Choosing the Right Trap for Your...

Click-On Inline Super Clean Purifier Instruction Sheet (PDF)

... the gas line for 2 min with pure carrier gas; advised pressure: 90 psi. 5. Remove the blue closing plugs by pushing back the needle valve on the Click-On connector. NOTE: SHARP EDGE!! Advised pressure: 90 psi. 8...

ChromaBLOGraphy: [20] What do Chromatograms tell us? Spikes on the eluting Peak and on the Base line

Chromatograms are like fingerprints.  If you can “read” chromatograms well, you often can find a plausible cause. In this series, we will show a series of GC-chromatograms that are obtained from users and discuss some potential causes for the phenomena. Then we can move into some solutions for improvement.       Sometimes chromatogram is [...]

ChromaBLOGraphy: Setting Purge Valve Time for Splitless Injection

Properly setting the purge valve time for a splitless injection is important to maximize transfer of components with low volatility, while minimizing solvent introduction that can produce a long, tailing peak that might interfere with the determination of compounds of interest. Generally speaking, a purge valve time should be approximately 1.5 to 2 times the [...]

Screw Cap Combo Valve Instruction Sheet (PDF)

...OPERATING INSTRUCTIONS Screw Cap Combo Valve TO CONNECT TUBING: Push 3/16” ID fluoropolymer . Vinyl or Silicone tubing is not recommended, due to leachables. TO OPEN VALVE: Turn cap counter...

Single Stainless Steel Push/Pull Valve with Optional Stainless Steel Septum Fitting (PDF)

...OPERATING INSTRUCTIONS TO OPEN VALVE: Push stem down (in) toward the bag. The valve is now OPEN (Figure 1). Bags are supplied with the stem in the CLOSED (up) position. TO CLOSE VALVE: Pull stem...

ChromaBLOGraphy: Time to weigh in on canister weight.

Customer feedback, whether it is positive or negative, is always greatly appreciated. With that said… I have recently received customer input that Restek canisters are “too heavy” or “much heavier than the competition”, etc… My hands and arms were telling me this was not so; however, I set out to obtain some objective data. I [...]

Using Micropacked GC Columns for Analyzing Volatiles in Light Hydrocarbon Streams

...®-treated, braided-wire end plugs keep packing intact, even under intense pressure surges during valve...

Assure Accurate Sampling and Reliable Sample Purity Restek Sampling System Treatments Prevent Adsorption, Protect Components

.../8". Valves The sample flow path through a valve can prolong contact between the sample stream and the valve components. Restek surface treatments have been applied to many valve geometries, to eliminate ... . Treatments can be applied to cylinders, valves, fittings, tubing and more, and demonstrably improve detection...

ChromaBLOGraphy: A Tip for those that are tired of connecting I-Phone/Pad or USB the wrong Way. Use of “Chromato – Graphy” in a different way

Do you recognize this problem? When you plug in the cable of your I-phone or any USB, you always put the plug the “wrong” way? I have it all the time. There is a 50% chance you do this the “wrong” way. There is a small sign on the plugs, but it is not easy [...]

News: Add the Performance of Restek’s RAVE Valves to Your Entech Air Cans

Restek Air Valve Excellence (RAVE) is now available for the easy retrofit of 3.2 L, 6 L, and 15 L Entech air sampling canisters. These new RAVEn valves have an identical internal design to the incredibly popular and rugged RAVE … Continue reading

ChromaBLOGraphy: This RAVE won’t keep you up until the wee hours of the morning…

Our new air canister valve (RAVE™) won’t keep you up until the crack of dawn, because you can sleep peacefully knowing the following information (also available in the following video for those non-readers): Our valve is 100% stainless steel. This includes all of the wetted surfaces, which for the record have no moving parts. What does […]

Restek LC Columns and Accessories (PDF)

... meets and often exceeds the original instrument manufacturer’s performance. For seals, valves, lamps...

News: Introduce Your Sampling Canisters to Restek® Air Valve Excellence (RAVE™)

The new RAVE™ valve brings proven long life, leak-free performance, and effortless operation to your air sampling canisters. This durable design has been engineered to exceed 15,000 cycles—and every valve is leak-tested with helium to 1×10-6 mL/sec before it leaves … Continue reading

ChromaBLOGraphy: Manual HPLC Valves, what we have and how they work

If you are looking for some manually activated valves to use with your HPLC system, we just might have what you are looking for. For a listing of these products, from our website, click here. For each of these, the flowpath is controlled manually via knobs on their exterior. We’ll briefly discuss some commonly used […]

ChromaBLOGraphy: Setting the splitless injection purge valve time in gas chromatography

In splitless injection GC we set the purge valve time to sweep the inlet liner of excess solvent so that it doesn’t “tail out” through the whole chromatogram.  But what time do we set?  A good “rule of thumb” is to sweep the inlet liner 1.5 to 2 times with carrier gas prior to turning on […]

Guide to Whole Air Canister Sampling (PDF)

... during sampling. In extreme cases, particles could plug the flow path and stop the sample flow . Particles also can affect the leak integrity of the valve, and possibly cause damage to the valve. Two...

Restek's PLOT Column Family (PDF)

... the contamination of valves, injectors, and GC detectors. Detectors contaminated with particles typically generate flow can be obstructed by particle buildup. Particles can also affect valves by becoming lodged...

EZGC Calculators and Chromatogram Modeler for GC Method Development

Speed up and simplify your GC method development with Restek's EZGC online suite, featuring our GC flow calculator, GC method translator, and GC chro...

RAVE and RAVEn Diaphragm Valves Rebuild Kit Instruction Sheet (PDF)

...RAVE and RAVEn Diaphragm Valves Rebuild Kit cat.# 26389 and 26390 Caution: Only experienced personnel should attempt to rebuild valves. Valves can be irreparably damaged if replacement parts...

Why 5cm syringe needles for capillary GC?

... originates from the syringe (assumption of a pressure-regulation/needle valve system, Fig. 1). At higher regulator/needle valve system: the sample should expand from the column entrance backwards...

ChromaBLOGraphy: Calculating Splitless Valve Time for Splitless Injection GC with the New EZGC Method Translator and Flow Calculator – Pesticides

Properly setting the splitless valve time (SVT) for splitless injection in gas chromatography (GC) is probably one of the most overlooked optimization parameters for pesticide analysis today.  Having too short of a SVT leads to poor transfer of active and involatile pesticides, especially as the liner becomes contaminated with “dirt” from injected sample extracts.  This […]

ChromaBLOGraphy: Troubleshooting GC Syringe Issues – Part 2

In an earlier post titled Troubleshooting GC Syringe Issues, I discussed several things to try if sticking plungers are the problem.  In this post, I’ll discuss what to do if the syringe is not pulling up the sample properly (or at all). . So what can cause a syringe to have problems pulling up a […]

ChromaBLOGraphy: Easy Maintenance and Changing of Columns in MS and vacuum GC using a 4-port Valve

To set up a GC-MS detection system, it always takes considerable time to stabilize the system once the vacuum is applied. This pumping down and stabilization can take from several hours to some days to a night,  before a decent calibration is possible and the instrument is in good shape to run the methods. If [...]

Ball & Seat Inlet Check Valve Rebuild Kit Instruction Sheet (PDF)

...Ball & Seat Inlet Check Valve Rebuild Kit cat.# 25362 Ball & Seat Inlet Check Valve Rebuild Procedure Follow these steps to rebuild your Ball & Seat Inlet Check Valve: 1. Remove the inlet check valve...

News: Keep Your LC Running Smoothly with New Accessories from Restek

Simplify maintenance with the latest LC accessories from Restek. Reusable EXP2 HPLC/UHPLC fittings allow repeated 20,000+ psi seals to be easily made without wrenches. The patented titanium/PEEK ferrule provides zero-dead-volume connections without compromising high-pressure seals. Their compact design makes them … Continue reading

Mininert Precision Sampling Vial Valves Instruction Sheet (PDF)

...Mininert Precision Sampling Vial Valves cat.# 24900, 24901, 24902, 24903, 24904, 24905 Mininert valves are “on/off” valves that are very convenient for repetitive sampling and will limit sample...

ChromaBLOGraphy: Setting Your Splitless Injector Temperature

In a previous post, I noted that optimizing splitless injection purge valve time was important to maximize transfer of low volatility components, and I used the pesticide, Deltamethrin, as an example. Splitless injector temperature can be optimized similarly, but remember that because a splitless injection occurs over a longer time (the valve time was 80 [...]

ChromaBLOGraphy: What are these O-rings for that I received with my baseplate trap?

Some of you have noticed that included with several of our baseplate traps are a package of two small O-rings. Technical Service has been informed that these are the O-rings which fit onto the check valves on your baseplate (see red arrows below).  Does this mean that you need to replace these O-rings?  Not necessarily.  […]

Outlet Check Valve Rebuild Kit Instruction Sheet (PDF)

...Outlet Check Valve Rebuild Kit cat.# 25368 Outlet Check Valve Rebuild Procedure Follow these steps to rebuild your Outlet Check Valve: 1. Remove the outlet check valve from the pump head. 2. Disassemble...

