Direct gas chromatographic analysis of O,O-dimethyl-and O,O-diethyldithiophosphoric acids and identification of their by-products

Abstract

Direct gas chromatographic methods for the quantitative analysis of O,O-dimethyl- and O,O-diethyldithiophosphoric acids using a 5% SE-30 column and flame ionization detection are described. The separation and identification of by-products were performed by spiking with known standards. The minimum detectable levels were 17.5 ppm for O,O-dimethyl- and 15.5 ppm for O,O-diethyldithio-phosphoric acids.