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Fused Silica Capillary

Fused Silica Capillary

Products

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. Click here for more information on our Rxi® columns.

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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 (bleed-tested temperature/maximum operating temperature).
  • Equivalent to USP G27 phase.

    Click here for more information on our Rxi® columns.

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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 (bleed-tested temperature/maximum operating temperature).
  • Equivalent to USP G2 phase.

    Click here for more information on our Rxi® columns.

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Stabilwax® Columns (fused silica)

(polar phase; Crossbond® polyethylene glycol)

  • Most stable polyethylene glycol (PEG) column available.
  • Rugged enough to withstand repeated water injections.
  • Lowest-bleed PEG column on the market; long column lifetimes.
  • Temperature range: 40 °C to 260 °C.
  • Equivalent to USP G14, G15, G16, G20, and G39 phases.

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Rxi®-624Sil MS Columns (fused silica)

(midpolarity Crossbond® phase)

  • Low-bleed, high-thermal stability column—maximum temperatures up to 320 °C.
  • Inert—excellent peak shape for a wide range of compounds.
  • Selective—highly selective for volatile organics and residual solvents, great choice for USP<467>.
  • Manufactured for column-to-column reproducibility—well-suited for validated methods.

    Click here for more information on our Rxi® columns.

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Rxi®-17Sil MS Columns (fused silica)

(midpolarity Crossbond® phase)


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Rt®-2560 Column (fused silica)

(highly polar phase; biscyanopropyl polysiloxane—not bonded)

  • Application-specific column for cis/trans FAMEs.
  • Stable to 250 °C.

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Rtx®-DHA Columns (fused silica)

(Crossbond® 100% dimethyl polysiloxane—optimized for hydrocarbon analysis)

  • Columns meet or exceed all ASTM D6730-01 and CAN/CGSB 3.0 No. 14.3-99 method guidelines; test report for method D6730 supplied with each column.
  • Excellent responses and peak symmetry for polar oxygenates.

    Don't forget: The ASTM D6730 method also requires a tuning column—Rtx®-5 DHA Tuning Column

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Rtx®-Biodiesel TG Columns (fused silica)

  • Linearity for all reference compounds exceeds method requirements.
  • Columns with retention gaps feature Alumaseal® connectors to prevent leaks and extend column life.
  • Low column bleed at high temperatures.
  • For glycerin and glycerides analysis, according to ASTM D6584 and EN 14105 methods. Technical Article: Analyze Biodiesel Oil for Glycerin

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Stabilwax®-DA Columns (fused silica)

(polar phase; Crossbond® acid-deactivated Carbowax® polyethylene glycol—for acidic compounds)

  • Application-specific columns for free (underivatized) acids, some inorganic acids.
  • Resistant to oxidative damage.
  • Temperature range: 40 °C to 250 °C.
  • Equivalent to USP G25, G35 phases.

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Stabilwax®-DB Columns (fused silica)

(polar phase; Crossbond® base-deactivated Carbowax® polyethylene glycol—for amines and basic compounds)

  • Application-specific columns for underivatized amines and other basic compounds, including alkylamines, diamines, triamines, nitrogen-containing heterocyclics. No need for column priming.
  • Temperature range: 40 °C to 220 °C.

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Rxi® Guard/Retention Gap Columns (fused silica)


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Rtx®-BAC Plus 1 Columns (fused silica)

  • Optimized column selectivities guarantee resolution of ethanol, internal standards, and frequently encountered interferences.
  • Robust and reproducible column chemistry ensures longer column lifetime and consistent results.
  • 2 minute analysis time increases lab productivity.
  • Stable to 260 °C Don’t forget: Blood alcohol analysis requires dual column confirmation when using GC/FID. Click here for information on the secondary column for this application.

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Rtx®-BAC Plus 2 Columns (fused silica)

  • Optimized column selectivities guarantee resolution of ethanol, internal standards, and frequently encountered interferences.
  • Robust and reproducible column chemistry ensures longer column lifetime and consistent results.
  • 2 minute analysis time increases lab productivity.
  • Stable to 260 °C Don’t forget: Blood alcohol analysis requires dual column confirmation when using GC/FID. Click here for information on the primary column for this application.

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Innovative Integra-Guard® Columns

Get the protection without the connection!

  • These innovative columns incorporate both guard column and analytical column in a continuous length of tubing, eliminating the connection and all connection-associated problems!
  • The guard column section is marked separately from the analytical column, using high-temperature string.
  • A wide variety of our Integra-Guard® capillary columns are available.

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Rxi®-PAH Columns (fused silica)

(midpolarity proprietary phase)


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Rxi®-5HT Columns (fused silica)

(low polarity phase; diphenyl dimethyl polysiloxane)


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Rxi®-35Sil MS Columns (fused silica)

(midpolarity Crossbond® phase)

  • Special selectivity and excellent inertness for substituted polar compounds, such as drugs, pesticides, herbicides, PCBs, phenols, etc.
  • Provides superior separation for cannabinoids.
  • Very low-bleed phase for GC-MS analysis.
  • Extended temperature range: 50 °C to 340/360 °C. Click here for more information on our Rxi® columns.

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GCxGC Selectivity Kit (0.25 mm)

  • Wide range of stationary phases helps ensure orthogonal separations; each kit includes one Rxi®-1ms, Rxi®-5Sil MS, Rxi®-XLB, Rxi®-17Sil MS, Rtx®-200, and Stabilwax® column.
  • Comprehensive kit simplifies column selection for method developers and frequent GCxGC users alike.
  • Convenient 2 m lengths are ideal for use as secondary columns in GCxGC analyses.
  • Included Press-Tight® connectors offer a reliable, hassle-free installation.
  • High thermal stability maximizes system ruggedness and sensitivity.
  • Unrivaled column inertness means accurate analysis of active compounds.
  • Choose 0.15, 0.18, or 0.25 mm ID format to accommodate your specific sample capacity, speed, and detector needs.

    Click here to visit our GCxGC column combination guide.

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GCxGC Selectivity Kit (0.18 mm)

  • Wide range of stationary phases helps ensure orthogonal separations; each kit includes one Rxi®-1ms, Rxi®-5Sil MS, Rxi®-XLB, Rxi®-17Sil MS, Rtx®-200, and Stabilwax® column.
  • Comprehensive kit simplifies column selection for method developers and frequent GCxGC users alike.
  • Convenient 2 m lengths are ideal for use as secondary columns in GCxGC analyses.
  • Included Press-Tight® connectors offer a reliable, hassle-free installation.
  • High thermal stability maximizes system ruggedness and sensitivity.
  • Unrivaled column inertness means accurate analysis of active compounds.
  • Choose 0.15, 0.18, or 0.25 mm ID format to accommodate your specific sample capacity, speed, and detector needs.

    Click here to visit our GCxGC column combination guide.

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GCxGC Selectivity Kit (0.15 mm)

  • Wide range of stationary phases helps ensure orthogonal separations; each kit includes one Rxi®-1ms, Rxi®-5Sil MS, Rxi®-XLB, Rxi®-17Sil MS, Rtx®-200, and Stabilwax® column.
  • Comprehensive kit simplifies column selection for method developers and frequent GCxGC users alike.
  • Convenient 2 m lengths are ideal for use as secondary columns in GCxGC analyses.
  • Included Press-Tight® connectors offer a reliable, hassle-free installation.
  • High thermal stability maximizes system ruggedness and sensitivity.
  • Unrivaled column inertness means accurate analysis of active compounds.
  • Choose 0.15, 0.18, or 0.25 mm ID format to accommodate your specific sample capacity, speed, and detector needs.

    Click here to visit our GCxGC column combination guide.

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Rxi®-1HT Columns (fused silica)

(nonpolar phase; dimethyl polysiloxane)


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Rtx®-5 DHA Tuning Column (fused silica)

(Crossbond® 5% diphenyl/95% dimethyl polysiloxane—optimized for hydrocarbon analysis)

Rtx®-1614 Columns (fused silica)

(5% diphenyl, 95% dimethyl polysiloxane)

  • Optimized for PBDE analysis by EPA Method 1614.
  • Short column option resolves BDE-209 3 times faster, with less thermal breakdown.
  • Unique deactivation gives higher BDE-209 response, compared to DB-5HT columns, for greater analytical sensitivity.
  • Exceeds EPA Method 1614 resolution criteria for BDE-49 and BDE-71.

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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.

    Click here for more information on our Rxi® columns.

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Rtx®-CLPesticides Column Kit (0.32 mm ID)

(Note: Columns are not preconnected in this kit.)


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Rxi®-17 Columns (fused silica)

(midpolarity phase; Crossbond® diphenyl dimethyl polysiloxane)


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Rtx®-PCB Columns (fused silica)

(proprietary Crossbond® phase)

  • Unique polymer for PCBs analysis by GC-ECD or GC-MS.
  • Good results for other semivolatiles.
  • Low polarity; inert to active compounds.
  • Stable to 340 °C.

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Rtx®-Dioxin2 Columns (fused silica)

(proprietary Crossbond® phase)

  • Isomer specificity for 2,3,7,8-TCDD and 2,3,7,8-TCDF achieved with one GC column.
  • Thermally stable to 340 °C for longer lifetime.
  • Unique selectivity for toxic dioxin and furan congeners allows use as a confirmation GC column.

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Rtx®-OPPesticides2 Columns (fused silica)

(proprietary Crossbond® phases)

  • Application-specific columns for organophosphorus pesticides; best column combination for US EPA Method 8141A.
  • Low bleed—ideal for GC-FPD, GC-NPD, or GC-MS analyses.
  • Stable to 330 °C.

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Rtx®-CLPesticides Column Kit (0.25 mm ID)

(Note: Columns are not preconnected in this kit.)


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Rtx®-CLPesticides Column Kit (0.53 mm ID)

(Note: Columns are not preconnected in this kit.)


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Rtx®-VMS Columns (fused silica)

(proprietary Crossbond® phase)

  • Application-specific columns for volatile organic pollutants by GC-MS.
  • Complete separation of U.S. EPA Method 8260B compounds in less than 10 minutes.
  • Stable to 260 °C.
  • No known equivalent phases.

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Rtx®-CLPesticides2 Columns (fused silica)

(proprietary Crossbond® phases)

  • Application-specific columns for organochlorine pesticides and herbicides.
  • Low bleed—ideal for GC-ECD or GC-MS analyses.
  • Baseline separations in less than 10 minutes.
  • Stable to 340 °C.
  • Analyze 8081B, 8082A, 8151A, 504.1, 515, 508.1, and 552.2 compounds without time-consuming column change.
  • See how our Rtx®-CLPesticides columns compare to the competition at www.restek.com/RtxCLP7.

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Rtx®-CLPesticides Columns (fused silica)

(proprietary Crossbond® phases)

  • Application-specific columns for organochlorine pesticides and herbicides.
  • Low bleed—ideal for GC-ECD or GC-MS analyses.
  • Baseline separations in less than 10 minutes.
  • Stable to 340 °C.
  • Analyze EPA Method 8081B, 8082A, 8151A, 504.1, 515, 508.1, and 552.2 compounds without time-consuming column change.
  • See how our Rtx®-CLPesticides columns compare to the competition at www.restek.com/RtxCLP7.

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FAMEWAX Columns (USP G16) (fused silica)

(polar phase; Crossbond® polyethylene glycol)

  • Application-specific columns for FAMEs, specially tested with a FAME mixture.
  • Temperature range: 20 °C to 250 °C.

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Rt®-CW20M F&F Columns (fused silica)

(polar phase; Carbowax® polyethylene glycol—not bonded)

  • Application-specific columns for flavor and fragrance compounds, specially tested.
  • True nonbonded Carbowax® 20M polarity.
  • Temperature range: 60 °C to 220 °C.

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Rtx®-65TG Columns (fused silica)

(high polarity phase; Crossbond® diphenyl dimethyl polysiloxane)

  • Application-specific columns, specially tested for triglycerides.
  • Stable to 370 °C.

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Rt®-TCEP Columns (fused silica)

(highly polar phase; 1,2,3-tris[2-cyanoethoxy]propane—not bonded)

  • General-purpose columns, ideal for aromatics and oxygenates in gasoline.
  • Temperature range: 0 °C to 135 °C.

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Rtx®-G43 Column (fused silica with 5-meter Integra-Guard® guard column)

(Crossbond® cyanopropylphenyl dimethyl polysiloxane)

  • Application-specific columns for residual solvents in pharmaceutical products. Meet all requirements of USP <467>.
  • Analytical column with Integra-Guard® guard column eliminates connecting problems and leaks.
  • Rtx®-G43 stable to 240 °C.

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Rtx®-G27 Column (fused silica with 5-meter Integra-Guard® guard column)

(Crossbond® diphenyl dimethyl polysiloxane)

  • Application-specific columns for residual solvents in pharmaceutical products. Meet all requirements of USP <467>.
  • Analytical column with Integra-Guard® guard column eliminates connecting problems and leaks.
  • Rtx®-G27 stable to 290 °C.