ChromaBLOGraphy: GC columns – when one is not enough

Often we get asked for a column recommendation for a complex GC analysis.   This is especially true for gas analysis.  Probably the most common request is for separation of fixed (permanent) gases (like O2, N2, CO, CO2, N2O, etc…) plus separation of larger (higher-boiling point) compounds (light hydrocarbons, moisture, sulfur compounds, etc.).  Unfortunately, there is […]

Actuator Outlet Check Valve Rebuild Kit Instruction Sheet (PDF)

...Actuator Outlet Check Valve Rebuild Kit cat.# 25365 Actuator Outlet Check Valve Rebuild Procedure Follow these steps to rebuild your Actuator Outlet Check Valve: 1. Remove the actuator outlet check valve...

Rt-XLSulfur Packed GC Column for Analysis of Low-Level Sulfur Compounds in C1-C6 Hydrocarbon Streams (PDF)

... overlooked with packed columns is that their end plugs are known to adsorb sulfur compounds. For that reason , Restek also treated the end plugs in the Rt-XLSulfur column with Sulfinert passivation. The extra care...

Restek Gas Management System Instruction Sheet (PDF)

... management system. Place the toggle valve in the “open” position. 5. Let the system purge for approximately 5 to add the supplied adaptors to the RGMS. 2. Remove the nuts and plugs from the 1/8-inch fittings (A & E...

Operating Hints for Using Split/Splitless Injectors (PDF)

... gas through the injection port. The position of a switching valve in the injection port determines are controlled by the position of the 3-way solenoid valve. In the split injection mode, the flow path is always...

PLOT Columns Instruction Sheet (PDF)

... zones.2.Once all zones ofthe GC are cooled,turn offall gases.Removethe installed column,plug each end .53 mm ID columns).•To ensure protection against particles flushing back into a valve/flow switch...

Genuine Restek Replacement Parts Catalog for Shimadzu GCs (PDF)

... and remove wool plugs easily. Order a spare pack so you’ll always have one available. Inlet Liner Packing depth. Place a plug of loosely bound wool at the top of the inlet liner. Insert the liner packing...

ChromaBLOGraphy: Contamination and Troubleshooting: “Jack, did that really happen?”

I had to blog on this because this just happened again to my colleague Jack last week! Occasionally, a loose spring will make it into a limited volume insert. If overlooked, sample is loaded into this insert. As the spring soaks in the sample, a significant background signal can result. The green chromatogram trace shows [...]

ChromaBLOGraphy: Maximum temperatures of packed columns – Porous Polymers

We often get asked about the maximum temperature limit of our packed columns, so I decided to write a post series which will provide this information for the majority of the packed columns which we sell.  I thought I would start with the least complicated packed columns, those whose packings are typically not coated with a […]

Sulfinert Gas Sampling Valves Instruction Sheet (PDF)

...Sulfinert Gas Sampling Valves (cat.#s 20584, 20585, 20586) Operating Instructions These gas sampling valves have been Sulfinert coated by Restek. The Sulfinert coating will provide the most inert...

Restek Essentials: Featured Chromatography Products 2018.1 (PDF)

... LC Running Smoothly with Opti-Max Check Valves Exceptional performance and reliability with super . 26153 Get yours at www.restek.com/sample-handling 3 Extend the Life of Your RAVE and RAVEn Valves...

Vials Sales Sheet (PDF)

...™, Polypropylene, 12 x 32 mm *Eliminates needle damage to plug. Versa Vial™ Plugs (12 mm) 2.0 mL Versa Vials Plug Material 100-pk. 1,000-pk. Versa Vial Plug Green Polyethylene 22713 22714 Versa Vial Plug Grey...

RAVE Valves for Restek and RAVEn Valves for Entech Air Sampling Canisters (PDF)

...RAVE Valves for Restek and RAVEn Valves for Entech Air Sampling Canisters www . • Leak-free performance—every valve is helium leak-tested to 1x10-6 mL/sec. • Effortless operation...

ChromaBLOGraphy: What does a Particle Trap do?

PLOT columns are coated with adsorbents which is usually deposited as a layer of particles. A particle trap is a 2-2.5 m piece of f.s. tubing coated with 0.5 um of Rtx-1 phase. If a particle is released from the surface, it will be ‘caught” by the particle trap, so it does not enter the [...]

CarboFrit Inlet Liner Packing Instruction Sheet (PDF)

...CarboFrit Inlet Liner Packing (cat.# 20294, 20295) CarboFrit plugs are specifically designed to be slightly larger in OD than the 4mm ID of glass liners. This allows the CarboFrit plug to conform to the ID...

