An inexpensive gas chromatograph for the detection and collection of labile organophosphorus compounds

Abstract

A gas chromatograph suitable for use with labile organophosphorus compounds is described. It incorporates all-glass systems for detection and collection, with an exceptionally short distance from the column to the detector or collector. Easily exchanged thermionic and flame-ionisation detectors are used. The instrument is simple, convenient and cheap to make.

The thermionic detector is sensitive to less than 1 pg of diazinon and responds linearly over a 5000-fold range. Fractions from 50 ng to 50 µg have been collected with 90 to 100 per cent. efficiency.