1.1 The standard prescribes gas chromatographic method for the quantitative estimation of fenth-ion [o, o-dimethyl-o ( 4-methyl mercapto-3-methyl phenyl )-thiophosphate in foods ( fruits and vege-tables ). Fenthion has to be estimated as its metabolite, fenoxon sulphone.
1.1.1 This method is applicable with a limit of detection in the range of 0.1 μg/g.
1.1.2 Though no set procedure for thin layer chromatography ( TLC ) is being prescribed, any standardised TLC procedure may be followed if necessary for clean up, identification and confir-mation of fenthion residues.
IS 12609-1989 history
1989IS 12609-1989 Pesticides—Determination of residues in food—fenthion