IS 6169 : 1983 Methods for determination of BHC,(HCH) residue in food comodities

1 Scope

1.1 This standard prescribes gas chromatographic andspectrophotometric methods for the determination of BHC (1, 2, 3,4, 5, 6-hexachlorocyclohexane) residues in foods.

1.1.1 The gas chromatographic method determines residues ofalpha-, beta-, gamma- and delta-BHC isomers individually in therange of 0.01 to 0.04 �g/g (0.01 to 0.04 ppm),whereas the limit of detection with spectrophotometric method fortotal BHC is 0.2 to 0.6 �g/g (0.2 to 0.6 ppm).

1.1.2 The procedures based on the use of alternate GLC column,thin layer chromatography and microalkali derivatization are alsobeing prescribed for the confirmation of the nature of BHCresidues.

2 Reference

IS 2 : 1960 Rules forrounding off numerical values