GB/T 5750.9-2006

This standard replaces the DDT and HCH in Part II of GB/T 5750-1985 "Standard Test Methods for Drinking Water". The main changes compared with GB/T 5750-1985 are as follows: — The structure is adjusted according to GB/T 1.1-2000 "Guidelines for Standardization Work - Part 1: Structure and Writing Rules for Standards" and GB/T 20001.4-2001 "Rules for Standard Writing - Part 4: Chemical Analysis Methods"; — The quantity and unit of measurement are modified according to the requirements of national standards; — The equivalent concentration is changed to molar concentration (the equivalent concentration is still retained in the redox part); — The symbol for mass concentration is changed from C to ρ, and the symbol for content is changed from M to m; — Thirty test methods for 19 indicators (lindane, parathion, methyl parathion, endosulfan, malathion, rotenone, chlorothalonil, methiocarb, deltamethrin, paraquat, 2,4-D, diazinon, phorate, chlorpyrifos, atrazine, heptachlor, hexachlorobenzene, pentachlorophenol) in drinking water are added; — The capillary column gas chromatography method for DDT and HCH in drinking water is added.