General-purpose columns are ideal for GC/MS analysis of chlorinated hydrocarbons, phthalates, phenols, amines, organochlorine pesticides, organophosphorus pesticides, drugs, solvent impurities, and hydrocarbons. •Excellent inertness •General-purpose columns •Ideal for applications requiring high sensitivity •Temperature range: –60 to 330/350 °C (–76 to 626/662 °F) Columns exhibit excellent inertness for active compounds. Columns incorporate phenyl rings in the polymer backbone, improving thermal stability, reducing bleed, and making the phase less prone to oxidation. Ideal for GC/MS applications requiring high sensitivity, including use in ion trap systems.
DiatoSorb Diatomaceous Earth Columns (bonded stationary phase packed columns) • Low bleed levels. • Longer column lifetimes. • Short conditioning times.Bonded phases are used in capillary columns because they provided a dramatic increase in column quality. To truly bridge the gap between traditional packed columns and capillary columns, it was necessary to develop bonded liquid phases for packed columns. Now, packed column chromatographers can expect shorter conditioning times, lower bleed, and longer column lifetimes by using Restek bonded-phase packed columns. Solvent rinsing during the manufacturing process removes low molecular weight polymer fragments that contribute to long conditioning cycle times. Our bonded packings usually stabilize in 30 minutes or less. Because the bleed is lower with bonded phases, detectors can be operated at higher sensitivities and the need for data system bleed compensation is greatly reduced. Bonded phases also last much longer than nonbonded phases. Bonded phases are more resistant to oxidation than nonbonded phases because of the stronger intermolecular forces produced by cross-linking. Because the material is thoroughly cross-linked, the phase will not sag, as often happens with nonbonded phases. These columns are for on-column injections. For not-on-column configuration, add suffix -901. **Siltek treated stainless steel. ***Modified version of DiatoSorb-W; highest inertness, most consistent performance. ****Application specific column.
MXT-Q-BOND Columns (Siltek-treated stainless-steel PLOT) Advantages of metal MXT PLOT columns include: • Can be made in small coil diameters—perfect for tight spaces. • Rugged material withstands rough handling and shock. • Designed for robust performance in process GCs and field instruments. • Available in 3.5"-coil diameter or 7"-diameter, 11-pin cage.
MXT-Alumina BOND/Na2SO4 Columns (Siltek-treated stainless-steel PLOT) Advantages of metal MXT PLOT columns include: • Can be made in small coil diameters—perfect for tight spaces. • Rugged material withstands rough handling and shock. • Designed for robust performance in process GCs and field instruments. • Available in 3.5"-coil diameter or 7"-diameter, 11-pin cage.
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.
DiatoSorb and Chromosorb Diatomaceous Earth Columns (nonbonded stationary phase packed columns)
(nonpolar phase; Crossbond® 100% dimethyl polysiloxane—for simulated distillation) • Application-specific column for simulated distillation. • Stable to 360 °C. The Rtx®-2887 column's stationary phase, column dimensions, and film thickness have been optimized to exceed the resolution and skewing factor requirements specified in ASTM Method D2887. Each column is individually tested to guarantee a stable baseline with low bleed and reproducible retention times. The Crossbond® methyl silicone stationary phase has increased stability compared to packed columns, ensuring stable baselines and shorter conditioning times.
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 G5, G8 and G48 phase.
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.
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 than competitor columns for greater analytical sensitivity. • Exceeds EPA Method 1614 resolution criteria for BDE-49 and BDE-71. • Temperature range: -60 °C to 360 °C.
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.
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.
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.
Stx®-CLPesticides2 (Fused Silica with Siltek® deactivation) •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. Many laboratories analyzing organochlorine pesticides struggle with breakdown and adsorption of endrin, DDT, and methoxychlor caused by active sites throughout the analytical system. Siltek® passivation technology enables these columns to offer unsurpassed inertness and the highest responses for active pesticides. Temperaturgrenze: -60 to 310/330 °C
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. The Rxi®-5Sil MS stationary phase incorporates phenyl groups in the polymer backbone. This improves thermal stability, reduces bleed, and makes the phase less prone to oxidation. Rxi®-5Sil MS columns are ideal for GC-MS applications requiring high sensitivity, including use in ion trap systems.
