Натр едкий технический. Определение содержания карбонатов. Титриметрический метод
Название (англ.):
Sodium hydroxide for industrial use; Determination of carbonates content; Titrimetric method
Описание (англ.):
Applicable to products having contents, expressed as CO2 , of more than 0.01 % (m/m). Relates to a procduct containing neither sulphides nor chlorates or only sulphides or onlychlorates. Preliminary test by boiling an acidified test sample in the presence of methyl orange and with a lead acetate paper strip in the vapour. The sulphides blacken the paper and chlorates delolourize the methyl orange. Products containing neither sulphides nor chlorates: liberation of carbon dioxide by acidification and heating. Entrainment in a flow of gas and absorption in an excess of barium hydroxide solution. Titration of the excess barium hydroxide solution with a standard volumetric hydrochloric acid solution in the presence of thymolphthalein as indicator.
Дата регистрации:
11.05.75
Дата введения:
01.05.75
Код КГС:
Л19
Код ОКСТУ:
2133;2109
Код ОКС(МКС):
71.060.40
Код ОКП:
2133;2109
Нормативные ссылки:
BS 6075 PART 6-1981, EQV*ELOT 678-1982, EQV*NBN T 03-130-1980, EQV*NF T20-426-1976, EQV*NP-1237-1976, EQV*NS 9052-1981, NEQ*SFS 3791 ISO 3196-1983, EQV
Ключевые слова:
CARBON DIOXIDE CARBONATES CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICALS DETERMINATION OF CONTENT SODIUM SODIUM HYDROXIDE VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN