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Essentials

Columns

Raptor Polar X LC Columns

  • Reliably analyze a wide variety of polar analytes (acidic, basic, and neutral) without time-consuming derivatization or complex ion pairing.
  • Switch between HILIC and ion-exchange retention modes with simple mobile phase changes and short equilibration times.
  • 2.7 μm Raptor core-shell particles provide UHPLC-like speed and efficiency on all makes and models of LC systems.
  • Ideal for increasing sensitivity and selectivity in LC-MS analyses.

Storage Conditions: When not in use, Raptor Polar X columns must be kept in 100% acetonitrile. If using a buffered mobile phase, first flush thoroughly with 50:50 water:acetonitrile, then fill with acetonitrile for storage.

Raptor EXP Guard Column Cartridges

  • Free-Turn architecture lets you change cartridges by hand without breaking inlet/outlet fluid connections—no tools needed.
  • Patented titanium hybrid ferrules can be installed repeatedly without compromising high-pressure seal.
  • Auto-adjusting design provides ZDV (zero dead volume) connection to any 10-32 female port.
  • Guard column cartridges require EXP direct connect holder (cat.# 25808).
  • Pair with EXP hand-tight fitting (cat.# 25937–25938) for tool-free installation.

EXP Direct Connect Holder

  • Free-Turn architecture lets you change cartridges by hand without breaking inlet/outlet fluid connections—no tools needed.
  • Patented titanium hybrid ferrules can be installed repeatedly without compromising high-pressure seal.
  • Auto-adjusting design provides ZDV (zero dead volume) connection to any 10-32 female port.
  • EXP direct connect holder requires separate guard column cartridges; available from Restek in 2.1, 3.0, and 4.6 mm.
  • Pair with EXP hand-tight fitting (cat.# 25937–25938) for tool-free installation.

EXP In-Line Holder

  • Free-Turn architecture lets you change cartridges by hand without breaking inlet/outlet fluid connections—no tools needed.
  • Patented titanium hybrid ferrules can be installed repeatedly without compromising high-pressure seal.
  • Connects to any HPLC, UHPLC, injection, or switching valves with 1/16" stainless-steel tubing; ideal when using online trapping and preconcentration techniques.
  • EXP In-line holder requires separate guard column cartridges; available from Restek in 2.1, 3.0, and 4.6 mm.
  • Pair with EXP hand-tight fitting (cat.# 25937–25938) for tool-free installation.

Allure Acrylamide LC Column

  • Stable retention times for hundreds of matrix injections.
  • Faster equilibration times allow for method optimization and shorter analyses.
  • Accurate low ppt-level limits for acrylamide in drinking water.
  • Meet or exceed EN 16618:2015 and U.S. FDA procedure requirements for food applications.
  • Reliable, long-lasting performance injection to injection and column to column.

Allure Guard Cartridges

Particle Size: 5 µm spherical
Pore Size: 60 Å

For a detailed description of the stationary phase in this guard cartridge, see the product page for an analytical column with the same silica and stationary phase (e.g., Allure AK).

Trident LC Column Protection System

Redesigned to be more rugged and easier to use!

  • Match your needs with three levels of protection: filter only, cartridge only, or filter and cartridge.
  • Durable metal tip with replaceable PEEK ferrule means easy installation onto column without tools.
  • Improved thread design and materials create an optimal seal that releases and reseals easily, allowing multiple installations without galling and binding.
  • Easy-to-remove cap frit simplifies filter replacement.
  • Direct connection eliminates tubing and connectors that increase system volume and leak potential.
  • Low-dead-volume design has negligible effect on chromatography.

Siltek-Treated MXT Guard/Retention Gap Columns/Transfer Lines (passivated stainless steel)

  • Ideal for high-temperature applications.
  • Compatible with most common solvents.
  • Not recommended for strong acids and bases.
  • Temperature Range: –60° C to 450° C

Rxi-65TG Columns (fused silica)

High-polarity Crossbond phase

  • Ideal for the analysis of triglycerides in edible oils.
  • Excellent thermal stability up to 370 ˚C ensures consistent results and longer column lifetimes.
  • Separate and quantify critical triglycerides (acylglycerols) without interference from column bleed.
  • Observe even underivatized mono- and diglycerides.
  • Novel manufacturing techniques ensure consistent column-to-column quality.

