Method One of this Standard specifies the determination of hexachlorocyclohexane (HCH), dichloro-diphenyl-dichloroethane (DDD), hexachlorobenzene, mirex, heptachlor, chlordane, aldrin, dieldrin, endrin, endosulfan, pentachloronitrobenzene in foods. Method Two specified the determination of residues of hexachlorocyclohexane, dichloro-diphenyltrichloroethane (DDT) in foods.