Криолит природный и искусственный. Определение содержания алюминия. Гравиметрический метод с применением 8-гидроксихинолина
Название (англ.):
Cryolite (natural and artificial); Determination of aluminium content; 8- Hydroxyquinoline gravimetric method
Описание (англ.):
The method can be applied provided the Fe203 content does not exceed 0,15 . It can also be applied to products with molar ratio of NaF to AlF3 between approximately 3 and 1,7. The principle consists in dissolution of a test portion by acid fusion using potassium pyrosulphate and recovery byhydrochloric acid. Separation of the mixture by precipitation of aluminium, with ammonium benzoate , in an acetic reducing medium. Dissolution of the precipitate and reprecipitation as aluminium tri(quinolin-8-oxide) in an acetic buffer medium. Filtration, washing, drying of the precipitate at a temperature of 130
Дата введения:
01.12.72
Код КГС:
Л19
Код ОКСТУ:
2157;2109
Код ОКС(МКС):
71.060.50
Код ОКП:
2157;2109
Нормативные ссылки:
BS 5050-1974, NEQ*NBN T 03-437-1983, EQV
Ключевые слова:
ALUMINIUM ALUMINIUM ORES CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CRYOLITE DETERMINATION OF CONTENT GRAVIMETRIC ANALYSIS METALLIFEROUS MINERALS CHEMICAL ANALYSIS AND TESTIN