1.1 This standard prescribes spectrophotometric and gas chromatographic methods for determination of methyl parathion [ 0,0-dimethyl 0-( 4-nitrophenyl) phosphorothioate ] and its oxygen analogue residues in foods.
1.1.1 Spectrophotometric method may be adopted as a limit test for routine purposes whereas gas chromatography method shall be the reference method with a minimum detection limit of 0.05 μg/g ( 0.05 ppm ) of methyl parathion residues.
1.1.2 Though no set procedure for thin layer chromatography ( TLC ) is being prescribed, any standardized TLC procedure may be followed if necessary for clean up, identification and confirmation of methyl parathion residues.
IS 10630-1983 history
1983IS 10630-1983 Method for determination of aldicarb residues in crops, soil and water