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Analytical Laboratories Applications

Gas Chromatography (GC)

Gas Chromatography (GC) is a very widely-used analytical technique.  Used to determine the composition of a mixture of chemicals (sample), a gas chromatograph uses a variety of gases in its operation depending on the specific analyser and detector type.  Using the optimum specialty gas and equipment when conducting Gas Chromatography will greatly improve the accuracy of your analytical results.

A carrier gas is used to carry the sample through the column of the gas chromatograph. Critical impurities within the carrier gas such as Water and Oxygen can interact with the stationary phase and cause significant problems such as high baseline noise and column bleed in the output gas chromatogram which both reduces the analyser sensitivity and decreases column lifetime.

Depending on the technique, additional gases are sometimes required such as a make-up gas which is used at the exit of the column to increase the flow rate into the detector. Calibration mixtures are also used for the calibration of many analysers.

The Experis® specialty gases range from Air Products has been specially developed for the gas chromatography user and includes ultra high purity gases, gas mixtures and gas-handling equipment. Our patented BIP® technology offers the highest purity levels in Argon, Nitrogen, Helium and Hydrogen for the most demanding gas chromatography techniques and applications requiring ultra low levels of Water, Oxygen and Hydrocarbons. With our extensive range of process, calibration and accredited gas mixtures with an infinite variety of components at levels as low as parts per billion (ppb), we offer the mixture stability, certification and traceability to meet your gas chromatograph calibration needs. Our range of gas-handling equipment includes high quality cylinder regulators, manifolds, valves and purge systems which also help to optimise the smooth operation and accuracy of your analysis.

The recommended gases and equipment for this application are listed below. Please note that our recommendation is based on common analytical requirements, so you may require a higher purity grade if analysing to lower concentrations or be able to use a lower purity grade if analysing to higher concentrations. If you require any additional advice on the right purity grade for your needs, please contact us. 

Other Applications

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Product NameDescription/BenefitsDownloads
Gases

Argon BIP® gas

Argon supplied using our patented BIP® technology contains ultra low levels of Oxygen, Hydrocarbons and Water making it an ideal carrier gas for Gas Chromatography as it minimises column bleed and baseline noise for more accurate analyses.

Argon supplied using our patented BIP® technology contains ultra low levels of Oxygen, Hydrocarbons and Water making it an ideal carrier gas for Gas Chromatography as it minimises column bleed and baseline noise for more accurate analyses.

Helium BIP® gas

Helium supplied using our patented BIP® technology contains ultra low levels of Oxygen, Hydrocarbons and Water making it an ideal carrier and makeup gas for many laboratory applications as it minimises column bleed and baseline noise for more accurate analyses.

Helium supplied using our patented BIP® technology contains ultra low levels of Oxygen, Hydrocarbons and Water making it an ideal carrier and makeup gas for many laboratory applications as it minimises column bleed and baseline noise for more accurate analyses.

Hydrogen BIP® gas

Hydrogen supplied using our patented BIP® technology contains ultra low levels of Oxygen, Water and Hydrocarbons making it an ideal carrier, makeup and detector gas for gas chromatography as it minimises column bleed and baseline noise for more accurate analyses.

Hydrogen supplied using our patented BIP® technology contains ultra low levels of Oxygen, Water and Hydrocarbons making it an ideal carrier, makeup and detector gas for gas chromatography as it minimises column bleed and baseline noise for more accurate analyses.

Nitrogen BIP® gas

Nitrogen supplied using our patented BIP® technology contains ultra low levels of Oxygen, Hydrocarbons and Water making it an ideal carrier and makeup gas for gas chromatography as it minimises column bleed and baseline noise for more accurate analyses.

Nitrogen supplied using our patented BIP® technology contains ultra low levels of Oxygen, Hydrocarbons and Water making it an ideal carrier and makeup gas for gas chromatography as it minimises column bleed and baseline noise for more accurate analyses.

Zero Air

Zero Air with its ultra low Hydrocarbons impurities is perfect for use as a detector gas in many GC techniques to reduce baseline noise and ensure detector sensitivity.

Zero Air with its ultra low Hydrocarbons impurities is perfect for use as a detector gas in many GC techniques to reduce baseline noise and ensure detector sensitivity.

Cylinder Regulators

Essential for reducing the gas pressure at the cylinder source, our range of high-quality cylinder regulators are available in single- or double-stage, a variety of materials such as brass, stainless steel and Monel®, and various inlet and outlet pressure ranges.

Essential for reducing the gas pressure at the cylinder source, our range of high-quality cylinder regulators are available in single- or double-stage, a variety of materials such as brass, stainless steel and Monel®, and various inlet and outlet pressure ranges.

Line Regulators

Essential for reducing the gas pressure in a pipeline, our range of high-quality line regulators are available in either brass or stainless steel, and various flowrate and outlet pressure ranges.

Essential for reducing the gas pressure in a pipeline, our range of high-quality line regulators are available in either brass or stainless steel, and various flowrate and outlet pressure ranges.

Manifolds

Essential for ensuring a batch or continuous supply, our range of high-quality manifolds can connect up to six cylinders, can provide manual or semi-automatic changeover and are available in brass or stainless steel.

Essential for ensuring a batch or continuous supply, our range of high-quality manifolds can connect up to six cylinders, can provide manual or semi-automatic changeover and are available in brass or stainless steel.

Pressure Gauges

Our high-quality, accurate pressure gauges are available in brass, stainless steel or Monel® for a wide variety of pressure ranges.

Our high-quality, accurate pressure gauges are available in brass, stainless steel or Monel® for a wide variety of pressure ranges.

Purge Systems

Purge systems are essential for eliminating impurities in and/or operator exposure to the gas when changing over cylinders. Our high-quality cross-purge, self-purge and T-purge systems are available in a variety of materials for the handling of pure, toxic, corrosive and flammable gases.

Purge systems are essential for eliminating impurities in and/or operator exposure to the gas when changing over cylinders. Our high-quality cross-purge, self-purge and T-purge systems are available in a variety of materials for the handling of pure, toxic, corrosive and flammable gases.

Valves

Our range of high-quality check valves and relief valves are available in brass or stainless steel and a variety of connection sizes for the connection of cylinders to equipment.

Our range of high-quality check valves and relief valves are available in brass or stainless steel and a variety of connection sizes for the connection of cylinders to equipment.

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