Калий едкий технический. Определение содержания соединений серы. Метод восстановления и титриметрия
Название (англ.):
Potassium hydroxide for industrial use; Determination of sulphur compounds; Method by reduction and titrimetry
Описание (англ.):
Applicable to products the content of which, expressed as sulphate, is equal or more than 5 mg/kg. The principle consists in the reduction of the sulphur compounds to hydrogen sulphide by heating with a mixture of hydriodic acid and hypophosphorous acid. Distillation of the hydrogen sulphide by a current of purified oxygen-free nitrogen in a mixture of sodium hydroxide and acetone. Titration of the sulphide with standard volumetricmercury(II) nitrate solution in the presence of dithizone as indicator.
Дата регистрации:
15.08.75
Дата введения:
01.08.75
Дата отмены:
01.09.02
Код КГС:
Л19
Код ОКСТУ:
2133;2109
Код ОКС(МКС):
71.060.40
Код ОКП:
2133;2109
Нормативные ссылки:
BS 5634-1978, NEQ*NBN T 03-198-1980, EQV*NF T20-387-1977, EQV*NP-1350-1976, EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICALS DETERMINATION OF CONTENT POTASSIUM HYDROXIDE POTASSIUM HYDROXIDES SULPHATES SULPHUR VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN