Petrochemical & Chemical Chromatography

Proven, Integrated Solutions & Veteran Expertise

  • We support the most ASTM petrochemical methods in the chromatography industry.
  • Our integrated petroleum solutions include columns, standards, accessories, method-compliant applications, and resources.
  • Restek's in-house experts put decades of field and lab experience at your service.

Petrochemical and chemical analyses are both demanding and time sensitive. Delays of only a few hours can carry a huge cost, so it is crucial that your instruments keep generating fast, accurate results. Your ideal partner should not only understand the stress and importance of what you do but also have the products and support to help simplify your daily routine. Your ideal partner in the petroleum industry is Restek Pure Chromatography.

We have a full line of integrated solutions for the most widely used ASTM methods covering refining, petrochemical, and chemical applications. Turn to us for inert capillary and packed GC columns (including our Alumina BOND/MAPD PLOT columns), reference standards, and accessories as well as the applications and resources to use them to your full advantage. Every product we sell for the petroleum market is vetted by our in-house experts for quality and reliability before we offer it to you—and those same industry veterans are available to help you get the most out of your analyses.

From the tanker to the refinery to the petrochemical plant, Restek is your first and best supplier for chromatography supplies, applications, and education. We support simulated distillation (SimDist) and detailed hydrocarbon analysis (DHA), as well as the analysis of gasoline, biodiesel, natural gas, refinery gas, impurities, and more. Look through this site and then call us to start turning petroleum samples around faster and more smoothly.


Restek has a world-class team of petroleum professionals. Feel free to contact our in-house experts any time you need help working through an analytical challenge. You can also contact your local Restek representative to arrange custom, on-site training.

Jan Pijpelink Jan Pijpelink
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Jaap de Zeeuw Jaap de Zeeuw
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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.

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-1HT SimDist Column (Siltek-treated stainless steel)

nonpolar phase

  • Lowest bleed for longest column lifetime.
  • Reliably meets all ASTM D2887, D6352, D7169, D7213, and D7500 specifications.
  • 100% dimethyl polysiloxane phase allows easy comparisons to historical data.
  • Individually tested for guaranteed performance.
  • 7" coil diameter.
  • Temperature range: -60 to 450 °C*
*Maximum temperature varies by cat.#; see column-specific temperatures.

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.
  • Stable to 340 °C.

D3606 Application Column Set (packed, 2 column set)

  • Complete resolution of benzene from ethanol—no compromising coelutions.
  • Accurate quantification of benzene and toluene.
  • Column sets are individually tested for method applicability.
  • Listed in the appendix of ASTM Method D3606 as an acceptable alternative to TCEP columns—get better separation of benzene and ethanol while still following ASTM method requirements.

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.
  • Long lifetime and very low bleed at high operating temperatures.
  • Equivalent to USP G1, G2, G38 phases.
  • Some dimensions also available as Integra-Guard columns — a guard and analytical column in one to eliminate connection problems!

MXT-Biodiesel TG Columns (Siltek-treated stainless steel)

  • Fast analysis times and sharp mono-, di-, and triglyceride peaks.
  • Stable at 430 °C for reliable, consistent performance.

Rtx-Biodiesel TG Columns (fused silica)

  • Linearity for all reference compounds exceeds method requirements.
  • Columns with retention gaps feature SilTite μ-Union connectors for a permanent, leak-tight connection.
  • Low column bleed at high temperatures.
  • For glycerin and glycerides analysis, according to ASTM D6584 and EN 14105 methods.
  • Stable to 380 °C.

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.*

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-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.
  • Temperature range: -60 to 200 °C.

MXT-Msieve 5A 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.*

DiatoSorb Diatomaceous Earth Columns (bonded stationary phase packed columns)

  • Low bleed levels.
  • Longer column lifetimes.
  • Short conditioning times.

Molesieve Micropacked GC Columns

  • Increased efficiency over traditional packed columns.
  • Higher capacity than PLOT columns.
  • Made from inert, flexible SilcoSmooth tubing.
  • Wide range of packings available.
  • Standard coils fit all instruments. No special instrument configurations required.

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 solvents, glycols, and other polar compounds.
  • Rigorous QC testing ensures inertness and accurate, reliable data for multiple compound classes.
  • Maximum temperature: 320 °C.