News: Accurately Determine Mineral Oil Hydrocarbons in Food Using Restek’s New MOSH/MOAH Reference Standard

According to the German Federal Institute for Risk Assessment (BfR), mineral oil hydrocarbons (MOHs) may damage the liver, heart valves, and lymph nodes. Because the structure of some mineral oil hydrocarbons resembles that of PAHs, they may also be carcinogenic/mutagenic. … Continue reading

Opti-Max Check Valves Instruction Sheet (PDF)

...Opti-Max check valves Change your check valve cartridges less often and more easily. Restek is pleased to offer Opti-Max check valves from Optimize Technologies for maximum performance and ease...

ChromaBLOGraphy: Maximum temperatures of packed columns – Liquid Phases

For my second post in this series, I would like to focus on liquid phases.  As you know, for packed columns, a liquid phase needs a solid support.  Combined, these are what makes the “packing”.  In most cases, it is the liquid phase which limits the packed column’s maximum temperature, and not the solid support. […]

Rupture Disk Replacement Instruction Sheet (PDF)

... the valve body. Discard the disk and the washer. 2. Holding the disk so that the color code is visible the holder from the valve body. 4. Install the holder, tightening it according to Table I. Thread...

ChromaBLOGraphy: Increasing PAH Sensitivity by Large Volume Splitless Injection – No Injector Modification Necessary!

Magni and Porzano did Concurrent Solvent Recondensation Large Sample Volume (CSR-LV) Splitless Injection with a special low dead-volume injector, and a modified septum head and septum purge valve, to get repeatable linear results for injections up to 35µL. In addition to hardware modifications, their CSR-LV included fast injection with liquid band formation into a liner [...]

SilcoCan Canister with RAVE Valve Instruction Sheet (PDF)

...SilcoCan Canister with RAVE Valve cat.# 27400, 27401, 27402, 27403, 27404, 27405, 27406, 27407 , and valve. The diaphragm valve has a metal-to-metal seat and a temperature limit of 140 °C. Each canister...

ChromaBLOGraphy: My GC capillary column was not sealed when I received it!

Traditionally, GC capillary column manufacturers have used several different methods to seal their products while in transit and storage. These sealing options include septa, silicone plugs, flame sealing, and press-fit caps.   I’m not going to discuss the advantages and disadvantages of these various approaches in this post. However, what I would like to address […]

TO-Can Canister with RAVE Valve Instruction Sheet (PDF)

...TO-Can Canister with RAVE Valve cat.# 27416, 27417, 27418, 27419, 27420, 27421, 27422, 27423 welds, and it protects the canister, tube stub, and valve. The diaphragm valve has a metal-to-metal seat...

ChromaBLOGraphy: Conferee Networking Session on Food Analysis at PittCon

Today Neil Mosesman and I participated in the PittCon 2010 networking session, Contemporary Food and Environmental Analysis, facilitated by John Mathis of Global Laboratory Services, Inc. John adroitly introduced the topic via slides and then led discussion on challenges faced by analytical chemists, including multiresidue sample preparation methods (e.g. QuEChERS), target/unknown compound instrumental approaches, benefits [...]

ChromaBLOGraphy: What can I use as a cap for my mobile phase bottles?

Our choices for mobile phase bottle tops are based primarily on two different products. The first product is the Hub-Cap Bottle Top, catalog #26541. This is designed to fit a 4-Liter solvent bottle. :     The body (also called insert) of the Hub-Cap Top is cap is made of inert PTFE and has three […]

Tubing Assembly for ASE 200 Systems Instruction Sheet (PDF)

... into either static or pressure relief valves. This simplifies installation and removes a potential source or pressure relief valve. The adaptor is not needed when using Restek’s tubing assembly for ASE 200...

ChromaBLOGraphy: How should I store my GC column?

GC Column Storage We (tech service) often get asked about storage conditions of our GC columns. We thought the BLOG may be a good venue to revisit this topic. To simplify this information, it may be best to provide three different time-frames:   1) Overnight: Our recommendation if using a column daily is to leave [...]

Rt®-XLSulfur Packed GC Column for Analysis of Low-Level Sulfur Compounds in C1-C6 Hydrocarbon Streams

... that is routinely overlooked with packed columns is that their end plugs are known to adsorb sulfur compounds . For that reason, Restek also treated the end plugs in the Rt®-XLSulfur column with Sulfinert...

Veriflo SC423XL Flow Controller Instruction Sheet (PDF)

... of the sampling equipment. After cleaning, if the critical orifice is still too plugged or contaminated and orifice and frit replacement cat.# 550131 Canister Repair Includes valve replacement, leak test...

