1.1 This standard prescribes spectrophotometric and gas chromatographic methods for the determination of carbofuran (2, 3-dihydro-2, 2-dimethyl-7-benzofuranyl methyl carbamate), 3 hydroxy carbofuran and 3 keto-carbofuran residues in crops, soil and water.
1.1.1 The spectrophotometric method may be adopted as a limit test for routine purposes and is generally applicable at 0.l μg/g ( 0.l ppm ) residue level, whereas, the gas chromatographic method shall be the reference method with the limit of detection of 0.02 μg/g ( 0.02 ppm ).
1.1.2 Though no set procedure for Thin Layer Chromatography ( TLC ) is being prescribed, standardized TLC procedures may be followed, if necessary for the purpose of clean up, identification and confirmation of carbofuran residues.
IS 11020-1984 history
1984IS 11020-1984 Determination method of carbofuran residues in crops, soil and water