Rxi-5Sil MS Columns (fused silica)

low-polarity phase; Crossbond 1,4-bis(dimethylsiloxy)phenylene dimethyl polysiloxane

  • Engineered to be a low-bleed GC-MS column.
  • Excellent inertness for active compounds.
  • General-purpose columns—ideal for GC-MS analysis of semivolatiles, polycyclic aromatic compounds, chlorinated hydrocarbons, phthalates, phenols, amines, organochlorine pesticides, organophosphorus pesticides, drugs, solvent impurities, and hydrocarbons.
  • Temperature range: -60 °C to 350 °C.
  • Some dimensions also available as Integra-Guard columns — a guard and analytical column in one to eliminate connection problems!

Rt-2560 Column (fused silica)

highly polar phase; biscyanopropyl polysiloxane—not bonded

  • Stationary phase selectivity optimized for isomer separation to ensure accurate quantification of critical cis/trans FAMEs.
  • Application-specific QC test guarantees consistent, reliable performance for AOAC 996.06 and AOCS Ce 1j-07 methods.
  • Excellent sample capacity; no peak distortion means easy, accurate peak integration.
  • Temperature range: 20–250 °C.

ProEZGC Chromatogram Modeler

Increase your laboratory’s productivity with Restek’s free, easy-to-use online chromatogram modeler; develop new methods and optimize existing ones in minutes directly from your desk.

Reference Standards

LC Passivation Solution

Used to passivate your LC system before your first analysis if you:

(a) are analyzing phosphorylated compounds or other polar molecules known to chelate or interact with metal ions in your LC (e.g., glyphosate);

and also

(b) have stainless steel in your instrument flow path;

and/or also

(c) your LC column hardware is showing activity towards phosphorylated compounds or other polar molecules known to chelate.

Ochratoxin A Standard

Ideal for mycotoxin analyses in cannabis and food testing labs.

Aflatoxins (B1, B2, G1, G2) Standard (4 components)

Ideal for mycotoxin analyses in cannabis and food testing labs.

LC Multiresidue Pesticide Kit

  • Accurately detect and quantify pesticides of global food safety concern in a wide range of fruits, vegetables, and other commodities by LC-MS/MS.
  • Full kit contains 204 compounds of interest, covering many LC-determined pesticides listed by government agencies; individual ampuls also sold separately.

GC Multiresidue Pesticide Kit

  • Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables, botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.
  • Comprehensive 203-compound kit covers food safety lists by the FDA, USDA, and other global governmental agencies; individual ampuls also sold separately.

Supplies & Accessories

Dynamic Duo (Restek Leak Detector and ProFLOW 6000 Flowmeter)

Protect your instrument and improve data quality with this powerful pair from Restek. Checking for leaks and verifying flows before you start running help you avoid costly problems later.

High-Temperature EI Filament

for Agilent 5972, 5973, 5975, or 5977 GC-MS

  • EI (electron ionization) filaments meet or exceed original manufacturer's performance.
  • Every filament is subjected to QC tests, including heat, electrical current, and resistance.
  • Samples from each filament manufacturing lot are installed in an MSD for in situ testing.

Carbon Dioxide Trap

  • Removes carbon dioxide from inert gases He, Ar, N2, H2, and clean dry air (CDA) to low ppb levels.
  • Functions by consuming carbon dioxide in a reaction with highly dispersed NaOH on a silicate support (reaction produces water that remains adsorbed in the purifier).
  • In highly critical applications, consider using an additional moisture trap after the CO2 trap as a safety measure.

Indicating Moisture Trap

  • Reduces water to less than 10 ppb. Indicator changes from yellowish green to blue at 5% relative humidity (suitable for general use).
  • Pre-purged for fast stabilization.
  • Reduces noise from high-sensitivity detectors.
  • Heavy-walled glass body prevents oxygen and water infusion.
  • 10 μm frit prevents microparticulate damage to needle valves and flow controllers.
  • Maximum operating pressure: 100 psi (689 kPa).

Indicating Oxygen Trap

  • Removes oxygen to low ppb levels from He, Ar, N2, or methane.
  • Indicator changes from green to gray when adsorption capacity is depleted.
  • Can be used with nonoxidizing gases such as He, Ar, N2, H2, or CH4.
  • Heavy-walled inner glass tube is protected by a sealed outer plastic tube to prevent oxygen and water infusion.
  • Prepurged for fast stabilization.
  • 100 psi (689 kPa) maximum operating pressure.
  • Reduces oxygen to 100 ppb.
  • 10 µm frits at inlet and outlet.
  • Optimal flow rate: < 150 mL/min.

