Натр едкий технический. Определение содержания хлоридов. Фотометрический метод
Название (англ.):
Sodium 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 50 mg/kg the method specified in ISO 981 shall be used. The principle consists in the quantitative displacement of the thiocyanate ions of the mercury(II) thiocyanate by the cloride ions contained in the test portion. Reaction of the thiocyanate ions with iron(III) nitrate to form iron(III) thiocyanate (red). Photometric measurement of thecolour at a wavelength of about 450 nm.
Дата регистрации:
01.04.75
Дата введения:
01.03.75
Дата отмены:
27.05.02
Код КГС:
Л19
Код ОКСТУ:
2133;2109
Код ОКС(МКС):
71.060.40
Код ОКП:
2133;2109
Нормативные ссылки:
BS 6075 PART 7-1981, EQV*NBN T 03-131-1980, EQV*NF T20-430-1976, EQV*NP-1160-1976, EQV*NS 9053-1981, NEQ
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICALS CHLORIDES DETERMINATION OF CONTENT SODIUM SODIUM HYDROXIDE SPECTROPHOTOMETRIC ANALYSIS SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTIN