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1776114 
Technical Report 
Sequential thin-layer chromatography of leptophos and related compounds 
Abou-Donia, MB 
1978 
Yes 
Journal of Chromatography A
ISSN: 0021-9673
EISSN: 1873-3778 
PESTAB/78/1214 
Chromatogr 
1 
238-241 
PESTAB. A rapid thin-layer chromatographic method which offers fast and convenient analyses of leptophos and its possible degradation products is reported. The best solvent system for the separation of polar compounds from each other as well as from non-polar compounds was acetonitrile: water: ammonia (40:9:1). In this system all non-polar compounds moved together and too fast with the solvent front to interfere with the polar compounds. The polar substances moved at separate distances from each other. It is noted that a fresh solution of leptophos oxon in acetone always gave one spot, while old acetone solutions gave 2 or 3 spots of which one corresponded to leptophos oxon. This indicates instability of leptophos oxon, as well as use of mild conditions for extraction, clean-up and analysis of leptophos breakdown products.