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Essentials

Columns

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 columnsideal 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.

Rxi-1ms Columns (fused silica)

nonpolar phase; Crossbond dimethyl polysiloxane

  • General-purpose columns for arson accelerants, essential oils, hydrocarbons, pesticides, PCB congeners (e.g., Aroclor mixes), sulfur compounds, amines, solvent impurities, simulated distillation, oxygenates, gasoline range organics (GRO), refinery gases.
  • Tested and guaranteed for ultra-low bleed; improved signal-to-noise ratio for better sensitivity and mass spectral integrity.
  • Temperature range: -60 °C to 330/350 °C.
  • Equivalent to USP G1, G2, and G38 phases.

Rxi-5ms Columns (fused silica)

low-polarity phase; Crossbond diphenyl dimethyl polysiloxane

  • General-purpose columns for semivolatiles, phenols, amines, residual solvents, drugs of abuse, pesticides, PCB congeners (e.g., Aroclor mixes), solvent impurities.
  • Most inert column on the market.
  • Tested and guaranteed for ultra-low bleed; improved signal-to-noise ratio for better sensitivity and mass spectral integrity.
  • Temperature range: -60 °C to 330/350 °C.
  • Equivalent to USP G27 and G36 phases.

Rxi-XLB Columns (fused silica)

low-polarity proprietary phase

  • General-purpose columns exhibiting extremely low bleed. Ideal for many GC-MS applications, including pesticides, PCB congeners (e.g., Aroclor mixes), PAHs.
  • Unique selectivity.
  • Temperature range: 30 °C to 360 °C.

Rxi-17Sil MS Columns (fused silica)

midpolarity Crossbond phase

  • Excellent inertness and selectivity for active environmental compounds, such as PAHs.
  • Low bleed for use with sensitive detectors, such as MS.
  • 340/360 °C upper temperature limits.
  • Equivalent to USP phase G3.

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 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 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.

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.

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 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 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 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.

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.

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

Oregon Pesticide Standards (6 separate mixes)

  • Meet specific cannabis pesticide residue analysis needs of Oregon – and states with similar pesticide residue regulations/programs.
  • Verified composition and stability.
  • 59 compounds in 6 x 1 mL ampules at 600 µg/mL – resulting in a convenient 100 µg/mL solution when blended immediately before use.
  • Prepared stock product eliminates the need for in-house standards preparation.

    If you formerly ordered these standards as customs, review compound lists before ordering — to improve stability, some formulations were changed slightly.

Supplies & Accessories

GC Accelerator Oven Insert Kit

for Agilent 6890 and 7890 instruments

  • Get the same GC separation in less time—use a GC Accelerator kit and the EZGC method translator to accurately convert methods to a scaled-down column format.
  • Scaled-down methods let you speed up analysis time and increase sample throughput without capital investment.
  • GC Accelerator kit installs easily without damaging the GC column or interfering with the MS interface.

Merlin Microseal Septa

for Agilent GCs

  • Eliminates septum coring and prolongs septum life.
  • Consistently low needle-insertion force.
  • Simple installation with no injection port modification.
  • Smaller diameter to accept 23-gauge needles and SPME fibers.
  • 400 °C max injection port temperature.

Merlin Microseal Septa

for Shimadzu GCs

  • Eliminates septum coring and prolongs septum life.
  • Consistently low needle-insertion force.
  • Simple installation with no injection port modification.
  • Smaller diameter to accept 23-gauge needles and SPME fibers.
  • 400 °C max injection port temperature.

Merlin Microseal Septa

for PerkinElmer GCs

  • Eliminates septum coring and prolongs septum life.
  • Consistently low needle-insertion force.
  • Simple installation with no injection port modification.
  • Smaller diameter to accept 23-gauge needles and SPME fibers.
  • 400 °C max injection port temperature.

Merlin Microseal Septa

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.
  • Smaller diameter to accept 23-gauge needles and SPME fibers.
  • 400 °C max injection port temperature.