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Rtx®-5 Columns (fused silica)

(low polarity phase; Crossbond® diphenyl dimethyl polysiloxane)

  • General-purpose columns for drugs, solvent impurities, pesticides, hydrocarbons, PCB congeners (e.g., Aroclor mixes), essential oils, semivolatiles.
  • Temperature range: -60 °C to 350 °C.
  • Equivalent to USP G27 and G36 phases.

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Rtx®-1 Columns (fused silica)

(nonpolar phase; Crossbond® dimethyl polysiloxane)

  • General-purpose columns for solvent impurities, PCB congeners (e.g. Aroclor mixes), simulated distillation, arson accelerants, gases, natural gas odorants, sulfur compounds, essential oils, hydrocarbons, semivolatiles, pesticides, oxygenates.
  • Temperature range: -60 °C to 350 °C.
  • Equivalent to USP G1, G2, G38 phases.

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Rxi®-XLB Secondary Columns for GCxGC (fused silica)

(low polarity proprietary phase)


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Rtx®-200 Secondary Columns for GCxGC (fused silica)

(midpolarity phase; Crossbond® trifluoropropylmethyl polysiloxane)


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Stabilwax® Secondary Columns for GCxGC (fused silica)

(polar phase; Crossbond® Carbowax® polyethylene glycol)

  • Convenient 2 m length is ideal for use as a secondary column in GCxGC analyses.
  • Most stable polyethylene glycol (PEG) phase available.
  • Rugged enough to withstand repeated water injections.
  • Temperature range: 40 °C to 260 °C.

    Learn more about Restek GCxGC products.

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Rxi®-1ms Secondary Columns for GCxGC (fused silica)

(nonpolar phase, Crossbond® 100% dimethyl polysiloxane)


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Rxi®-5Sil MS Secondary Columns for GCxGC (fused silica)

(low polarity Crossbond® silarylene phase; similar to 5% phenyl/95% dimethyl polysiloxane)


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Rxi®-17Sil MS Secondary Columns for GCxGC (fused silica)

(midpolarity Crossbond® silarylene phase; similar to 50% phenyl/50% dimethyl polysiloxane)


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Rtx®-Volatile Amine Columns (fused silica)

  • Unique selectivity for baseline resolution of all volatile amines.
  • Excellent inertness assures accuracy and sensitivity for volatile amines, including free ammonia.
  • Highly robust phase withstands repeated water injections, resulting in longer column lifetime.
  • High temperature stability (290 °C) ensures elution of amines up to C16 and allows contaminants to be removed by “baking out” the column.

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Rtx®-Mineral Oil Columns (fused silica)

  • Application specific columns meet DIN EN ISO 9377-2:2000 requirements.
  • Optimized column dimensions for fast mineral oil screening.
  • Surface linked phase guarantees long lifetime, robustness, and stability to 400 °C.

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Rt®-LC50 Columns (fused silica)

(polar, dimethyl [50% liquid crystal] polysiloxane)

  • General purpose column with selectivity for dioxin or furan congeners, or PCB congeners.
  • Low bleed at 270°C.
  • Temperature range: 100°C to 270°C.

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Rt®-PAH Columns (fused silica)

(polar, proprietary liquid crystalline phase)

  • Specially designed for the analysis of polycyclic aromatic hydrocarbons (PAHs) listed in US EPA methods 610 and 8100.
  • Low bleed at 285°C.
  • Temperature range: 80°C to 285°C.

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Rtx®-440 Columns (fused silica)

(midpolarity proprietary Crossbond® phase)

  • General-purpose columns with unique selectivity for pesticides, PAHs, or other semivolatiles. Ideal for low/trace level analyses.
  • Low-bleed, high-resolution columns with unique selectivity.
  • Wide temperature range: 20 °C to 340 °C.

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Rtx®-35 Amine Columns (fused silica)

(midpolarity phase; Crossbond® 35% diphenyl/65% dimethyl polysiloxane)

  • Application-specific columns for amines and other basic compounds, including alkylamines, diamines, triamines, ethanolamines, and nitrogen-containing heterocyclics.
  • Stable to 220 °C.

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Rtx®-624 Columns (fused silica)

(low to midpolarity phase; Crossbond® cyanopropylphenyl dimethyl polysiloxane)

  • Application-specific columns for volatile organic pollutants. Recommended in U.S. EPA methods for volatile organic pollutants.
  • Temperature range: -20 °C to 240 °C.
  • Equivalent to USP G43 phase.

