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Essentials

Columns

Force Biphenyl LC Columns (USP L11)

  • Ideal for bioanalytical testing applications like drug and metabolite analyses.
  • Heightened selectivity and retention for compounds that are hard to resolve or elute early on C18 and other phenyl chemistries.
  • Limits ionization suppression and allows simple, MS-friendly mobile phases.
  • Restek’s most popular LC stationary phase.

Force FluoroPhenyl LC Columns (USP L43)

  • Capable of both reversed-phase and HILIC separations.
  • Ideal for increasing sensitivity and selectivity in LC-MS analyses.
  • Offers increased retention for charged bases.

Force C18 LC Columns (USP L1)

  • A traditional end-capped C18 ideal for general-purpose use in reversed-phase chromatography.
  • Wide pH range (2–8) provides excellent data quality for many applications, matrices, and compounds.
  • Offers high hydrophobic retention.

Force EXP Guard Column Cartridges

  • Free-Turn architecture lets you change cartridges by hand without breaking inlet/outlet fluid connectionsno 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.

Rxi Capillary GC Columns

Leverage the outstanding inertness, low bleed, and high reproducibility of Rxi GC Columns with 3-in-1 technology to gain:
  • Accurate Data
  • The Right Results Fast
  • Maximized Instrument Uptime

Raptor ARC-18 LC Columns (USP L1)

  • Ideal for high-throughput LC-MS/MS applications with minimal sample preparation.
  • Well-balanced retention profile for better detection and integration of large, multiclass analyte lists.
  • Sterically protected to endure low-pH mobile phases without sacrificing retention or peak quality.
  • Part of Restek’s Raptor LC column line featuring 1.8, 2.7, and 5 µm SPP core-shell silica.

Raptor Biphenyl LC Columns (USP L11)

  • Ideal for bioanalytical testing applications like drug and metabolite analyses.
  • Heightened selectivity and retention for compounds that are hard to resolve or elute early on C18 and other phenyl chemistries.
  • Limits ionization suppression and allows simple, MS-friendly mobile phases.
  • Part of Restek’s Raptor LC column line featuring 1.8, 2.7, and 5 µm SPP core-shell silica.

Raptor C18 LC Columns (USP L1)

  • A traditional end-capped C18 ideal for general-purpose use in reversed-phase chromatography.
  • Wide pH range (2–8) provides excellent data quality for many applications, matrices, and compounds.
  • Offers the highest hydrophobic retention of any Raptor phase.
  • Part of Restek’s Raptor LC column line featuring 1.8, 2.7, and 5 µm SPP core-shell silica.

Raptor FluoroPhenyl LC Columns (USP L43)

  • Capable of both reversed-phase and HILIC separations.
  • Ideal for increasing sensitivity and selectivity in LC-MS analyses.
  • Offers increased retention for charged bases.
  • Part of Restek’s Raptor LC column line featuring 1.8, 2.7, and 5 µm SPP core-shell silica.
  • Switch to a Raptor FluoroPhenyl LC column when you need more retention and selectivity for basic and hydrophilic compounds than you can achieve on a C18.

Raptor EtG/EtS LC Column

  • Proven performance for accurate, reliable ethyl glucuronide (EtG) and ethyl sulfate (EtS) analysis.
  • Strong retention consistently resolves analytes from matrix interferences.
  • Long column lifetime ensures consistent performance injection after injection.
  • Fast, 4-minute, dilute-and-shoot LC-MS/MS analysis supports high sample throughput.

Raptor HILIC-Si LC Columns (USP L3)

  • HILIC silica column designed for increased retention of polar compounds without ion-pairing reagents.
  • 2.7 µm Raptor core-shell particles provide the speed of SPP, with greater efficiency and capacity than 5 µm particles.
  • Ideal for increasing sensitivity and selectivity in LC-MS analyses.
  • Fully compatible with both HPLC and UHPLC when using low back-pressure HILIC mobile phases.
  • Switch to a Raptor HILIC-Si LC column when you need more retention and resolution of hydrophilic, polar analytes.

Raptor EXP Guard Column Cartridges

  • Free-Turn architecture lets you change cartridges by hand without breaking inlet/outlet fluid connectionsno 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.

Reference Standards

SPME Performance Test Mix (2 components)

  • Essential mix for establishing the performance of SPME fibers and SPME Arrows.
  • Verified composition and stability.

MOSH/MOAH Retention Time Standard (10 components)

  • Developed specifically for using LC coupled with GC-FID to accurately determine hydrocarbons found in mineral oils, which can migrate from processing equipment and packaging into food.
  • This 10-component mix contains both mineral oil saturated hydrocarbon (MOSH) and mineral oil aromatic hydrocarbon (MOAH) markers that are used to accurately identify GC retention time limits for integration.