Micropacked GC Columns • Increased efficiency over traditional packed columns. • Higher capacity than PLOT columns. • Made from inert, flexible Siltek®-treated stainless steel tubing. • Siltek®-treated, braided-wire end plug keeps packing intact, even under intense pressure surges during valve switching. • Wide range of packings available. Efficient, Inert, and Flexible Micropacked columns are highly efficient and provide good sample capacity. With inert Siltek® treatment, micropacked columns are a powerful tool for solving many difficult application problems. The unsurpassed inertness of SilcoSmooth® tubing is based on Siltek® deactivation, which allows the column to be flexed and coiled without any fear of chipping or cracking the inert surface. Easy to Install—Multiple Internal Diameters Our micropacked columns are designed to fit packed and capillary injection systems. Standard wall (1/16-inch OD) micropacked columns offer improved efficiency in packed column instruments without the expense of converting to capillary injection systems. Smaller OD (0.95 mm OD) micropacked columns install easily into a capillary injector, using slightly larger ferrules. Micropacked columns operate at flows exceeding 10 cc/min for trouble-free operation. Braided Wire End Plugs Glass wool end plugs can be dislodged easily by carrier gas pressure surges. Restek’s chemists insert braided wire into the column and secure it by making a small crimp near the column outlet. End plugs are Siltek® treated—the sample contacts only inert surfaces.
MXT®-1 Columns (Siltek®-treated stainless steel) (nonpolar phase; Crossbond® dimethyl polysiloxane) • General-purpose columns for solvent impurities, PCB congeners (e.g., Aroclor mixes), gases, natural gas odorants, sulfur compounds, essential oils, hydrocarbons, semivolatiles, pesticides, and oxygenates. • Temperature range: -60 °C to 430 °C. • Equivalent to USP G1, G2, G38 phases. • 4.5" standard coil diameter. MXT®-1 columns exhibit long lifetime and very low bleed at high operating temperatures. A proprietary synthesis process eliminates residual catalysts that could cause degradation and increase bleed.
Rtx®-35MS—Low-bleed GC/MS Columns (fused silica) (Crossbond® 35% diphenyl/65% dimethyl polysiloxane)
Stx-CLPesticides Columns (fused silica with Siltek deactivation) proprietary Crossbond phase • 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.
Rtx-200 columns have accomplished many difficult separations. The trifluoropropylmethyl polysiloxane stationary phase has a unique selectivity that changes elution orders and resolves compounds that phenyl, cyano, or carbowax phases can not. These columns offer exceptional thermal stability, low bleed, and superior inertness - even for active compounds such as phenols, and with sensitive detectors such as ECDs, NPDs, and MSDs. •Equivalent to USP G6 phase 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.
(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. • Stable to 340 °C.
Packed Column 2.1% Carbowax 1540 Porasil C 80/100 2 2mmID/Silco/ NOC/AC
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. Temp. limits 40 to 230 °C
(permethylated beta cyclodextrin added into 14% cyanopropylphenyl/ 86% dimethyl polysiloxane) Uses: General-purpose chiral phase with many published applications.temp. Limits 40 to 230 °C
MXT®-2887 Column (Siltek®-treated stainless steel) (nonpolar phase; Crossbond® 100% dimethyl polysiloxane—for simulated distillation) • Application-specific columns for simulated distillation. • Stable to 400 °C. • 4.5" standard coil diameter. MXT®-2887 columns’ stationary phase, column dimensions, and film thicknesses have been optimized to exceed the resolution and skewing factor requirements specified in ASTM Method D2887. Each column is individually tested to guarantee a stable baseline with low bleed and reproducible retention times. The Crossbond® methyl silicone stationary phase has increased stability compared to packed columns, ensuring stable baselines and shorter conditioning times. Manufactured from Siltek®-treated stainless steel tubing, MXT® columns are the most durable high temperature GC columns available.