Indicating Carrier Gas Purifier

  • Removes multiple impurities such as O2, H2O, CO2, CO, halogenated compounds, siloxanes, hydrocarbons (heavier than butane), sulfur-containing molecules, and ammonia from inert gases (He, Ar, N2, and H2).
  • Can be used with other filters to provide endpoint detection.
  • Contains highly sensitive visual indicators for oxygen and water contamination. The oxygen indicator signals breakthrough when the adsorbent changes from green to grey, and the moisture indicator signals breakthrough by changing from blue to brown.
  • Heavy-walled inner glass tube is protected by a sealed outer plastic tube to further protect against leaks.

Indicating Detector Gas Purifier

  • Removes moisture and hydrocarbons (C5 and heavier) from dry air or inert gases.
  • Indicator signals breakthrough by changing from yellowish green to blue at low relative humidity to warn of leaks in the gas stream.
  • The inner glass tube contains activated carbon, moisture indicator, and molecular sieve.
  • 10 μm frits at both ends of the filter.
  • Heavy-walled inner glass tube is protected by a sealed outer plastic tube to further protect against leaks.

Long-Life ESI Electrode

(for Sciex Turbo V Sources)

  • Same chromatographic performance as original equipment.
  • Rugged electrode lasts longer and requires fewer replacements.
  • Ensures more instrument uptime for sample analysis.

ESI Electrode Gauge

(for Sciex Turbo V Sources)

  • For installing/replacing the ESI electrode in Turbo V ion source probes.
  • Designed to ensure the correct electrode exposure distance from the probe tip.
  • Provides a quick-and-easy visual confirmation of electrode exposure.

Spring

(for Sciex Turbo V Sources)

O-Ring (3/16" ID x 1/16", Viton)

(for Sciex Turbo V Sources)

Union for TIS Probe/APCI, 1/16"

(for Sciex Turbo V Sources)

LC-MS/MS Infusion Kit

Everything you need to put together your own LC-MS/MS infusion rig has been included in this kit. It can be used with any LC-MS/MS and syringe pump—you can even Tee-in your LC mobile phase for the best signal optimization.

The kit includes a removable luer lock syringe needle for drawing your sample from a vial, tubing, fittings, a flashlight to check your spray, and even a tubing cutter to customize the length.

All components are individually reorderable.

Sample Handling

RAVEqc Quick-Connect Air Valves

  • Simplify your workflow—tool-free design makes it fast and easy for anyone to make consistent, quality connections.
  • Extend air canister and valve lifetime—no wrenches mean no overtightening or cross-threading damage.
  • Stand-alone or supporting roles—use alone or pair with a bellows/diaphragm valve for the ultimate in sample security and convenience.
  • Check status at a glance—if the parts are connected, the valve is open; if they’re apart, it’s closed. (Open-position valves also available.*)
  • Standard compression or tube end fittings accommodate a wide variety of air canisters and related devices.
  • Leak-free performance—each and every valve is helium leak tested to 1x10-6 mL/sec.
  • Compatible with Entech Micro-QT valves.

Note: A RAVEqc valve bracket is required for use with Restek 1, 3, 6, and 15 L air sampling canisters when using the compression fitting mounted directly on the 1/4" canister tube stub. This bracket is not needed when using Restek miniature canisters or Entech canisters.

Alicat Whisper Flow Calibrators

  • Quickly and precisely verify flow rates generated by vacuum or pressure before going into the field.
  • Ideal for real-time calibration of airflow controllers, passive sampling kits, air canisters, sampling pumps, and more.
  • Measure absolute pressure, mass flow, volumetric flow, and temperature of 98 different gases across a wide range of flows.
  • Choose a lab-based or convenient battery-powered portable model.

Tedlar Sampling Bags

  • Find the bags you need—we offer sizes from 0.5 L to 100 L.
  • Lightweight and easy to use.
  • Available with polypropylene or stainless-steel valve; choose bags with a septum fitting for syringe sampling or standard spiking.
  • Maximum operating temperature: 82 °C (180 °F) with polypropylene valves or 202 °C (397 °F) with stainless steel valves.

Note: Use only Point Style 5 or H syringe needles.

