Rtx-50 Columns (fused silica) midpolarity phase; Crossbond phenyl methyl polysiloxane • General-purpose columns for pesticides, herbicides, and phthalate esters. • Equivalent to USP G3 phase. • Temperature range: 40 °C to 330 °C.
Porous Polymer Columns (packed) 80/100 Mesh. Siltek treated stainless steel.
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.
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.
(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. Many analysts feel the Rtx®-1301 column has the best cyanosiloxane bonded stationary phase available, with no other column manufacturer providing lower bleed, longer lifetime, or better inertness. Our polymer is fully characterized to ensure long-term reproducibility, column-to-column consistency, and low bleed—even with sensitive detectors such as ECDs and MSDs.
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.
Rt®-Alumina BOND/KCl Columns (fused silica PLOT) (KCl deactivation) • Restek’s lowest polarity alumina column. • Low moisture sensitivity reduces the need for frequent regeneration. • Acetylene elutes before n-butane. • Methyl acetylene (impurity in 1,3-butadiene) elutes before 1,3-butadiene. • Stable to 200 °C. No guarantee for loose particles Non-returnable/Non-refundable
Rtx-5 PONA Tuning Column 5m, 0.25mm ID, 1.0um
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. • Equivalent to USP G6 phase.
Stabilwax-MS column For HP 6850 GCs
(midpolarity Crossbond® phase) • General-purpose columns for alcohols, oxygenates, PCB congeners (e.g., Aroclor mixes), pesticides, and fragrance compounds. • Temperature range: -20 °C to 280 °C. • Equivalent to USP G46 phase. Rtx®-1701 is one of the more popular stationary phases used in capillary GC. The mix of cyano and phenyl functional groups increases the polarity and offers a different elution order relative to less polar Rtx®-1 or Rtx®-5 columns. An Rtx®-1701 column is ideal for confirmation analysis in combination with an Rtx®-35 or Rtx®-5 column. The polymer is fully characterized to ensure long-term reproducibility, column-to-column consistency, and low bleed, even with sensitive detectors such as ECDs and MSDs.
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.
• Application-specific columns for organophosphorus pesticides; best column combination for U.S. EPA Method 8141. • Low bleed—ideal for GC-FPD, GC-NPD, or GC-MS analyses. • Stable to 330 °C. Using sophisticated computer modeling software, we created two stationary phases for separating the 53 organophosphorus pesticides (OPP) listed in EPA Method 8141. Separation is improved and analysis time is significantly reduced, compared to other columns. The extended upper temperature limit of these phases (330 °C) allows analysts to bake out high molecular weight contamination typically associated with pesticide samples. The low-bleed columns are a perfect match for sensitive detection systems.
Stabilwax® Columns (fused silica) (polar phase; Crossbond® polyethylene glycol) • Rugged enough to withstand repeated water injections. • Low-bleed PEG column ensures long column lifetimes. • Temperature range: 40 °C to 260 °C. • Equivalent to USP G14, G15, G16, G20, and G39 phases. Restek’s polar-deactivated surface tightly binds the Carbowax® polymer and increases thermal stability, relative to competitive columns. Because of the increased stability produced by the bonding process, Stabilwax® columns exhibit long column lifetimes, even when programming repeatedly up to 260 °C. The bonding mechanism of the column also produces polar compound retention times that do not shift, as is often observed on other wax-type columns. In addition, this bonding mechanism produces a column that can be rejuvenated by solvent washing. Stabilwax® columns are used for a wide range of compounds and matrices including: FAMEs, flavor compounds, essential oils, solvents, aromatics (including xylene isomers), acrolein/acrylonitrile (EPA 603), and oxygenated compounds. Also used for purity testing of chemicals and analyzing impurities in water matrices and alcoholic beverages.
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.
Sulfinert PE900-3920 NOC Column Does Not Include Ferrules and Nuts Installation Kits Ordered Separately
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.
Stx-CLPesticides Cap. Column Kit, 0.32 mm ID, Kit Includes 11546/11444/10027, 20403 Universal Y Press-Tight
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.
MXT-35 Columns (Siltek-treated stainless steel) midpolarity phase; Crossbond diphenyl dimethyl polysiloxane • General-purpose columns for organochlorine pesticides, PCB congeners (e.g. Aroclor mixes), herbicides, pharmaceuticals, sterols, rosin acids, and phthalate esters. • Temperature range: 0 °C to 340 °C. • Equivalent to USP G42 phase.
