GB/T 18921-2002 The reuse of urban recycling water—Water quality standard for scenic environment use

GB/T 18921-2019 The reuse of urban recycling water—Water quality standard for scenic environment use

GB/T 16488 GB/T 6920-1986 Water quality—Determination of pH value—Glass electrode method GB/T 7466-1987 Water quality—Determination of total chromium GB/T 7467-1987 Water quality—Determination of chromium (Ⅵ)—1,5 Diphenylcarbohydrazide spectrophotometric method GB/T 7468-1987 Water quality—Determination of total mercury—Cold atomic absorption spectropho to metry GB/T 7472-1987 Water quality—Determination of zinc—Spectrophotometric method with dithizone GB/T 7474-1987 Water quality—Determination of copper—Sodium diethyldithiocabamate spectrophotometric method GB/T 7475-1987 Water quality—Determination of copper, zinc, lead and cadmium—Atomic absorption spectrometry GB/T 7478-1987 Water quality—Determination of ammonium—Distillation and titration method GB/T 7485-1987 Water quality—Determination of total arsenic—Silver diethyldithiocarbamate spectrophotometric method GB/T 7486-1987 Water quality—Determination of cyanide Part 1 Determination of total cyanide GB/T 7488-1987 Water quality—Determination of biochemical oxygen demand after 5 days(BOD5)—Dilution and seeding method GB/T 7489-1987 Water quality—Determination of dissolved oxygen—Iodometric method GB/T 7490-1987 Water quality—Determination of volatile phenolic compounds—After distillation by means of 4-AAP spectrophotometric method GB/T 7494-1987 Water quality—Determination of anionic surfactants—Methylene blue spectrophotometric method GB/T 8972-1988 Water quality—Determination of pentachlorophenol—Gas chromatography GB/T 9803-1988 Water quality—Determination of pentachlorophenol by safranine-T spectrophotometric method GB/T 11889-1989 Water quality—Determination of aniline compounds—Spectrophotometric method with N-(1-naphthyl) ethylenediamine GB/T 11890-1989 Water quality—Determination of benzene and its analogies—Gas chromatographic method GB/T 11893-1989 Water quality—Determination of total phosphorus— Ammonium molybdate spectrophotometric method GB/T 11894-1989 Water quality—Determination of total nitrogen—Alkaline potassium persulfate digestion-UV spectrophotometric method GB/T 11895-1989 Water quality—Determination of benzo(a)-pyrene—Acetylated paper chromatography with fluorescence spectrophotometric method GB/T 11898-1989 Water quality—Determination of free chlorine and total chlorine—Spectrophotometric method using N,N-diethyl-1,4-phenylenediamine GB/T 11901-1989 Water quality—Determination of suspended substance—Gravimetric method GB/T 11902-1989 Water quality—Determination of selenium—Diaminonaphthalene fluorometric method GB/T 11903-1989 Water quality—Determination of colority GB/T 11906-1989 Water quality—Determination of manganese—Potassium periodate s spectrophotometric method GB/T 11907-1989 Water quality—Determination of silver—Flame atomic absorption spectrophotometric method GB/T 11910-1989 Water quality—Determination of nickel—Dimethylglyoxime spectrophotometric method GB/T 11911-1989 Water quality—Determination of irom and manganese—Flame atomic absorption spectrometric method GB/T 11912-1989 Water quality—Determination of nickel—Flame atomic absorption spectrometric method GB/T 11913-1989 Water quality—Determination of dissolved oxygen—Electrochemical probe method GB/T 13192-1991 Water quality—Determination of organic phosphorous pesticide in water—Gas chromatography GB/T 13194-1991 Water quality—Determination of nitrobenzene, mononitrotoluene (MNT), nitrochlorobenzene and dinitrotoluene (ONT)—Gas chromatography GB/T 13197-1991 Water quality—Determination of formaldehyde—Acetylacetone spectrophotometric method GB/T 13200-1991 Water quality—Determination of turbidity GB/T 14204-1993 Water quality—Determination of alkylmercury—Gas chromatography GB/T 15959-1995 Water quality—Determination of adsorbable organic halogens (AOX)—Microcoulometric method