QuEChERS Performance Standards Kit

  • Designed for use in all QuEChERS methods for pesticides in fruits and vegetables, including the original unbuffered method, AOAC 2007.01, and EN 15662.
  • Kit contains organochlorine, organonitrogen, organophosphorus, and carbamate pesticides commonly used on fruits and vegetables.
  • Volatile, polar, active, base-sensitive, and nonvolatile compounds are included to allow comprehensive evaluation of QuEChERS extraction and cleanup efficiencies, and optimization of GC and LC instrumental conditions.
  • Ideal for initial method evaluations and ongoing method performance validations.
  • Analytes are divided into three ampuls based on compatibility for maximum stability and shelf life.*
  • Precise formulations improve data quality and operational efficiency; spend more time running samples and less time sourcing and preparing standards.
  • Quantitatively analyzed to confirm the composition and stability of each mixture.

    *When combining compounds with different functionalities, chemical stability can be an issue. The analytes in this kit are separated into three mixes to ensure maximum long-term storage stability. For analysis, a fresh working standard should be prepared by combining the three kit mixes in a 1:1:1 ratio to prepare a 100 µg/mL working standard solution. Once blended, Restek does not recommend storing working standards or subsequent dilutions for future use.

    Contains 1 mL each of these mixtures.
    31153: QuEChERS Performance Standard A
    31154: QuEChERS Performance Standard B
    31155: QuEChERS Performance Standard C

Supplies & Accessories

EXP Direct Connect Holder

  • Free-Turn architecture lets you change cartridges by hand without breaking inlet/outlet fluid connectionsno 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.

UltraShield UHPLC PreColumn Filter

  • Cost-effective protection for UHPLC systems.
  • Reliable way to filter out particulates and extend column lifetime.
  • Minimize extra column volume and maximize UHPLC sample throughput vs. guard cartridges.
  • Universal fitconnects easily to any brand column.
  • Leak-tight to 15,000 psi (1,034 bar).
  • 0.5 µm or 0.2 µm stainless steel frit in a stainless steel body with PEEK ferrule.

EXP Reusable Fittings for HPLC & UHPLC for 10-32 fittings and 1/16" tubing

EXP Hand-Tight Fittings

  • Hand-tight fitting style achieves effortless HPLC seals—no tools needed for a 8,700+ psi seal.
  • Both hand-tight and hex-head styles wrench tighten for reliable UHPLC use up to 20,000+ psi!
  • Patented ferrule can be installed repeatedly without compromising high-pressure seal.
  • Hybrid design combines the durability of titanium with the sealing ability of PEEK.
  • Cutting-edge system provides ZDV (zero dead volume) connection to any 10-32 female port.
  • Compatible with 1/16" PEEK and stainless steel tubing.

Dual Vespel Ring Inlet Seals

Washerless, Leak-Tight Seals for Agilent GCs

  • Does not require a separate washer.
  • Requires less torque to seal.
  • Does not require retightening of reducing nut after several oven cycles.
  • Extends column lifetime by preventing oxygen from reaching the column.
  • Same price as the regular inlet seals with washers.
  • Gold plating provides enhanced inertness versus stainless steel.

Replacement Inlet Seals

for Agilent GCs

  • Gold plating provides enhanced inertness versus stainless steel.
  • All seals include washers.

Thermolite Plus Septa

  • Usable to 350 °C inlet temperature.*
  • Ultra-low bleed minimizes background signal.
  • New plasma coating eliminates sticking in the injection port.
  • Precision molding ensures consistent, accurate fit.
  • Septa have a CenterGuide design to minimize coring. (Not available on 6 mm, 7 mm, 8 mm, 9.5 mm, 10 mm and Shimadzu plug.)
  • 5 mm septa are partially predrilled for improved puncturability.
  • Preconditioned and ready to use.
  • Packaged in ultra-clean blister packs.
  • Each batch GC-FID tested.

PEEK Column Couplers

  • Connect two columns, a guard holder to a column, or inline sample prep holders.
  • One-piece, finger-tight design.
  • Self-adjusting to accommodate all 10-32 port depths.
  • Made of biocompatible PEEK.
  • Available in three IDs: 0.13, 0.17, or 0.25 mm.
  • Rated to 5,000 psi (350 bar).

PPS Hex-Head Fittings for HPLC

  • One-piece design; no ferrule required.
  • For 1/16" tubing on all 10-32 ports.
  • Made of polyphenylene sulfide (PPS).
  • Rated to 5,000 psi (350 bar).

PEEK Hex-Head Fittings for HPLC

  • One-piece design; no ferrule required.
  • For 1/16" tubing on all 10-32 ports.
  • Made of biocompatible PEEK.
  • Rated to 5,000 psi (350 bar).

