Шпат плавиковый всех сортов. Определение содержания карбоната. Титриметрический метод
Название (англ.):
All grades of fluorspar; determination of carbonate content; titrimetric method
Описание (англ.):
The principle of the method specified is treatment of a test portion with hydrochloric acid solution, absorption of the evolved carbon dioxide in barium hydroxide solution, neutralization of excess alkali with hydrochloric acid solution, addition of an exactly measured excess of a standard volumetric hydrochloric acid solution to dissolve the precipitated barium carbonate andback-titration with a standard volumetric sodium hydroxide solution using methyl orange as indicator. The method is applicable to products having carbonate contents equal to or greater than 0,04 % (m/m).
Заменяет стандарты:
ISO 4283(1990.06)
Дата регистрации:
01.02.93
Дата введения:
01.01.93
Код КГС:
А59
Код ОКСТУ:
5726
Код ОКС(МКС):
73.080
Код ОКП:
5726
Нормативные ссылки:
ISO 565-1990*ISO 4793-1980*ISO 8868-1989
Ключевые слова:
CARBONATES CHEMICAL ANALYSIS AND TESTING COAL DETERMINATION OF CONTENT FLUORSPAR ORES VOLUMETRIC ANALYSIS CHEMICAL ANALYSIS AND TESTIN