Gas Chromatography Blog

Saturation of GC Detectors

In this technical article, the causes and effects of saturation and ways to detect and avoid it are discussed.

This article relates to the causes of saturation, what effect saturation might have on analytical results, how to know when it is happening, and how to avoid it. 
Each style of GC detector will detect compounds based on some physical or chemical characteristic of the sample. In flame ionization detectors (FID), organic compounds are burned in an H2/air flame and form ions that are collected on a polarized electrode (the “collector”). Other detectors respond in different ways, but the response always ends up as an amplified electrical signal (which then is usually digitized and stored).

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