Installing Ashcroft Gauges on Canisters Using Stainless Steel Connectors (PDF)

... the valve and tighten ¼ turn past finger-tight. 4.Wrap three layers of PTFE tape around the threads ready to open the valve and take vacuum and pressure readings. #500-09-001 Rev. date: 03/12 Restek...

ChromaBLOGraphy: Splitless injections of dirty samples on a single taper with wool liner result in quick degradation of its performance, especially for involatile polycyclic aromatic hydrocarbons

Introduction:  Even if you set your splitless purge valve time properly, it’s inevitable in many environmental sample analysis situations that your GC inlet liner, especially its wool packing (if used), will become contaminated with nonvolatile “dirt” and need changing.  The effects of this dirt on performance for a liner are seen in the chart and […]

Solutions for Your Petro Analyses (PDF)

... continuous valve cycling. • Stable up to 300 °C for fast regeneration following exposure to water or carbon to cat.# when ordering. See chart on next page. **The column set is designed to accommodate both valve...

Frequently Asked Questions: GC Accessories

...), and a Shimadzu plug septum. For a 1/4" NPT outlet, use male connector cat .   Point Style 3, LC: square/blunt needle tip. For use with HPLC injection valves and for sample...

ChromaBLOGraphy: My Merlin Microseal Septum seems to be leaking!

In a previous post (see Merlin Microseal or Septa… should they really “SEAL”?) the topic of leaking with the Merlin Microseal was discussed. We recently had a customer use a Restek Leak Detector to test for helium at the top of a Merlin Microseal and this sensitive device did indeed detect helium coming from the [...]

Frequently Asked Questions: Air Sampling

... Siltek-treated gas sample loops or valves? What kind of fittings with RAVE valves 569604 valve replacement, leak testing, and cleaning...

A Technical Guide for Static Headspace Analysis Using GC (PDF)

... stream without additional moving parts other than a valve and a needle. The balanced-pressure system with a carrier gas (Figure 8, Step 2). After the vial is pressurized and equilibrium has been reached, the valve...

Genuine Restek Replacement Parts Catalog for Thermo Scientific GCs (PDF)

... rst when troubleshooting. Mini Wool Puller/Inserter Insert and remove wool plugs easily. Order on the side of the tool and adjust the gauge to the manufacturer’s recommended depth. Place a plug...

Nutech 2701 Air Sampling Timer Operation Manual (PDF)

... (max. 12 timed events) ——Auto Sampling Started ——Valve Open ——Valve Closed ——Sampling Time Length the event number, the Open will start flashing for you to set the valve function. Push [Enter] to confirm...

ChromaBLOGraphy: Injection Techniques used in GC: Names and What are we actually doing with each Technique?

  When traveling around I experience a lot of confusion on the naming of Injection techniques in Gas Chromatography.  The challenge can be the “mode” settings of the GC. Often the GC does not use the same name as what the actual technique is what we are using.       Split injection The sample is […]

ChromaBLOGraphy: When High Boilers Disappear (GC)

Were you ever trying to analyze high boiling point compounds (using GC) when they either disappeared, or their response severely decreased, while at the same time compound response for lower boiling point compounds looked fine? Well, it has happened to most of us at one time or another. Below I will provide several common reasons [...]

Sulfinert-Treated Sample Cylinders Assembly & Maintenance Guidelines (PDF)

...4-500 22113 316L-50DF4-500-PD 22113-PI Assembling the Sample Cylinder and Valve We recommend using a new valve with your new cylinder. If a valve has been used previously, the threads might...

Analog Signal Cable (Agilent 5890 GC to Strip Chart) Instruction Sheet (PDF)

.... The plug is not polarized—insert into 5890 socket in either direction. #203-03 [008] Rev. date: 01...

Enviro

YOUR GUIDE FOR Environmental Sampling and Analysis

Restek Airmail, 2012 vol. 1 (PDF)

...-in-one septum and valve fi tting make these lightweight and easy to use. • Polypropylene or stainless steel valve. • Both valves conveniently connect to 3⁄16" ID tubing. Polypropylene Valve Stainless Steel...

ChromaBLOGraphy: Large volume splitless injection WITHOUT a PTV!

Recently while trying to create backflash in an Agilent splitless injector, I noted linear compound responses as I injected up to 25µL for PAHs from naphthalene to benzo(ghi)perylene! I went to the literature (note to self: start with the literature) and found papers from Magni and Porzano, and Grob’s group, where they termed the technique [...]

