An Indium-Sensitized, Flame-Photometric Detector for Gas Chromatography of Halogen Compounds

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Abstract
A GC detector that shows a highly selective and sensitive response to compounds containing chlorine, bromine, and iodine (but not fluorine) is based on light emission at 360 mµ when the halogen compounds in the column effluent are burned in a hydrogen-oxygen flame over a stainless steel screen coated with indium. The emitted light, after passing a 360-mµ interference filter, is monitored by a photomultiplier tube which registers its response on a strip-chart recorder. In a log-log plot the response is linear over a usable range. Performance of the detector in the determination of halogen and non-halogen compounds in isothermal and temperature-programmed analyses is described. The use of the detector in the analysis of residues of chlorinated pesticides in milk and corn is illustrated.

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