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Rtx®-502.2 Columns (fused silica)

(proprietary Crossbond® diphenyl/dimethyl polysiloxane phase)

  • Application-specific columns with unique selectivity for volatile organic pollutants. The Rtx®-502.2 column is cited in U.S. EPA Method 502.2 and in many gasoline range organics (GRO) methods for monitoring underground storage tanks.
  • Excellent separation of trihalomethanes; ideal polarity for light hydrocarbons and aromatics.
  • Stable to 270 °C.

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Rtx®-VRX Columns (fused silica)

(proprietary Crossbond® phase)

  • Application-specific columns for volatile organic pollutants.
  • Excellent for U.S. EPA Method 8021 compounds.
  • Stable to 260 °C.

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Rtx®-OPPesticides Columns (fused silica)

(proprietary Crossbond® phases)

  • Application-specific columns for organophosphorus pesticides; best column combination for U.S. EPA Method 8141A.
  • Low bleed—ideal for GC-FPD, GC-NPD, or GC-MS analyses.
  • Stable to 330 °C.

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Rtx®-2330 Columns (fused silica)

(highly polar phase; biscyanopropyl cyanopropylphenyl polysiloxane)

  • General-purpose columns for cis/trans FAMEs, dioxin isomers.
  • Temperature range: 0 °C to 275 °C.
  • Equivalent to USP G8 and G48 phase.

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Rtx®-Wax Columns (fused silica)

(polar phase; Crossbond® polyethylene glycol)

  • Best polyethylene glycol (PEG) phase for alkenols, glycols, and aldehydes.
  • Temperature range: 20 °C to 250 °C.
  • Equivalent to USP G14, G15, G16, G20, G39 phases.

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Rtx®-225 Columns (fused silica)

(polar phase; Crossbond® cyanopropylmethyl phenylmethyl polysiloxane)

  • General-purpose columns for FAMEs, carbohydrates, sterols, flavor compounds.
  • Temperature range: 40 °C to 240 °C.
  • Equivalent to USP G7, G19 phases.

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Rtx®-65 Columns (fused silica)

(mid to high polarity phase; Crossbond® diphenyl dimethyl polysiloxane)

  • General-purpose columns for phenols, fatty acids, triglycerides.
  • Temperature range: 50 °C to 300 °C.
  • Equivalent to USP G17 phase.

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Rtx®-200 Columns (fused silica)

(midpolarity phase; Crossbond® trifluoropropylmethyl polysiloxane)

  • General-purpose columns for solvents, Freon® fluorocarbons, alcohols, ketones, silanes, glycols, and drugs of abuse. Excellent confirmation column with an Rtx®-5 column for phenols, nitrosamines, organochlorine pesticides, chlorinated hydrocarbons, and chlorophenoxy herbicides.
  • Temperature range: -20 °C to 340 °C.
  • Equivalent to USP G6 phase.

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Rtx®-50 Columns (fused silica)

(midpolarity phase; Crossbond® phenyl methyl polysiloxane)

  • General-purpose columns for pesticides, herbicides, rosin acids, phthalate esters, sterols.
  • Temperature range: 40 °C to 320 °C.
  • Equivalent to USP G3 phase.

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Rtx®-35 Columns (fused silica)

(midpolarity phase; Crossbond® diphenyl dimethyl polysiloxane)

  • General-purpose columns for organochlorine pesticides, PCB congeners (e.g., Aroclor mixes), herbicides, pharmaceuticals, sterols, rosin acids, phthalate esters.
  • Temperature range: 40 °C to 320 °C.
  • Equivalent to USP G42 phase.

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Rtx®-1701 Columns (fused silica)

(midpolarity Crossbond® phase)

  • General-purpose columns for alcohols, oxygenates, PCB congeners (e.g. Aroclor mixes), pesticides.
  • Temperature range: -20 °C to 280 °C.
  • Equivalent to USP G46 phase.

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Rtx®-1301 (G43) Columns (fused silica)

(low to midpolarity phase; Crossbond® cyanopropylphenyl dimethyl polysiloxane)

  • General-purpose columns for residual solvents, alcohols, oxygenates, and volatile organic compounds.
  • Temperature range: -20 °C to 280 °C.
  • Equivalent to USP G43 phase.

