Distribution and degradation of HCCH and DDT residues in butter milk, butter and butter oil during processing.

Milk was fortified with 5-80 p.p.m. hexachlorocyclohexane (HCH) or DDT and converted into butter, buttermilk and ghee. HCH residues (in p.p.m.) found in butter from milk containing HCH at 5 and 80 p.p.m. were 2.85 and 69.47, resp.; corresponding values for buttermilk were 2.05 and 10.42, and for ghee 2.01 and 45.49. Data are also given on concn. of different HCH isomers in these products. Corresponding DDT residues found were 3.32 and 70.76 for butter, 1.58 and 8.64 for buttermilk, and 2.14 and 31.60 for ghee.