Карбонат натрия технический. Определение содержания соединений серы. Метод восстановления и титриметрия
Название (англ.):
Sodium carbonate for industrial use; Determination of sulphur compounds content; Method by reduction and titrimetry
Описание (англ.):
Applicable to products having a S compounds content, expressed as sulphate, of equal to or more than 5 mg/kg. Bases of progressive neutralization, with evolution of carbon dioxide, by adding slowly a mixture of hydriodic acid and hypophosphoruos acid. Reduction of the compounds tohydrogen sulphide by heating. Distilation of the hydrogen sulfide, entrainment in a flow of oxygen-free nitrogen and absorption in a mixture of acetone and sodium hydroxide solution. Titration of the sulphide with standard volumetric mercury(II) nitrate solution in the presence of dithizone as indicator. Has also been approved by the IUPAC.
Дата регистрации:
01.11.77
Дата введения:
01.11.77
Дата отмены:
01.09.02
Код КГС:
Л19
Код ОКСТУ:
2131;2109
Код ОКС(МКС):
71.060.50
Код ОКП:
2131;2109
Нормативные ссылки:
BS 6070 PART 5-1981, EQV*NBN T 03-114-1979, EQV*NP-1691-1980, EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICAL COMPOUNDS CONNECTIONS DETERMINATION OF CONTENT POTASSIUM CARBONATE REDUCTION METHODS SODIUM CARBONATE SODIUM CARBONATES SULPHATES SULPHUR VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN