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Original Articles

Determination of the Ester-Cleavage Products of Some Organophosphorus Pesticides by Liquid Chromatography with Electrochemical Detection

, , , &
Pages 4049-4062 | Received 26 Mar 1993, Accepted 15 Apr 1993, Published online: 23 Sep 2006
 

Abstract

A method for determining the phenolic compounds from the hydrolysis of some organophosphorus pesticides by liquid chromatography/ electrochemical' detection has been developed. A carbon fibre micro-electrode was used for the detection. Phenol, 4-nitrophenol, 3-methyl-4-nitro-phenol, and 2,4,5-trichloropyridinol in water were analyzed by the method. The responses of the four phenolic compounds increased steadily with the increased working electrode potential within the potential range of 1.2 to 1.4 V. The detection limits were 0.1 ng for phenol, 0.5 ng for 2,4,5-trichloropyridinol, 1 ng for 4-nitrophenol, and 2 ng for 3-methyl 4-nitrophenol.

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