Rtx-2330 Cap. Column 60m, 0.25mm ID, 0.10um For use with Dioxins
MXT-Biodiesel TG Columns (Siltek-treated stainless steel) • Fast analysis times and sharp mono-, di-, and triglyceride peaks. • Temperature range: -60 to 430 °C
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. • Column specifically tested for low-bleed performance. • Temperature range: -60 °C to 350 °C. • Equivalent to USP G27 and G36 phases.
Rxi®-1HT Columns (fused silica) (nonpolar phase; dimethyl polysiloxane) • 40% longer lifetime from specially designed fused silica tubing. • Columns processed for high-temperature applications, such as high molecular weight hydrocarbons. • Temperature range: -60 to 400 °C.
(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. • Stable to 340 °C.
CarboBlack Packed Columns (On CarboBlack B) Graphitized carbon black offers unique selectivity and very little adsorption for alcohol analyses. Two types of CarboBlack supports are available, CarboBlack B and CarboBlack C. CarboBlack B support, with its higher surface area, can hold up to a 10% loading of a nonsilicone liquid phase. CarboBlack C support can hold up to a 1% loading of a nonsilicone liquid phase. Many Carbowax® 20M-loaded CarboBlack packings are available. CarboBlack packings are treated with KOH or picric acid for basic or acidic compounds, and special alcoholic beverage loadings are available. CarboBlack supports provide resolution and retention similar to Carbopack™ and Carbograph supports. Siltek treated stainless steel.
OPN on Res-Sil C Column (packed) This column separates the light hydrocarbons, and baseline resolves cis-2-butene from 1,3-butadiene. SilcoSmooth Tubing.
Rtx-VMS Columns (fused silica) proprietary Crossbond phase • Unique, proprietary polymer designed for excellent retention and better separation of volatile organic compounds. • Application-specific columns ideal for analyzing volatile organic pollutants by GC-MS including methods TO-15, EPA 524, EPA 8260, trimethylsilanol, cleaning solvents, and e-cigarette vapor. • Complete separation of U.S. EPA Method 8260 compounds in less than 10 minutes. • Temperature range: -40 °C to 260 °C.
Rtx®-1PONA (fused silica) nonpolar phase; Crossbond® 100% dimethyl polysiloxane • Application-specific columns meet ASTM and CGSB requirements for detailed hydrocarbon analysis. • Stable to 340°C. Similar phases: Petrocol DH, DB-Petro, HP-PONA
Rtx-VMS Columns (fused silica) proprietary Crossbond phase • Unique, proprietary polymer designed for excellent retention and better separation of volatile organic compounds. • Application-specific columns ideal for analyzing volatile organic pollutants by GC-MS including methods TO-15, EPA 524, EPA 8260, trimethylsilanol, cleaning solvents, and e-cigarette vapor. • Complete separation of U.S. EPA Method 8260 compounds in less than 10 minutes. • Temperature range: -40 °C to 260 °C.
MXT®-1301 Columns (Siltek®-treated stainless steel) (low- to midpolarity phase) • General-purpose columns for residual solvents, alcohols, oxygenates, and volatile organic compounds. • Temperature range: -20 °C to 280 °C. • Equivalent to USP G43 phase. • 4.5" standard coil diameter.
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. The elution order of polyunsaturated FAMEs on FAMEWAX columns is comparable tothat on other Carbowax® columns, but baseline resolution is achieved in significantly less time.
Rxi®-5HT Columns (fused silica) (low-polarity phase; diphenyl dimethyl polysiloxane) • 40% longer lifetime from specially designed fused silica tubing. • Columns processed for high-temperature applications, such as mineral oil. • Temperature range: -60 to 400 °C.
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. • Column specifically tested for low-bleed performance. • Temperature range: -60 °C to 350 °C. • Equivalent to USP G27 and G36 phases.
