FPD - Flame Photometric GC Detector Introduction The reason...

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Flame Photometric GC Detector Introduction The reason to use more than one kind of detector for gas chromatography is to achieve selective and/or highly sensitive detection of specific compounds encoun- tered in particular chromatographic analyses. The determination of sulfur or phos- phorus containing compounds is the job of the flame photometric detector (FPD). This device uses the chemiluminescent reactions of these compounds in a hydro- gen/air flame as a source of analytical information that is relatively specific for substances containing these two kinds of atoms. The emitting species for sulfur compounds is excited S 2 . The λ max for emission of excited S 2 is approximately 394 nm. The emitter for phosphorus compounds in the flame is excited HPO ( λ max = doublet 510-526 nm). In order to selectively detect one or the other family of compounds as it elutes from the GC column, an interference filter is used be- tween the flame and the photomultiplier tube (PMT) to isolate the appropriate
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This note was uploaded on 03/03/2012 for the course CHEM 100 taught by Professor Chasteen during the Fall '06 term at Sam Houston State University.

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FPD - Flame Photometric GC Detector Introduction The reason...

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