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.
DiatoSorb Diatomaceous Earth Columns (bonded stationary phase packed columns) • Low bleed levels. • Longer column lifetimes. • Short conditioning times.
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®-17 Columns (fused silica) (midpolarity phase; Crossbond® diphenyl dimethyl polysiloxane) • General-purpose columns for pesticides, herbicides, rosin acids, phthalate esters, triglycerides, sterols. • Temperature range: 40 °C to 320 °C.
Rtx®-CLPesticides Columns (fused silica) (proprietary Crossbond® phases). • Application-specific columns for organochlorine pesticides and herbicides. • Low bleed—ideal for high sensitivity 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 changes.
(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®-5 (G27) Columns (fused silica) (low-polar Rtx®-5 Structure ity 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. The diphenyl dimethyl polysiloxane stationary phase is the most popular GC stationary phase and is used in a wide variety of applications. All residual catalysts and low molecular weight fragments are removed from the Rtx®-5 polymer, providing a tight monomodal distribution and extremely low bleed.
Rxi-1301Sil MS Columns (fused silica) midpolarity Crossbond phase • Highest thermal stability in the industry ensures dependable, accurate MS results and increased uptime. • Stabilized cyano phase selectivity improves the performance of existing methods. Ideal for terpenes, glycol ethers, fusel alcohols, and other polar compounds. • Rigorous QC testing ensures inertness and accurate, reliable data for multiple compound classes. • Temperature range: -60 °C to 320 °C.
Bonded Packed Column Stationary Phases •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 non-bonded phases. Bonded phases are more resistant to oxidation than non-bonded 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 non-bonded phases. These columns are for on-column injections. For not-on-column configuration, add suffix -901. **Siltek treated stainless steel. ***Application specific column.
Rxi®-PAH Columns (fused silica) (midpolarity proprietary phase) • Ideal for EFSA PAH4 analysis—separates all priority compounds: benz[a] anthracene, chrysene, benzo[b]fluoranthene, and benzo[a]pyrene. • Best resolution of chrysene from interfering PAHs, triphenylene, and cyclopenta[cd]pyrene. • Complete separation of benzo [b], [k], [ j], and [a] fluoranthenes. • 360 °C thermal stability allows analysis of low volatility dibenzo pyrenes. The Rxi®-PAH GC columns were designed by Restek with a higher phenyl-content stationary phase that provides unique selectivity to separate important polycyclic aromatic hydrocarbons (PAH) for food safety that cannot be distinguished by mass spectrometry. Even difficult priority compounds, such as the European Food Safety Authority (EFSA) PAH4, are easily separated and accurately quantified—results that cannot be achieved on typical GC columns. Arylene modification and surface bonding of the stationary phase increase thermal stability and ruggedness so relatively nonvolatile, higher molecular weight PAHs can be analyzed routinely without interference from column bleed. Excellent column efficiency means that the column can be trimmed for maintenance purposes many times without losing critical PAH separations, including those that are part of environmental methods, as well as food safety testing. The selectivity and efficiency of the Rxi®-PAH column make it ideal for EFSA PAH4 analysis; chrysene/triphenylene separation and resolution of all benzofluoranthenes are easily achieved.
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.
Rt-Alumina BOND/MAPD Columns (fused silica PLOT) • Optimized deactivation produces maximum response when analyzing trace levels of acetylene, methyl acetylene, and propadiene. • Stable response factors make this column ideal for process-type applications where recalibration must be minimized. • High loadability reduces peak tailing and improves separations. • Extended temperature range up to 250 °C for fast elution of high molecular weight (HMW) hydrocarbons and accelerated column regeneration following exposure to water. • Temperature range: -60 to 250 °C. Rt-Alumina BOND/MAPD PLOT columns are made specifically for the analysis of petrochemicals and downstream products such as ethylene, propylene, butylenes, and butadiene.
