Headspace gas chromatography of carbon disulphide in the determination of dithiocarbamate fungicide residues

Abstract

The determination of residues of dithiocarbamate fungicides by headspace gas chromatography of CS₂ following acid degradation is subject to error if the calibration of the flame photometric detector is affected by the solvent used to prepare the CS₂ standards. Hexane co-elutes with CS₂ on a 1% OV-17 + 4% QF1 column packing, resulting in the quenching of the sulphur emission in the detector. The use of other solvents or column packings in the determination avoids this problem.