Vb. Patil et Ms. Shingare, THIN-LAYER CHROMATOGRAPHIC DETECTION OF CARBARYL USING PHENYLHYDRAZINE HYDROCHLORIDE, Journal of chromatography, 653(1), 1993, pp. 181-183
A new chromogenic spray reagent for the detection of the commonly misu
sed carbamate insecticide carbaryl, is described. Carbaryl, on alkalin
e hydrolysis, yields 1-naphthol, which in turn reacts with phenylhydra
zine hydrochloride to give a red complex. This reagent is selective fo
r carbaryl. There is no interference from other carbamate insecticides
or from organophosphorus, organochlorine and pyrethroid insecticides
or from constituents of visceral extracts (amino acids, peptides, prot
eins, etc.). The limit of detection of the reagent is ca. 0.1 mu g per
spot (i.e. ca. 350 ng/cm(2)) observed after development.