Rt-S-BOND Columns (fused silica PLOT) porous divinylbenzene homopolymer •Midpolarity porous polymer PLOT column, incorporating high 4-vinylpyridine. •Use for the analysis of nonpolar and polar compounds. •Temperature range: -60 to 250 °C
• 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. • Stable to 260 °C. These application-specific columns for blood alcohol analysis baseline separate all critical compounds—including ethanol, methanol, acetone, tert-butanol, acetaldehyde, isopropanol, and n-propanol—in less than 2 minutes. Every Rtx®-BAC Plus 1 and Rtx®-BAC Plus 2 column is qualified with a test mix containing these important BAC target compounds to ensure reproducibility. These columns baseline separate all blood alcohol compounds in blood, breath, or urine, in less than 2 minutes, under isothermal conditions. Isothermal analysis increases productivity by eliminating the need for oven cycling. Confirmation is easily achieved with this tandem set because there are two elution order changes between the columns.
DiatoSorb and Chromosorb Diatomaceous Earth Columns (nonbonded stationary phase packed columns) Restek has replaced Chromosorb W with DiatoSorb-W diatomaceous earth as the solid support material in its packed column line. Silcoport W is now made with Diatosorb-W.
MXT-20 Columns (Siltek-treated stainless steel) low- to midpolarity phase; Crossbond diphenyl dimethyl polysiloxane • General-purpose columns for volatile compounds, flavor compounds, and alcoholic beverages. • Temperature range: -20 °C to 340 °C. • Equivalent to USP G28, G32 phases.
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.
(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.
Rt-QS-BOND Columns (fused silica PLOT) porous divinylbenzene homopolymer • Intermediate polarity porous polymer PLOT column incorporating low 4-vinylpyridine. • Separates ethane, ethylene, and acetylene to baseline. • Temperature range: -60 to 250 °C.
Rtx®-5 (G27) Columns (fused silica) (low-polar Rtx®-5 Structure ity 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. The diphenyl dimethyl polysiloxane stationary phase is the most popular GC stationary phase and is used in a wide variety of applications. All residual catalysts and low molecular weight fragments are removed from the Rtx®-5 polymer, providing a tight monomodal distribution and extremely low bleed.
Rtx-Volatiles Columns (fused silica) proprietary Crossbond diphenyl/dimethyl polysiloxane phase • Application-specific columns for volatile organic compounds. • Can be used for alcohols and solvents. • Temperature range: -20 °C to 280 °C.
Stabilwax® Columns (fused silica) (polar phase; Crossbond® polyethylene glycol) • Rugged enough to withstand repeated water injections. • Low-bleed PEG column ensures long column lifetimes. • Temperature range: 40 °C to 260 °C. • Equivalent to USP G14, G15, G16, G20, and G39 phases. Restek’s polar-deactivated surface tightly binds the Carbowax® polymer and increases thermal stability, relative to competitive columns. Because of the increased stability produced by the bonding process, Stabilwax® columns exhibit long column lifetimes, even when programming repeatedly up to 260 °C. The bonding mechanism of the column also produces polar compound retention times that do not shift, as is often observed on other wax-type columns. In addition, this bonding mechanism produces a column that can be rejuvenated by solvent washing. Stabilwax® columns are used for a wide range of compounds and matrices including: FAMEs, flavor compounds, essential oils, solvents, aromatics (including xylene isomers), acrolein/acrylonitrile (EPA 603), and oxygenated compounds. Also used for purity testing of chemicals and analyzing impurities in water matrices and alcoholic beverages.
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.
Rtx-TNT1 Cap. Column 6m, 0.53mm ID, 1.5um Sold as 3-pk only
Rtx-50 Columns (fused silica) midpolarity phase; Crossbond phenyl methyl polysiloxane • General-purpose columns for pesticides, herbicides, and phthalate esters. • Equivalent to USP G3 phase. • Temperature range: 40 °C to 330 °C.
Packed Column, 5% Rt-1200 1.75% Bentone 34 Silcoport W 100/120 2m, 2mmID
Stx-CLPesticides Cap. Column Kit, 0.25 mm ID, Kit includes 11543/11443 /10026 With Angled Y Press-Tight Connector
CarboBlack Columns (packed) On CarboBlack B • Graphitized carbon black offers unique selectivity and very little adsorption for alcohol analyses. • CarboBlack B support, with its higher surface area, can hold up to a 10% loading of a nonsilicone liquid phase. • CarboBlack supports provide resolution and retention similar to Carbopack and Carbograph supports.
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