Reference Standards

Standards for ASTM Method D2887

SimDist reference standards to support ASTM D2887—Standard Test Method for Boiling Range Distribution of Petroleum Fractions by Gas Chromatography (C5–C44)—and other simulated distillation (SimDist) methods

Standards for ASTM Method D6730

Reference standards to support ASTM D6730—Standard Test Method for Determination of Individual Components in Spark Ignition Engine Fuels by 100-Meter Capillary (with pre-column) High-Resolution Gas Chromatography—as well as ASTM D5134, D5501, D6729, D6733, and otherdetailed hydrocarbon analysis (DHA) methods

Standards for ASTM Method D3606

Reference standards to support ASTM D3606—Standard Test Method for Determination of Benzene and Toluene in Finished Motor and Aviation Gasoline by Gas Chromatography

Standards for Other ASTM Methods

Reference standards to support ASTM D6352, D6584, D3710 (to be withdrawn in 2014), and more

Polywax Standards

Supports ASTM Methods D2887, D6352, D7169, D7398, and D7500.

These high molecular weight hydrocarbon waxes are useful for simulated distillation and other high-temperature GC work.

Refinery Gas Calibration Standards

Gas standards to support ASTM D2163, D2593, D2712, and D6159

Natural Gas Calibration Standards

Gas standards to support ASTM D1945

Airgas Transportable Pure Gases and Mixtures in 14 L, 48 L, and 110 L Sizes

We offer a wide range of Airgas (formerly Scott/Air Liquide gas) transportable gases, from pure gases for purging or calibrating to multicomponent mixes, which are ideal for peak identification work.

Note: Actual cylinder pressure may vary due to loss from quality testing procedure.

Sulfur Standards

Sulfur-containing reference standards to support simulated distillation (SimDist) analyses

Supplies & Accessories

Gas Purification Accessories

A full selection of gas filter kits, hydrocarbon and other traps, valves, gauges, and more for petroleum and petrochemical analyses.

Restek ProFLOW 6000 Electronic Flowmeter

Flowmeters that can measure flammable gases are becoming mandatory due to the increased use of hydrogen in chromatography. With its Ex rating, the Restek ProFLOW 6000 meter is designed specifically with explosive and flammable gases in mind.

The Restek ProFLOW 6000 is the only flowmeter you need for any type of chromatography gas measurement because of its wide range of capabilities. The ProFLOW 6000 is an electronic meter capable of measuring volumetric flow for most gases. Real-time measurements can be made for various types of flow paths, including continually changing gas types. This portable unit is designed for easy handheld use, and the stand adds benchtop convenience.

Restek Electronic Leak Detector

New and improved! Prevent small leaks from causing big problems with a Restek leak detector.

  • Detects a broad range of gases and indicates leak severity with both an LED display and audible tone.
  • No more waiting for a full charge—can be operated during charging or used up to 12 hours between charges.
  • Charging kit includes both universal AC power adaptor and USB charging cable so you can charge anywhere, anytime.
  • Pinpoint very small gas leaks quickly and accurately before they cause damage and downtime.
  • Compact, handheld unit is easy to operate and convenient to use anywhere you need to check for leaks.

Packed Column Inlet Adaptor Kit for 1/4" Injection Ports

  • Use 1/8" and 3/16" OD columns in 1/4" on-column injection ports.
  • Centers column perfectly in injection port to eliminate bent syringe needles.
  • Slotted design prevents carrier gas occlusion.
  • Vespel/graphite reducing ferrules make installation easy.
  • Includes all nuts & ferrules used to attach tubing to the injector or detector.

Micropacked Inlet Conversion Kits

  • Convert a capillary GC split/splitless inlet for use with 1/16" OD micropacked columns.
  • For use with Agilent 5890, 6890, and 7890 GCs.
  • Sample pathways deactivated for ultimate inertness.

GC Fittings

Fitting kits, nuts, tees, unions, plugs, reducers, connectors, and other hardware needed for your GC in stainless steel, brass, and Siltek/Sulfinert or Silcosteel-CR treatment


Autosampler and manual syringes as well as replacement needles, plungers, and O-rings

Sample Handling

Gas Sampling Valves & Loops

Add gas sampling valves and loops, replacement rotors, syringes, and syringe O-rings to your order for convenient one-stop shopping. Sulfinert treatment is ideal for low concentrations of sulfur and more.