PEEK-HT Hex-Head Fittings for HPLC and UHPLC

  • One-piece design; no ferrule required.
  • Use included driver for wrench-free, 10,000 psi connections.
  • For 1/16" tubing on all 10-32 ports.
  • Made of proprietary, high-pressure, biocompatible PEEK.
  • Rated to 10,000 psi (689 bar).

PEEK Unions, Tees, and Crosses for HPLC

  • Ideal for quickly and reliably connecting PEEK tubing in HPLC systems.
  • One-piece, finger-tight fittings—no ferrules required.
  • Low dead volume.
  • Included end fittings and body made of biocompatible PEEK.
  • Available in 0.25, 0.50, and 0.75 mm bore sizes.
  • Maximum temperature: 100 °C.
  • Rated to 5,000 psi (350 bar).
  • For 1/16" tubing on all 10-32 ports.

PEEK Tubing

  • Ideal for plumbing to and inside HPLC systems.
  • 1/16" OD in 3- and 10-meter lengths.
  • Less oxygen permeable and more temperature resistant than PTFE or Tefzel tubing.
  • Easily cut to length using Clean-Cut Tubing Cutter (cat.# 25069).
  • Use with PEEK finger-tight or flangeless fittings.
  • Use tubing 0.007" to 7,000 psi; tubing 0.010" ID to 5,000 psi.

Stainless Steel Fittings for UHPLC

  • Ideal for connecting stainless steel tubing in UHPLC systems.
  • For 1/16" tubing on all 10-32 ports.
  • Ferrules must be purchased separately.
  • 1/4" head on all nuts.

Stainless Steel Unions, Tees, and Crosses for UHPLC

  • Ideal for quickly and reliably connecting stainless steel tubing in UHPLC systems.
  • For 1/16" tubing on all 10-32 ports.
  • Body made of 316 stainless steel.
  • Includes 303 stainless steel nuts and 316 stainless steel ferrules.
  • Low dead volume.
  • Rated to 20,000 psi (1,375 bar).
  • 1/4" head on all nuts.

Stainless Steel Tubing

  • Ideal for all plumbing in UHPLC systems.
  • 1/16" OD in 3- and 10-meter coiled lengths.
  • 316 stainless steel.
  • Standard-grade tolerances: +/– 0.05 mm (.002") OD & ID; premium-grade tolerances: +/– 0.05 mm (.002") OD & +/– 0.025 mm (.001") ID.

Flexible Premium Grade Stainless Steel Tubing

  • Ideal for all plumbing in UHPLC systems.
  • 1/32" OD tubing with 17 mm long, 1/16" laser-welded ends.
  • Color bands for easy identification.
  • 316 stainless steel.
  • Tolerances: +/– 0.05 mm (.002") OD & +/– 0.025 mm (.001") ID.

Mobi-Cap GL-45 Bottle Tops

  • Protect your mobile phase from evaporation and contamination, and your lab from harmful vapors.
  • Includes tubing connector nuts with color-sleeve adaptors and ferrules.
  • Use one 1/4-28 threaded port for exhaust filter or air inlet valve; other ports can be used as needed or closed with 1/4-28 plug (sold separately).

Mobi-Cap GL-45 Bottle Top Kits

  • Convenient kits for easy mobile phase management.
  • Protect your mobile phase from evaporation and contamination, and your lab from harmful vapors.
  • Includes one 3-port Mobi-Cap GL-45 bottle top (cat.# 27836).
  • Includes PTFE tubing 1/8" OD x 0.063 mm ID x 3 m (cat.# 27846).
  • Includes two 1/16" connection sparger filters: one 2 μm (cat.# 27827) and one 10 μm (cat.# 27828).
  • Available with or without safety-coated GL-45 bottle(s).
  • Use one 1/4-28 threaded port for exhaust filter or air inlet valve; other ports can be used as needed or closed with 1/4-28 plug (sold separately).

Bottle Top Valves and Filters

  • Inlet valves protect your lab from volatile compounds; use with a filter to protect your mobile phase from bacterial contamination.
  • Outlet valve regulates pressure during helium sparging.
  • 1/4-28 threads for use on Mobi-Cap or Hub-Cap bottle tops.
  • Replace valves every 6 months and filters every 3 months; more frequently with rigorous use or use in harsh environments.

Eco-Cap GL-45 Bottle Tops

  • Economically protect your mobile phase from evaporation and contamination, and your lab from harmful vapors.
  • Order Hub-Cap adaptor (cat.# 26538) to allow use of Eco-Cap on 4-liter bottles.
  • Includes polypropylene male Luer plug.
  • No threading for fittings on the inside of the tubing ports; tubing is just inserted.

PTFE Tubing

  • Chemically inert tubing available in 0.094" and 0.063" IDs.
  • 1/8" OD in 3- and 10-meter lengths.
  • Easily cut to length using Clean-Cut Tubing Cutter (cat.# 25069).
  • Maximum temperature: 100 °C.
  • 1/4-28 threads for use on Mobi-Cap or Hub-Cap bottle tops.

