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Analytical Laboratories Applications

GC with Flame Ionization Detector (GC-FID)

Gas Chromatography – Flame Ionization Detector or GC-FID is a very common analytical technique that is widely used in the petrochemical, pharmaceutical and natural gas markets.

An FID typically uses a Hydrogen/Air flame into which the sample is passed to oxidise organic molecules and produces electrically charged particles (ions). The ions are collected and produce an electrical signal which is then measured.

As common with other GC techniques, a carrier gas is required with low Water and Oxygen impurities since 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. The FID is also extremely sensitive to Hydrocarbon impurities in the Hydrogen and Air supply for the flame. Hydrocarbon impurities can cause increased baseline noise and reduce the detector sensitivity.

The routine calibration of the analyser using a calibration mixture is common.

Our range of Experis® ultra high purity gases and patented BIP® technology offer you the optimum gas for your GC-FID requirements. Don’t forget your choice of cylinder equipment - our range includes high quality cylinder regulators, manifolds, valves and purge systems which will 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

Product NameDescription/BenefitsDownloads
Gases

Helium BIP® gas

Helium 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 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.

Hydrogen BIP® gas

Hydrogen supplied using our patented BIP® technology with its ultra low Oxygen, Hydrocarbons and Water impurities is perfect for use as a detector gas in GC-FID to reduce baseline noise and ensure detector sensitivity, as well as a carrier gas to reduce column bleed and baseline noise.

Hydrogen supplied using our patented BIP® technology with its ultra low Oxygen, Hydrocarbons and Water impurities is perfect for use as a detector gas in GC-FID to reduce baseline noise and ensure detector sensitivity, as well as a carrier gas to reduce column bleed and baseline noise.

Nitrogen BIP® gas

Nitrogen 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.

Nitrogen 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.

Process Mixtures

Our Experis® range of gas mixtures includes 40% Hydrogen in Helium and 40% Hydrogen in Nitrogen - these have ultra low Hydrocarbon impurity levels making them perfect for GC-FID detector gases.

Our Experis® range of gas mixtures includes 40% Hydrogen in Helium and 40% Hydrogen in Nitrogen - these have ultra low Hydrocarbon impurity levels making them perfect for GC-FID detector gases.

Zero Air

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

Equipment

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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