Sample Cylinders

We offer a wide range of high-pressure or ultra-high pressure stainless steel sample cylinders, with or without Sulfinert treatment. TPED-compliant cylinders available for EU community.

Sample Cylinder Valves & Accessories

Restek has caps, plugs, rupture disks, handles, tees, valves, and more for your sample cylinders. Choose Sulfinert treatment to eliminate active sites for better recovery of active compounds.


Accurate Analysis of Glycerol and Glycerides in Biodiesel Oil Using EN 14105 (2011) and Robust Metal MXT Columns

The high temperatures required to analyze glycerol and glycerides as contaminants in biodiesel can result in shorter column lifetimes and more instrument downtime. Metal MXT-Biodiesel TG columns are more durable and last longer than their fused silica column counterparts, making them a better choice for labs wanting to minimize downtime. As demonstrated here, MXT-Biodiesel columns meet method EN 14105 (2011) performance requirements and provide excellent chromatographic results for biodiesel testing.

Featured Application: Volatile Amines on Rtx-Volatile Amine - Robust GC Analysis of Volatile Amines on the Rtx-Volatile Amine Column

Restek’s Rtx-Volatile Amine column is specifically designed for GC analysis of volatile amines in challenging matrices. The stable bonded phase is highly retentive and selective for volatile amines to ensure good chromatographic separations and peak shapes. In addition, the column is very robust and able to withstand repeated exposure to harsh sample matrices, such as water.

Analysis of Biodiesel Fatty Acid Methyl Esters (FAME) in Aviation Jet Fuels Using Method IP 585

Accurate analysis of biodiesel FAME in jet fuel is critical for ensuring that contamination levels do not exceed allowable limits. Method IP 585 is commonly used for this analysis and here we perform the method using a Stabilwax column and GC-MS in SIM mode. Method calibration curve criteria were met and good recoveries of the total FAME content in jet fuel were obtained.

DiatoSorb-W Diatomaceous Earth: Great Chromatography Millions of Years in the Making

Virtually unlimited in supply—but only available from Restek—new DiatoSorb-W diatomaceous earth offers a reliable alternative for packed column users. After years of dealing with supply shortages and inconsistent product quality, analysts who depend on diatomaceous earth columns now have a reliable new source. Restek now uses DiatoSorb-W as the exclusive replacement to the diatomaceous earth that was previously used in our standard and Silcoport W GC packed columns lines. All DiatoSorb-W material undergoes rigorous quality testing to ensure high purity and dependable performance. DiatoSorb-W material is available in acid-washed (WAW), non-acid washed (WNAW), and high-performance (WHP) varieties.

Using Alternative Carrier Gases with Accelerated ASTM D2887 Simulated Distillation Analysis

ASTM Method D2887 now allows for alternate carrier gases, so hydrogen or nitrogen can replace helium carrier gas for simulated distillation. Here, we show that with an MXT-1HT SimDist column and Restek’s EZGC online method translator existing methods using helium can be easily converted to either hydrogen or nitrogen carrier gas. Because retention times are preserved with proper method translation, there are minimal changes to peak identification tables which significantly simplifies method validation.

Alternative Carrier Gases for ASTM D7213 Simulated Distillation Analysis

Carrier gas changes for SimDist methods, such as ASTM Method D7213, can be easily implemented in your daily process. Using MXT-1HT SimDist columns and EZGC method translation software, helium-based SimDist methods can be easily translated to alternative carrier gases while maintaining ASTM Method D7213 requirements.

ASTM Petrochemical Method Chromatography Product Guide

Restek is your ideal partner for integrated petrochemical solutions, and our ASTM method product guide will help you quickly pick the right GC columns and reference standards for SimDist, DHA, finished gasoline, and other common petroleum analyses.

Benefits and Considerations of Converting to Hydrogen Carrier Gas

The current helium shortage has severely impacted gas chromatographers who are finding that helium has become significantly more expensive and is not always available when needed. This article explores the benefits and considerations of replacing helium with hydrogen carrier gas.

Fingerprinting Crude Oils and Tarballs using Biomarkers and Comprehensive Two-Dimensional Gas Chromatography

Comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry (GCxGC-TOFMS) was used to analyze petroleum biomarkers creating unique fingerprints of crude oil samples and tarballs collected after the Deepwater Horizon oil spill.

Using Micropacked GC Columns for Analyzing Volatiles in Light Hydrocarbon Streams

Most analysts still use traditional packed columns for light hydrocarbon analysis, but many adsorbents are also available in micropacked column formats. Micropacked columns are a good alternative when both efficiency and sample loadability are desired.

Advanced Capillary Column Technology Improves Analysis of Volatile Amines

Volatile amines, such as monomethylamine, diethylamine, and triethylamine, are widely used in the petrochemical industry, but are prone to poor peak shape and difficult to analyze. Low levels of volatile amines can now be accurately reported using new Rtx-Volatile Amine columns due to high column inertness.

Protect Natural Gas Sample Integrity and Prevent Sulfur Loss with Sulfinert Sample Cylinders

Sulfur compounds in fuel streams can damage equipment and reduce BTU values. Sulfinert sample cylinders are significantly more inert than stainless steel cylinders and assure sample integrity during collection, transportation, and storage.

Extending the Power of Stabilized PLOT Column Technology to Process GC Analyzers

New metal MXT PLOT columns offer greater stability than conventional PLOT columns, making them a better choice for process GC analyzer applications. New bonding techniques result in highly reproducible flow characteristics, improved layer stability, and excellent separation efficiencies.

Analyze ppb Level Sulfur Compounds Using an Rt-XLSulfur Micropacked GC Column or an Rtx-1 Thick Film Capillary GC Column

Trace levels of sulfur compounds are separated and quantified by using an Rtx-1 capillary column or an Rt-XLSulfur micropacked column. The latter column is a specially deactivated porous polymer in Sulfinert-passivated stainless steel tubing.

Rt-XLSulfur Packed GC Column for Analysis of Low-Level Sulfur Compounds in C1-C6 Hydrocarbon Streams

Rt-XLSulfur columns resolve hydrocarbons from sulfur compounds in hydrocarbon process streams and exhibit excellent inertness with low ppbv levels of sulfurs.

Improve Trace Analysis of Acetylene, Propadiene, and Methyl Acetylene Impurities With Higher Sample Capacity Alumina MAPD Columns

Rt-Alumina BOND/MAPD columns offer higher capacity than other MAPD columns and are ideal for analyzing acetylene, propadiene, and methyl acetylene in petroleum gases. Greater capacity improves data accuracy due to better peak symmetry and a wide linear range.

Analysis of Trace Hydrocarbon Impurities in 1,3-Butadiene Using Optimized Rt-Alumina BOND/MAPD PLOT Columns

Impurity analysis of 1,3-butadiene on an Rt-Alumina BOND/MAPD column results in good separation of both light polar impurities (methyl acetylene, propadiene) and 4-vinylcyclohexene, a heavier contaminant that often requires testing on a second column.

GCxGC Analysis of Complex Petroleum Hydrocarbons: Sulfur Speciation in Diesel

Comprehensive 2D GC, also known as GCxGC, is a powerful technique with a great deal of potential for improving separations of complex petroleum and petrochemical samples that contain hundreds—or even thousands—of components. While GCxGC is still considered emerging technology and is used primarily in research and development labs, it has undergone significant growth in the past few years.

New Alumina Column Shows Promise for Analyzing Chlorofluorocarbons

Rt-Alumina BOND/CFC columns provide high retention and high selectivity for volatile halogenated hydrocarbons, without the activity that is usually observed with alumina adsorbents. Chlorofluorocarbon analysis, in particular, can benefit from this new technology.

Stable Sulfur & Mercury Sampling in Refineries - Using Siltek and Sulfinert Surface Treated Components

Refinery and natural gas samples often contain trace amounts of sulfur- and mercury-containing compounds, which can interfere with reactions, poison catalysts in petrochemical processes, and damage equipment. Because these compounds quickly react with stainless steel surfaces, accurate determination of these compounds is impossible when samples are collected and stored in untreated sample cylinders. Restek's Siltek and Sulfinert passivation techniques bond an inert layer into the surface of stainless steel, preventing active compounds from reacting with or adsorbing to the steel.

Solutions for Gas Sampling

Restek offers an expansive line of Sulfinert-treated sample cylinders, valves, and accessories. (PDF - 0MB)

Analyze Trace Polar Hydrocarbons More Accurately and Reliably With New Alumina BOND/MAPD PLOT Columns!

