CJ 26.14-1991 Urban sewage water quality testing methods standard: Determination of benzene-based substances (C6-C8) by gas chromatography

CJ 26.3-1991 Urban sewage water quality testing method standard: Determination of easy settling solids by volume method CJ 26.5-1991 Urban sewage water quality testing method standard: Determination of total solid content by weight method CJ 26.9-1991 Urban sewage water quality testing methods standard: Determination of cyanide CJ 26.10-1991 Urban sewage water quality testing methods standard: Determination of sulfide CJ 26.11-1991 Urban sewage water quality testing method standard: Determination of sulfate by weight method CJ 26.13-1991 CJ 26.13-1991 Urban sewage water quality testing methods standard - Determination of benzeneamine - Azo-spectrophotometry CJ 26.15-1991 Urban sewage water quality testing methods standard for determination of copper, zinc, lead, cadmium, manganese, nickel, and iron using atomic absorption spectrometry CJ 26.17-1991 Urban sewage water quality testing methods standard for the determination of zinc: Dianosulfanate spectrophotometry CJ 26.18-1991 Urban sewage water quality testing methods standard: Determination of mercury by cold-atom absorption photometry CJ 26.19-1991 Urban sewage water quality testing method standard: Determination of lead by bisulphazon spectrophotometry CJ 26.21-1991 Urban sewage water quality testing methods standard: Determination of hexavalent chromium using diphenylcarbazide spectrophotometry CJ 26.26-1991 Urban sewage water quality testing method standard: Determination of nitrite nitrogen by spectrophotometry CJ 26.28-1991 Urban sewage water quality testing method standard: Determination of total phosphorus by spectrophotometry