ALTEF Gas Sampling Bags

  • Excellent alternative to Tedlar bags for collection of most VOCs.
  • Unlike Tedlar bags, ALTEF bags do not produce background levels of dimethylacetamide (DMAC) or phenol.
  • Very low VOC and sulfur background compared to Tedlar bags.
  • Not recommended for ketones, acetates, hydrogen sulfide, or permanent gases.
  • Durable polyvinylidene fluoride (PVDF) film is resistant to abrasion and chemicals, including most acids and organic compounds.
  • Contain no additives, fillers, or pigments.

Note: Use only Point Style 5 or H syringe needles.

Multi-Layer Foil Gas Sampling Bags

  • Good stability for low molecular weight compounds, such as methane, CO, CO2, and permanent gases.
  • Chemically inert with light and moisture protection.
  • Not recommended for low ppm VOCs due to background levels.
  • Protective 4-layer barrier minimizes gas permeability
    • 60 gauge nylon (outer layer
    • Polyethylene
    • 0.0003" aluminum foil
    • 0.002" polyethylene (inner layer)
  • Maximum operating temperature: 82 °C (180 °F).

Note: Use only Point Style 5 or H syringe needles.

Resprep PLR SPE Products

  • Remove both proteins and phospholipids from biological samples in one easy, high-efficiency procedure.
  • Avoid signal suppression by removing interfering phospholipids from the sample matrix.
  • No method development—straightforward and effective sample preparation for acids, bases, and neutral compounds.
  • Offered in 96-well plate format for high-throughput or automated workflows and in cartridge format for lower throughput applications.
  • 3-way versatility for filtration—compatible with all common devices:
    • Vacuum manifolds
    • Positive pressure manifolds
    • Centrifugation

Resprep Polymeric SPE Cartridges and 96-Well Plates (Reversed Phase)

  • Silica-free, bonded polymeric material—no unwanted secondary silica interactions, even with basic compounds.
  • High surface area—higher loading capacity compared to silica-based sorbents.
  • Stable over a wide pH range (0–14)—won’t hydrolyze under extreme conditions.
  • Water-wettable—streamlined conditioning and equilibration steps drastically reduce solvent usage and sample prep time.
  • No flow-rate dependence—maintains retention and capacity after conditioning, even if dried out from vacuum or positive pressure flows.
  • Choose cartridges for high loading capacity; 96-well plates for high throughput and automation.

Resprep SLE Cartridges and 96-Well Plates

  • Faster and easier than SPE and liquid-liquid extraction: just load, wait 5 minutes, then elute.
  • Effective removal of proteins, phospholipids, and salts.
  • Quick concentration step increases sensitivity.
  • Easy to automate for high-throughput laboratories.
  • Suitable for a wide range of sample matrices and analyte pKa values.

Volume guidelines: Selecting an SLE format with sufficient loading capacity (1 mg sorbent to 1µL diluted sample) is very important because the entire sample volume (including 1:1 dilution in buffer) is absorbed into the diatomaceous earth sorbent. For example, a 100 µL sample should be diluted 1:1 with buffer for a total volume of 200 µL, which requires use of a 200 mg SLE product.

Resprep Quick-Replace SPE Vacuum Manifolds (12- or 24-Port)

  • Disposable, quick-replace valve liners ensure a clean flow path and eliminate cross-contamination of samples extracted on the same port.
  • Individual screw-type valves in each SPE port provide precise flow control.
  • Easily modified sample collection rack supports a wide variety of collection vessels.
  • Screw-type, solvent-resistant vacuum gauge and bleed valve offer better sealing and vacuum control.
  • Compatible with any standard male luer end SPE cartridge.

2.0 mL, 9 mm Solid-Top Polyethylene Caps

  • Compatible with all 9 mm screw-thread vials.
  • Molded, 10 mil, solid, pierceable cap.
  • PTFE-free—ideal for PFAS analysis (e.g., EPA 537) and other PFAS-sensitive methods.

Note: Polypropylene vials and caps prevent sample contamination from PTFE coated septa. However, since polypropylene caps do not reseal, evaporation occurs after injection. Multiple injections from the same vial are therefore not possible.

Limited-Volume 2.0 mL, 9 mm Screw-Thread Polypropylene Vials

  • Fit all 2.0 mL, 12 x 32 mm, vial-based autosamplers.
  • Compatible with all 9 mm screw-thread caps.
  • PTFE-free—ideal for PFAS analysis (e.g., EPA 537) and other PFAS-sensitive methods.

Note: Polypropylene vials and caps prevent sample contamination from PTFE coated septa. However, since polypropylene caps do not reseal, evaporation occurs after injection. Multiple injections from the same vial are therefore not possible.

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