Rt- and MXT-Alumina BOND/MAPD PLOT columns outperform other MAPD columns for trace analysis of methyl acetylene, acetylene, propadiene, and other polar hydrocarbons. The new deactivation results in more predictable responses, increased capacity, and higher temperature stability. (PDF - 0MB)

Resolve Benzene and Toluene in Spark Ignition Fuels Containing Ethanol

This 2-column set for modified ASTM Method D3606-10 completely resolves benzene from ethanol in reformulated fuels containing ethanol. The aromatic compounds also are fully separated and can easily be quantified using sec-butanol as an internal standard. (PDF - 0MB)

Detailed Hydrocarbon Analaysis (DHA) Featuring Rtx-DHA Columns

Rtx-DHA columns are ideal for Detailed Hydrocarbon Analaysis (DHA) methods and easily meet or exceed both ASTM D6730-01 and Canadian General Standards Board CAN/CGSB 3.0 No. 14.3-99 requirements. Every Rtx-DHA column is tested for retention, efficiency, stationary phase selectivity, and bleed—guaranteeing reproducible column-to-column performance. (PDF - 4MB)

Restek's PLOT Column Family

Restek's porous layer open tubular (PLOT) columns feature an innovative bonding process that minimizes particle release for more consistent flow, stable retention times, outstanding peak symmetry, and improved impurity analysis. Restek PLOT columns are the benchmark for performance. (PDF - 3MB)

Get Guaranteed Method Performance With MXT-1HT SimDist Columns

Increase lab productivity and confidence in your data. Featuring rugged Siltek-treated MXT tubing to eliminate breakage, all 5 m x 0.53 mm x 0.10 μm MXT-1HT SimDist columns from Restek (cat.# 70112) are tested up to 430 °C. Performance is guaranteed to meet ASTM Method D6352-12, D7169-11, and D7500-12 requirements. (PDF - 0MB)

DiatoSorb-W Diatomaceous Earth: Great Chromatography Millions of Years in the Making

Virtually unlimited in supply—but only available from Restek—new DiatoSorb-W diatomaceous earth offers a reliable alternative for packed column users. After years of dealing with supply shortages and inconsistent product quality, analysts who depend on diatomaceous earth columns now have a reliable new source. Restek now uses DiatoSorb-W as the exclusive replacement to the diatomaceous earth that was previously used in our standard and Silcoport W GC packed columns lines. All DiatoSorb-W material undergoes rigorous quality testing to ensure high purity and dependable performance. DiatoSorb-W material is available in acid-washed (WAW), non-acid washed (WNAW), and high-performance (WHP) varieties. (PDF - 0MB)

DiatoSorb-W Diatomaceous Earth: Great Chromatography Millions of Years in the Making

Struggling to find a reliable supply of white diatomaceous earth? Save time, money, and aggravation by switching to DiatoSorb-W today. Whether you need packed columns or custom packing materials, DiatoSorb-W is consistent in quality and always available. All DiatoSorb-W solid support undergoes rigorous quality testing to ensure high purity and dependable results. Based on its superior performance, DiatoSorb-W solid support has replaced the white diatomaceous earth brand that was previously used in Restek GC packed columns and Silcoport W columns. (PDF - 0MB)

D3606 Application Column Instruction Sheet

This instruction sheet details the proper installation procedure for Restek's D3606 application-specific columns. (PDF - 0MB)

Packed Column Instruction Sheet

These instructions detail proper use guidelines for Restek packed GC columns. (PDF - 0MB)

Accurately Quantify Methanol and Ethanol in E85 Biofuel by D5501 with New Rtx-DHA-150 Column

Improve D5501 analysis of ethanol biofuel with Rtx-DHA-150 columns. Reliably separate methanol and isobutane in just 20 minutes, with excellent symmetry for both target alcohols. (PDF - 0MB)

17 Minute D2712 Analysis of Impurities in Propylene Using PLOT Columns

When analyzing hydrocarbon impurities in propylene by ASTM D2712, using an Rt-Alumina BOND Na2SO4 PLOT column instead of a packed column setup provides the greatest degree of resolution in the least amount of time. (PDF - 0MB)


GC Chromatograms

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