HG/T 5694\uff5e5697-2020
DB34/T 2372-2015
UNE 55512-3:1982
SURFACE ACTIVE AGENTS. TECHNICAL SODIUM ALKYLARYL-SULPHONATES (EXCLUDING BENZENE DERIVATIVES). DETERMINATION OF THE CONTENT OF THE SODIUM ALKYLARYL-SULPHONATES
UNE 55512-4:1982
SURFACE ACTIVE AGENTS. TECHNICAL SODIUM ALKYLARYL-SULPHONATES (EXCLUDING BENZENE DERIVATIVES). DETERMINATION OF THE CONTENT OF THE SODIUM SULPHITE
UNE 34210:1981
SODIUM CHLORIDE. DETERMINATION OF FLUORIDE CONTENT. PHOTOMETRIC METHOD WITH SODIUM 2-(SULFOPHENYLAZO)-1,8 DIHYDROXYNAPHTHALENE-3,6 DISULFONATE (SPADNS).