MXT®-1301 Columns (Siltek®-treated stainless steel) (low- to midpolarity phase) • General-purpose columns for residual solvents, alcohols, oxygenates, and volatile organic compounds. • Temperature range: -20 °C to 280 °C. • Equivalent to USP G43 phase. • 4.5" standard coil diameter.
Packed Column Chromosorb PAW 60/80 3 2mmID Silco NOC/AC
Rt®-Q-BOND Columns (fused silica PLOT) 100% divinylbenzene • Nonpolar PLOT column incorporating 100% divinylbenzene. • Excellent for analysis of C1 to C3 isomers and alkanes up to C12. • High retention for CO2 simplifies gas analysis; CO2 and methane separated from O2/N2/CO. (Note: O2/N2/CO not separated at room temperature.) • Use for analysis of oxygenated compounds and solvents. • Maximum temperature of 300 °C.
Micropacked GC Columns • Increased efficiency over traditional packed columns. • Higher capacity than PLOT columns. • Made from inert, flexible Siltek®-treated stainless steel tubing. • Siltek®-treated, braided-wire end plug keeps packing intact, even under intense pressure surges during valve switching. • Wide range of packings available. Efficient, Inert, and Flexible Micropacked columns are highly efficient and provide good sample capacity. With inert Siltek® treatment, micropacked columns are a powerful tool for solving many difficult application problems. The unsurpassed inertness of SilcoSmooth® tubing is based on Siltek® deactivation, which allows the column to be flexed and coiled without any fear of chipping or cracking the inert surface. Easy to Install—Multiple Internal Diameters Our micropacked columns are designed to fit packed and capillary injection systems. Standard wall (1/16-inch OD) micropacked columns offer improved efficiency in packed column instruments without the expense of converting to capillary injection systems. Smaller OD (0.95 mm OD) micropacked columns install easily into a capillary injector, using slightly larger ferrules. Micropacked columns operate at flows exceeding 10 cc/min for trouble-free operation. Braided Wire End Plugs Glass wool end plugs can be dislodged easily by carrier gas pressure surges. Restek’s chemists insert braided wire into the column and secure it by making a small crimp near the column outlet. End plugs are Siltek® treated—the sample contacts only inert surfaces.
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 °C to 250 °C.
Rtx-2887 Cap. Column 10m, 0.53mm ID, 2.65um with 5m Integra-Guard Column
(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. • Long lifetime and very low bleed at high operating temperatures. • Temperature range: -60 °C to 350 °C. • Equivalent to USP G1, G2, G38 phases.
Rtx-CLP Cap. Column Kit0.53mm ID 11140/11340/10045 w/Angled Y Presstight
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. Active basic compounds that otherwise require derivatization, or an alternative analytical technique, can be analyzed on an Rtx®-5 Amine column. The tubing surface is chemically altered to reduce tailing of basic compounds, eliminating the need for column priming. An Rtx®-5 Amine column is ideal for analyzing a wide variety of basic compounds, but breakthrough technology also allows the analysis of neutral compounds, adsorptive compounds with oxygen groups susceptible to hydrogen bonding, or even weakly acidic compounds such as phenols. Every Rtx®-5 Amine column is tested to ensure that it exceeds the requirements for analyzing ppm levels of amines, without priming, and to ensure low bleed at maximum operating temperature.
Rtx®-624 Columns (fused silica) (low- to midpolarity phase) • 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. The unique polarity of the Rtx®-624 column makes it ideal for analyzing volatile organic pollutants. Although the Rtx®-502.2 column is recommended in many methods, the Rtx®-624 column offers better resolution of early eluting compounds. The Rtx®-624 phase produces greater than 90% resolution of the first six gases in EPA Methods 8260 and 524.2. This stationary phase is especially well-suited for EPA Method 524.2 since it resolves 2-nitropropane from 1,1-dichloropropanone, which share quantification ion m/z 43 and must be separated chromatographically.
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