Finger-Tight Capillary Column Nuts

  • Allow wrench-free column installations.
  • Available for standard (1/16") and compact (Agilent-style) ferrules.
  • Made from high-quality stainless steel.

Extended Capillary Column Nuts

for Agilent 5890/6850/6890/7890 GCs

  • Visible below inlet insulating cup for easy, breakage-free column installation without removing cup.
  • Finger-tight design to allow wrench-free use.
  • Available for standard (1/16") and compact (Agilent-style) ferrules.
  • Made from high-quality stainless steel.
  • Meets or exceeds original manufacturer's performance.

Restek Electronic Leak Detector

Don't let a small leak turn into a costly repairprotect your analytical column by using a Restek leak detector.

  • Audible tone indicates the severity of a leak.
  • Redesigned circuitry offers 12 hours of operation between charges.
  • Detects a broad range of gases; Ex rated for use with hydrogen and other explosive gases.*

Rinse/Waste Vials with Diffusion Caps

for use with Agilent 7673, 7683, and 7693 Autosamplers

  • Diffusion caps prevent evaporation of volatile solvents.
  • Six different cap colors make solvent identification easier.
  • Graduated marks on vials indicate content volume.
  • Includes twelve vials and caps (two caps of each color).

Z-Belt

for Agilent 7673B & 7683 Autosamplers

Meets original manufacturer's performance.

Turret Tray Assembly

for Agilent 7673 Autosamplers

Holds sample, waste, and solvent vials.

Carriage Motor Belt

for Agilent 7673A, 7673B, and 7673C Autosamplers

Meets original manufacturer's performance.

Autosampler Plunger Carrier Belt

for Agilent 7673A & 7673B Autosamplers

All parts meet or exceed original manufacturer's performance.

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.

EXP2 Reusable Fittings for HPLC & UHPLC

for 10-32 fittings and 1/16" tubing

  • Unique nut driver allows easy 20,000+ psi seals without wrenches.*
  • Patented ferrule can be installed repeatedly without compromising high-pressure seal.
  • Precision design provides zero-dead-volume (ZDV) connection to any 10-32 port.
  • Compact design fits in tight spaces, perfect for small oven compartments and six-port injection valves.
  • Non-swaged ferrules mean vendor-specific tubing is not required.
  • Suitable for both HPLC and UHPLC.

    *Rated to 20,000+ psi (1,400 bar) and tested to 30,000 psi (2,068 bar).

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

EXP Hand-Tight Coupler

  • 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.

Preventive Maintenance (PM) Kits

for Waters HPLC & ACQUITY UPLC Systems

Survival Kit for HPLC, Stainless Steel

For start-up and maintenance in all HPLC systems.

The stainless steel survival kit contains a wide range of tubing, fittings, and tools necessary to set up and maintain your HPLC system: a selection of lengths and IDs of 1/16-inch tubing, plus nuts, ferrules, a ValvTool wrench, and a zero-dead-volume union.

Survival Kit for HPLC, PEEK

For start-up and maintenance in all HPLC systems.

The PEEK Survival Kit is an invaluable parts kit that contains tubing, fittings, and tools essential for setting up and maintaining your HPLC system: PEEK tubing, connectors, and elbows, PTFE tubing, a tubing cutter and extra blades, a ValvTool wrench, open-end wrenches, and more.

Autosampler Preventive Maintenance Kit

for Agilent 1100, 1200 HPLC Systems

Seal Pack (Rebuilt - with Needle)

for Waters 717 Autosampler

Needle Assembly

for Agilent HPLC Systems

Note: Syringes and needles sold by Restek are intended for scientific research and laboratory use only and are not intended for human in vivo or animal use.

Needle Seat Assembly

for Agilent HPLC Systems

Vials and Plates

Vials, caps and septa, inserts, racks, and well plates for your entire lab.

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.