Калий едкий технический. Определение содержания хлоридов. Фотометрический метод
Название (англ.):
Potassium hydroxide for industrial use; Determination of chlorides content; Photometric method
Описание (англ.):
Applicable to products having contents, expressed as chlorine, between 2 mg/kg and 50 mg/kg. For contents exceeding 50mg/kg the method specified in ISO 992 shall be used. The principle consists in quantitative displacement of the thiocyanate (SCN- ) ions of the mercury(II) thiocyanate by the cloride (Cl- ) ions contained in the test portion. Reaction of the thiocyanate ions with iron(III) nitrate to form iron(III) thiocyanate (red).Photometric measurement of the colour at a wavelength of about 450 nm.
Дата регистрации:
01.04.75
Дата введения:
01.03.75
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 03-197-1980, EQV*NF T20-375-1977, EQV*NP-1159-1976, EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICALS CHLORIDES DETERMINATION OF CONTENT POTASSIUM HYDROXIDE POTASSIUM HYDROXIDES SPECTROPHOTOMETRIC ANALYSIS SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTIN