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Flame Ionisation Detector (FID)

Use of a Flame Ionisation Detector (FID) is a very common analytical technique used in the petrochemical, pharmaceutical and natural gas sectors to analyse carbon-based organic compounds.

A 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 that is then measured. FID is often used in conjunction with a GC instrument.

As is common with other GC techniques, the gases used require low water and oxygen impurities, as these can negatively interact with the stationary phase. These cause significant problems including high baseline noise and column bleed in the output gas chromatogram, resulting in reduced analyser sensitivity and decreased column lifespan. Additionally an FID is extremely sensitive to hydrocarbon impurities in the hydrogen and air supply for the flame.

Air Products range of Experis® ultra-high-purity gases and gas mixtures, and our unique BIP® cylinder technology have been specifically designed to improve both the accuracy of analysis and the lifespan of core GC-FID components by minimising the critical impurities in the gases supplied
Download Experis® Ultra-high Purity Gases Technical Specification Synthetic Air brochure

Our Gases for FID Analysis

Experis® High Specification FID Fuel Gas Mixtures

40% hydrogen in helium or nitrogen with less than 0.1 ppm total hydrocarbon content (THC)

Standard Fuel Gas Compositions

40% hydrogen in helium or nitrogen with less than 1 ppm total hydrocarbon content (THC)

Hydrogen BIP® Technology

Unrivalled specifications with less than 10 ppb total hydrocarbon content (THC)

Hydrogen Premier Plus

Less than 100 ppb total hydrocarbon content (THC)

Zero Air Plus (Synthetic Air Plus)

Less than 50 ppb total hydrocarbon content (THC)

Zero Air (Synthetic Air)

Less than 200 ppb total hydrocarbon content (THC)

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Trish Lees

Business Development Specialist

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