ChromaBLOGraphy: Optimizing the performance of your D3606 column set

. My previous post “Simple tips to help your D3606 column set last longer” provided several recommendations for maximizing the lifetime of this column set.  In this post, I will provide suggestions to help you reproduce the results of the QA test chromatogram which was included with your column set. . 1.  Thoroughly review the […]

ChromaBLOGraphy: Troubleshooting HPLC- Loss in Response for All Analytes

[1]Troubleshooting HPLC- Loss in Response for all Analytes Just as in GC applications, patterns in your HPLC chromatography can exhibit telltale signs that point toward probable sources of error.  In this brief series of posts, we will look at possible scenarios that you may encounter in the laboratory and how you might approach resolving those […]

ChromaBLOGraphy: The Impact of a Dirty Marijuana Extract on Pesticide Recoveries from a Splitless GC Inlet

In a previous post I told you about our experimentation with marijuana (that didn’t sound right…) and pesticide extraction via QuEChERS.  An important part of that work was cartridge solid phase extraction (cSPE) cleanup with 500mg CarboPrep 90 / 500 mg PSA cartridges.  To minimize losses of planar pesticides (e.g hexachlorobenzene), which we know can [...]

Resprep 6-Port Disk Manifold Lid Instruction Sheet (PDF)

.... Components • 1 polypropylene lid with 6 ports installed • 6 nylon valves • 6 PTFE needle guides • 4 black . Remove the yellow protective insert from the port. 2. Insert the male luer end of the shut-off valve...

ChromaBLOGraphy: 0.53mm wide bore MXT Metal MicroPacked Columns do Gases and Fit in any Standard GC

I always have been working on PLOT columns to make them retentive and highly efficient. Great was my surprise what you can do with adsorption materials when they are correctly packed into a 0.53mm MXT capillary.. Separation of volatiles can be well done using adsorption chromatography. Using high retentive adsorbents, unique separations can be done [...]

Resprep 12- & 24-Port Manifolds Instruction Sheet (PDF)

... Valves: 1. Attach the four black legs to the manifold lid. 2. Ensure that the white plastic lid gasket on the underside of the manifold lid (Figure 2). 4. Insert the flow control valves (stopcocks) into the female...

Genuine Restek Replacement Parts Catalog for Bruker/Varian GCs (PDF)

... rst when troubleshooting. Mini Wool Puller/Inserter Insert and remove wool plugs easily. Order to the manufacturer’s recommended depth. Place a plug of loosely bound wool at the top of the inlet liner...

A Primer on Control Systems

... type of valve. The control variable is the component of the controller that determines the extent of the valve. The way that a control variable is manipulated is determined by the control method...

ChromaBLOGraphy: Packed Column information for the beginner

We seem to be getting more calls from first time users of packed columns, so I decided to write this post for these beginners to help them understand the terminology commonly used when describing these products.   What is a packed column? Unlike GC capillary columns, which are referred to as WCOT (Wall Coated Open […]

Genuine Restek Replacement Parts Catalog for PerkinElmer GCs (PDF)

... rst when troubleshooting. Mini Wool Puller/Inserter Insert and remove wool plugs easily. Order to the manufacturer’s recommended depth. Place a plug of loosely bound wool at the top of the inlet liner...

Installing Sampling Kits onto 3 Liter Canisters Instruction Sheet (PDF)

.... Screw the connector nut on the valve inlet threads, then tighten ¼ turn past finger-tight. 4. Slide...

Inlet Supplies for Shimadzu GCs With Split/Splitless Inlet (PDF)

... (usable to 350 °C inlet temp.) Shimadzu Plug 23872 23873 Premium Non-stick BTO Septa (usable to 400 °C inlet temp.) Shimadzu Plug 27098 27099 Description Max. Temp. Similar to Shimadzu Part # qty. cat...

ChromaBLOGraphy: What is Different about Prep LC? (Versus Analytical HPLC)

  The goal of prep LC is not to produce the best looking chromatogram. Prep LC can be used to purify a material for manufacturing or research purposes, or it can also be used for sample cleanup prior to analytical measurement, such as in gel permeation chromatography. Most Restek customers are more involved with using […]

New Thermolite Plus and BTO Septa from Restek (PDF)

..., 9.5 mm, 10 mm and Shimadzu plug.) • 5 mm septa are partially predrilled for improved puncturability Guide 27094 27095 17 mm CenterGuide 27096 27097 Shimadzu Plug 27098 27099 • Usable to 400 °C inlet...

ChromaBLOGraphy: Do reverse phase HPLC columns really need conditioning?

