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.