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Rtx®-20 Columns (fused silica)

(low to midpolarity phase; Crossbond® diphenyl dimethyl polysiloxane)

  • General-purpose columns for volatile compounds, flavor compounds, alcoholic beverages.
  • Temperature range: -20 °C to 320 °C.
  • Equivalent to USP G28, G32 phases.

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Rtx®-5 Amine Columns (fused silica)

(low polarity phase; Crossbond® 5% diphenyl/95% dimethyl polysiloxane)

  • Application-specific columns for amines and other basic compounds, including alkylamines, diamines, triamines, ethanolamines, and nitrogen-containing heterocyclics.
  • Stable to 315 °C.

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Intermediate-Polarity Deactivated Guard/Retention Gap Columns/Transfer Lines (fused silica)

  • Tested with a comprehensive test mix to ensure high inertness.
  • Useful for a wide range of applications.
  • Use with most common solvents.
  • Maximum temperature: 325 °C

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Rt®-γDEXsa Columns (fused silica)

(2,3-di-acetoxy-6-O-tert-butyl dimethylsilyl gamma cyclodextrin added into 14% cyanopropylphenyl/86% dimethyl polysiloxane)

Uses: Larger organic molecules. Also useful for flavor compounds in fruit juices.

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Rt®-βDEXcst Columns (fused silica)

(Proprietary cyclodextrin material added into 14% cyanopropylphenyl/86% dimethyl polysiloxane)

Uses: Proprietary stationary phase, developed specifically for the fragrance industry. Also used for pharmaceutical applications.

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Rt®-βDEXsa Columns (fused silica)

(2,3-di-acetoxy-6-O-tert-butyl dimethylsilyl beta cyclodextrin added into 14% cyanopropylphenyl/86% dimethyl polysiloxane)

Uses: Unique selectivity for esters, lactones, and other fruit flavor components.

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Rt®-βDEXsp Columns (fused silica)

(2,3-di-O-propyl-6-O-tert-butyl dimethylsilyl beta cyclodextrin added into 14% cyanopropylphenyl/86% dimethyl polysiloxane)

Uses: Often useful in dual-column configurations, with the Rt-βDEXsm column, for complex enantiomeric separations.

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Rtx®-Volatiles Columns (fused silica)

(proprietary Crossbond® diphenyl/dimethyl polysiloxane phase)

  • Application-specific columns for volatile organic pollutants.
  • Stable to 280 °C.

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Rtx®-2887 Column (fused silica)

(nonpolar phase; Crossbond® 100% dimethyl polysiloxane—for simulated distillation)

  • Application-specific column for simulated distillation.
  • Stable to 360 °C.

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Rtx®-200MS—Low-Bleed GC-MS Columns (fused silica)

(midpolarity phase; Crossbond® trifluoropropylmethyl polysiloxane)

  • General purpose columns for solvents, Freon® fluorocarbons, alcohols, ketones, silanes, glycols. Excellent confirmation column with an Rtx®-5 column for phenols, nitrosamines, organochlorine pesticides, chlorinated hydrocarbons, and chlorophenoxy herbicides.
  • Temperature range: -20 °C to 340 °C.
  • Equivalent to USP G6 phase.

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Rtx®-5MS—Low-Bleed GC-MS Columns (fused silica)

(low polarity phase; Crossbond® diphenyl dimethyl polysiloxane)

  • General purpose columns for drugs, solvent impurities, pesticides, hydrocarbons, PCB congeners (e.g., Aroclor mixes), essential oils, semivolatiles.
  • Temperature range: -60 °C to 350 °C.
  • Equivalent to USP G27 and G36 phases.

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Rtx®-BAC2 Columns (fused silica)

(proprietary Crossbond® phase)

  • Application-specific columns for blood alcohol analysis—achieve baseline resolution in less than 3 minutes. Also excellent for abused inhalant anesthetics, γ-hydroxybutyrate (GHB)/γ-butyrolactone (GBL), glycols, and common industrial solvents.
  • Rtx®-BAC2 confirmation column provides four elution order changes under the same conditions.
  • Stable to 260 °C.

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Rtx®-BAC1 Columns (fused silica)

(proprietary Crossbond® phase)

  • Application-specific columns for blood alcohol analysis—achieve baseline resolution in less than 3 minutes. Also excellent for abused inhalant anesthetics, γ-hydroxybutyrate (GHB)/γ-butyrolactone (GBL), glycols, and common industrial solvents.
  • Rtx®-BAC2 confirmation column provides four elution order changes under the same conditions.
  • Stable to 260 °C.