Fittings and Ferrules for 1/8" & 1/16" Tubing

  • Ideal for safely and securely connecting PTFE tubing to Mobi-Cap bottle tops.

Last Drop Mobile Phase Filter

  • Protect your instrument and column by filtering your mobile phase of contaminants and particulates.
  • Choose stepped connector for 1.5/2.2/3.5 mm ID tubing or flangeless connector for 1/8" OD tubing.
  • Filter elements available in 316 stainless steel or metal-free PTFE.
  • Housing made of PTFE, connector of PEEK, optional flangeless connector ferrule of ETFE (not in flow path).

Mobile Phase Sparge Filters

  • Inexpensively prepare and maintain mobile phases free of dissolved oxygen, nitrogen, and other atmospheric gases.
  • Choose flangeless connector for either 1/16" or 1/8" OD tubing.
  • Filter elements available in 316 stainless steel or metal-free polyethylene (PE).
  • Connector made of PEEK, flangeless connector ferrule of ETFE (not in flow path).

Safety Exhaust Filter with Indicator

  • Breakthrough indicator changes from light pink to dark pink to notify you when to change filter.
  • Safety filter protects your lab from volatile compounds in waste bottles.
  • 1/4-28 threads for use on Mobi-Cap or Hub-Cap bottle tops.
  • Replace filter every 3 months or when indicator changes color; more frequently with rigorous use or use in harsh environments.

Sample Handling

Restek PAL SPME Arrow

  • Rugged stainless steel construction ensures longer lifetimes.
  • Faster extraction means higher sample throughput.
  • Better sensitivity allows lower LODs.

Restek PAL SPME Fibers

  • Suitable for a wide range of analyte chemistries and sample matrices.
  • Reliable performance meets or exceeds other brands.
  • Robust aluminum hub is more durable than plastic.
  • Optimized for PAL system autosamplers and compatible with most GC inlets.
  • SPME automated sample preparation reduces sample handling and solvent consumption.

Restek PAL SPME Arrow GC-Specific Conversion Kits

Due to the relatively large diameter of Restek PAL SPME Arrows, you must modify the GC inlet using an instrument-specific conversion kit prior to use.

Restek PAL SPME Manual Injection Kit

Designed to house SPME Arrows and traditional SPME fibers during extraction and injection steps.

SPME MicroCenter Caps and Septa

  • Micro-thin septum center pierces easily without bending needles or breaking SPME fibers.
  • Thicker outer septum wall secures septum in place and ensures a tight seal.
  • Versatile closures are suitable for SPME as well as dynamic and static headspace applications.
  • Septa are manufactured from low-extractability silicone and molded for dimensional conformity.
  • Available in magnetic 18 mm screw caps and 20 mm crimp caps.

Merlin Microseal Adaptor Kit for SPME Arrow

for Thermo TRACE Ultra GCs

  • Eliminates septum coring and prolongs septum life.
  • Consistently low needle-insertion force.
  • Simple installation with no injection port modification.
  • Larger diameter to accept SPME Arrow (1.1 mm or 1.5 mm).
  • 400 °C max injection port temperature.

    Microseals not included; must be purchased separately.

Merlin Microseal Nut for SPME Arrow

for Thermo TRACE 1300 and 1310 GCs

  • Eliminates septum coring and prolongs septum life.
  • Consistently low needle-insertion force.
  • Simple installation with no injection port modification.
  • Larger diameter to accept SPME Arrow (1.1 mm or 1.5 mm).
  • 400 °C max injection port temperature.

    Microseals not included; must be purchased separately.

Merlin Microseal Adaptor Kit for SPME Arrow

for Shimadzu 2010, 2025, and 2030 GCs

  • Eliminates septum coring and prolongs septum life.
  • Consistently low needle-insertion force.
  • Simple installation with no injection port modification.
  • Larger diameter to accept SPME Arrow (1.1 mm or 1.5 mm).
  • 400 °C max injection port temperature.

    Microseals not included; must be purchased separately.

Merlin Microseal Nut for SPME Arrow

for Agilent GCs

  • Eliminates septum coring and prolongs septum life.
  • Consistently low needle-insertion force.
  • Simple installation with no injection port modification.
  • Larger diameter to accept SPME Arrow (1.1 mm or 1.5 mm).
  • 400 °C max injection port temperature.

    Microseals not included; must be purchased separately.

Replacement Microseals for Merlin Microseal Septa

Merlin Microseal septa require the appropriate adaptor kit or nut for your GC. Choose standard Microseal kits/nuts for use with needles and traditional SPME fibers; choose SPME Arrow Microseal kits/nuts for use with SPME Arrow. Select a replacement seal and see Restek Recommends to order.