  Well, it’s partly a matter of semantics sometimes, but there is usually nothing drastic that you need to do to get your HPLC column going if it is new.  There is no baking at high temperatures involved like you might do for GC or that sort of thing. You do, however, need to equilibrate […]

ChromaBLOGraphy: Blogging about rough pumps is a ballast!!!

In my previous blog we learned that the oil in a rotary vane rough pump acts as a sink for compounds in the vapor stream you are vacuuming. This ties in nicely with my most recent blog in which we learned that the color of your rough pump oil is not always a reliable indicator [...]

ChromaBLOGraphy: What do Chromatograms tell us? Peak Shape: Splitted or Broadened peak for first eluting Compound(s)

Chromatograms are like fingerprints.  If you can “read” chromatograms well, you often can find a plausible cause. In this series, we will show a series of chromatograms that are obtained from users and discuss some potential causes for the phenomena. Then we can move into some solutions for improvement.   Sometimes chromatograms look like Fig. [...]

ChromaBLOGraphy: TO-15 Canister Relative Humidity: Part I (Introduction)

From time- to-time I receive inquiries on how to humidify a TO-15 canister blank and/or standard. See… Method TO-15 clearly states the use of humidified zero air several times throughout the document. For example: “10.7.3 Procedure. Fill a cleaned and evacuated canister with humidified zero air (RH >20 percent, at 25 °C). Pressurize the contents [...]

ChromaBLOGraphy: Restek’s EZGC Online Suite that includes the Method Translator and Flow Calculator, and a Chromatogram Modeler, wins a TASIA Award – Chris Nelson, One of the Suite Builders

The Analytical Scientist is a very smartly produced scientific magazine full of interesting articles, including many on chromatography.  I’ve had the pleasure of working with two of the minds behind this publication, Rich Whitworth and Frank van Geel, on a TAS GCxGC contribution, and have been impressed with the volume of quality work they’ve put […]

Restek Low Volume Injector (LVI) for Agilent 5890 Septum Packed Purge Ports Instruction Sheet (PDF)

.... Remove the packed purge weldment, liner, and seal from the injector. septum nut plug septum 1 /16-inch not overtighten the nut as tubing bore may become restricted.) 4. Install a septum plug (cat.# 27153) and screw...

Canister Grab Sampling Kit Instruction Sheet (PDF)

... canisters,for qualitative grab air sampling.•1/4"compression fitting connects directly to canister valve inlet.•Replaceable frit protects orifice and valve from particulates.•Sample inlet design minimizes...

Restek Liquid Chromatography (LC) Columns - Usage & Care (PDF)

... columns are shipped with PEEK end plugs; simply loosen and remove the plugs before installation. Please could cause a precipitate to form and plug the column. Flow Direction & Flow Rate The arrows...

Pittcon 2017

Learn more about what we'll be doing at Pittcon 2017.

A Guide to Preparing and Analyzing Chlorinated Pesticides (PDF)

... are the plugging of the disk or tube with suspended solids and the breakthrough of targeted organics; therefore port with solvents using a syringe or HPLC pump. Do not flush solvent through any actuator valves...

Guide to Preparing and Analyzing Semivolatile Organic Compounds (PDF)

... depending on the manufacturer. One of the biggest problems with SPE is plugging of the disk or tube optimized. Splitless injection requires an injection system that is equipped with a solenoid valve...

News: New! Rt®-Silica BOND Columns

Restek’s Rt®-Silica BOND columns are robust, versatile, selective PLOT columns that offer excellent performance for the analysis of light hydrocarbons, sulfur gases, and halocarbons above ambient temperature. In addition, carbon dioxide and other gases can be retained at ambient temperature … Continue reading

News: Speed Up and Simplify GC Method Development With Restek’s EZGC® Online Suite

Whether you are developing a new GC method or looking to reliably optimize an application, Restek’s EZGC® method development tools will save you hours of calculations, guesswork, and trial-and-error. These free, web-based applications are easily accessible by visiting www.restek.com/ezgc — … Continue reading

News: Cut GC Method Development and Optimization Time with EZGC Web Tools: Software Solutions to Hard Problems

Free Separation Science Webinar Presenter: Jonathan Keim, Restek Date: December 5, 2017 Time: 8 a.m. PST / 11 a.m. EST / 4 p.m. GMT / 5 p.m. CET A recorded, on-demand version will be available to everyone who registers for … Continue reading

Step Up to Rocker and Chemker Vacuum Pumps from Restek (PDF)

... on/off switch; 1 moisture trap with drain valve; 1 air filter [air outlet]; 2 rubber valve plates; 1 with drain valve; 2 air filters [air outlets]; 4 rubber valve plates; 1 Prote filter cartridge [overflow...

Analyzing Oxygenates in Gasoline Using TCEP and Rtx-1/MXT-1 Columns (PDF)

... or MXT-1). These columns are configured with a 10-port valve to accomplish the heartcutting volatile hydrocarbons are vented. The valve is then actuated, backflushing the remaining sample to the Rtx...

ChromaBLOGraphy: Electronic Cigarettes Part III: We’re gonna vape on the EZGC bandwagon.

The title says it all… we’re taking our e-cig method and jumping on the EZGC Method Translator and Flow Calculator bandwagon. Why… well because all the cool kids are doing it. No seriously… to simply reiterate how easy it is to use the Method Translator. In fact, the EZGC Method Translator makes life so easy […]

ChromaBLOGraphy: How to Increase the Life Time of your GC Columns? Part II: Reducing Impact of the Matrix

Column lifetime is a function of pollution.  Pollution is a function of the amount injected on to the column. The more matrix we inject, the sooner we have to clean liners and  columns.  One way is to use more and better sample preparation, to reduce the matrix impacts. The cost for this is time, which [...]

Restek Liquid Chromatography (LC) Columns — Cleaning Recommendations

... LC Column Storage To avoid contamination, store LC columns with end plugs...

D3606 Application Column Instruction Sheet (PDF)

... to the injector.The inlet ofColumn 2 must beconnected to the switching valve.2.To obtain optimal oxygenate peak to the switching valve using the manufac-turer-recommended ferrule.Tighten according tomanufacturer specifications...

EZ No-Vent GC/MS Connector for Shimadzu QP 2010 and QP 2010 Plus Mass Spectrometers Instruction Sheet (PDF)

... the connector.3.Install the plug included with the EZ No-Vent kit onto the column end oftheEZ No-Vent connector and finger tighten (Figure 9).Using a second wrenchto brace the EZ No-Vent connector,further tighten the plug...

TO-Clean Canister Cleaning System Instruction Manual (PDF)

... available Orbital Welded  Fitting Dewar Vacuum Valve Humidifier Touch Screen  Controller Oven Temp  Control...

Parker Instrument Tube Fitting Installation Manual (PDF)

...") Metric Size 6 thru 25 (6-25mm) 1-1/4 turns from finger tight Tube Plugs (FNZ/BLP) 1/4 turn from . Instructions are continued on the following page. 4. Close the pressure relief valve on the side of the hand...

Resprep VM-96 Vacuum Manifold Instruction Sheet (PDF)

...) 4. Vacuum gauge 4. Valve block assembly a. Vacuum attachment port (with on/off valve) b. Vacuum control valve 5. Shim pack a. Two 2 mm aluminum shims b. One 6 mm polypropylene shim c. Two 11 mm...

Resprep Sample Delivery System Instruction Sheet (PDF)

.../or close the manifold valve. Note: Do not allow the sorbent bed to go dry. Solvent above the sorbent bed valve to begin sampling. 6. Repeat step 1 after sampling is complete. #803-03-002 Rev. date: 03...

ChromaBLOGraphy: GC compound responses lower than expected? Maybe this will help.

We occasionally gets calls in tech service from a customer who has been experiencing lower than expected compound responses when analyzing a chemical standard.  In many cases we hear “It worked fine the last time we did it”.  So what could have happened since the last time you successfully did the analysis?  Several of the most […]

Sample Evaporation in Hot GC Injectors

.... Samples in volatile solvents cannot touch the insert wall, but do fall into a plug of wool . The smallest amount of wool which forms a short plug without major gaps (1-3 mg) serves the purpose. Additional...

Restek's PLOT Column Family PCSS1163F-UNV

Restek's porous layer open tubular (PLOT) columns feature an innovative bonding process that minimizes particle release, more consistent flow for stable retention times, and outstanding peak symmetry to improve impurity analysis. Restek® PLOT columns are the benchmark for performance.

Protect Natural Gas Sample Integrity and Prevent Sulfur Loss with Sulfinert® Sample Cylinders

... time. One sample was collected in a 1 L stainless steel sample cylinder with stainless steel valves with Sulfinert® valves at each end. Both samples were collected simultaneously and were analyzed...

Glass Indicating Oxygen Trap Instruction Sheet (PDF)

... the end plugs from both ends of the oxygen trap, then attach the trap to the gas line. Attach the outlet special procedures may be called for. Consult your company’s safety procedures. Note: While the end plugs...

NACRW 2017

Here’s a sneak peek at what we’ll be up to during this year’s show.

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