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Siltek®-Deactivated Guard/Retention Gap Columns/Transfer Lines (fused silica)

  • Tested with a comprehensive test mix, to ensure high inertness.
  • Revolutionary deactivation process for superior inertness.
  • Analyze active samples accurately; ideal for chlorinated pesticide analysis (reduces endrin breakdown to less than 1%).
  • Maximum temperature: 380 °C.

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Hydroguard® Water-Resistant Guard/Retention Gap Columns/Transfer Lines (fused silica)

  • Extend analytical column lifetime by preventing degradation from harsh “steam-cleaning” water injections.
  • Tested with a comprehensive test mix, to ensure high inertness.
  • Maximum temperature: 325 °C.

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Base-Deactivated Guard/Retention Gap Columns (fused silica)

  • Tested with a basic amine test mix.
  • Excellent inertness for basic compounds.
  • Recommended for use with Rtx®-5 Amine, Rtx®-35 Amine, Rtx®-Volatile Amine, and Stabilwax®-DB capillary columns.
  • Batch test chromatogram included.
  • Maximum temperature: 315 °C.

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Polar-Deactivated Guard/Retention Gap Columns (fused silica)

(polar polyethylene glycol deactivation)

  • Tested with a comprehensive test mix to ensure high inertness.
  • Polyethylene glycol deactivation layer provides optimum wettability for polar compounds.
  • Minimize peak splitting when using polar solvents such as methanol or water.
  • Compatible with Stabilwax®, Rtx®-225, and Rt®-2330 capillary columns.
  • Maximum temperature: 280 °C.

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Rt®-βDEXse Columns (fused silica)

(2,3-di-O-ethyl-6-O-tert-butyl dimethylsilyl beta cyclodextrin added into 14% cyanopropylphenyl/86% dimethyl polysiloxane)

Uses: Similar in performance to Rt-βDEXsm but provides better resolution for limonene, linalool, linalyl acetate, ethyl-2-methylbutyrate, 2,3-butane diol, and styrene oxides.

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Rt®-βDEXsm Columns (fused silica)

(2,3-di-O-methyl-6-O-tert-butyl dimethylsilyl beta cyclodextrin added into 14% cyanopropylphenyl/86% dimethyl polysiloxane)

Uses: Excellent column for most chiral compounds in essential oils.

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Rt®-βDEXm Columns (fused silica)

(permethylated beta cyclodextrin added into 14% cyanopropylphenyl/86% dimethyl polysiloxane)

Uses: General-purpose chiral phase with many published applications.

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Rtx®-Dioxin Columns (fused silica)

(proprietary Crossbond® phase)

  • Replacement column for 5% diphenyl phases.
  • Improved separations of dioxin or furan congeners.
  • Greater thermal stability than 5% diphenyl phases or high-cyano confirmation columns.

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Deactivated Fused Silica Tubing (Nonpolar)

  • Useful as guard columns, transfer lines, or long retention gaps
  • Inertness-tested with the Grob test mix includes test chromatogram.
  • 5-meter banded sections mounted in a Restek cage.
  • Maximum temperature: 325 °C.

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Fused Silica Tubing (Undeactivated, Untreated)

  • Strength-tested.
  • Inexpensive.
  • Coiled in 7-inch diameters, banded in 5-meter sections, and mounted in a Restek cage.

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Stx®-CLPesticides Column Kit (0.32mm ID)

(Note: Columns are not preconnected in this kit.)


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Stx®-CLPesticides Column Kit (0.25mm ID)

(Note: Columns are not preconnected in this kit.)


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Stx®-CLPesticides2 Columns (fused silica with Siltek® deactivation)

(proprietary Crossbond® phases)

  • Application-specific columns for organochlorine pesticides and herbicides.
  • Baseline separations in less than 10 minutes.
  • Siltek® surface deactivation enhances responses for endrin, DDT, methoxychlor.
  • Stable to 330 °C.

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Stx®-CLPesticides Columns (fused silica with Siltek® deactivation)

(proprietary Crossbond® phases)

  • Application-specific columns for organochlorine pesticides and herbicides.
  • Baseline separations in less than 10 minutes.
  • Siltek® surface deactivation enhances responses for endrin, DDT, methoxychlor.
  • Stable to 330 °C.

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