Глинозем, преимущественно используемый для производства алюминия. Определение содержания двуокиси кремния. Спектрофотометрический метод с применением восстановленного молибдосиликата
Название (англ.):
Aluminium oxide primarily used for the production of aluminium; Determination of silica content; Reduced molybdosilicate spectrophotometric method
Описание (англ.):
The method is applicable to products having a silica content between 0.005 % (m/m) and 0.025 % (m/m) provided that the content of phosphorus pentoxide plus vanadium pentoxide does not exceed 0.02 % (m/m). The principle of the method is based on the formation of oxidized molybdosilicate (yellow)under well-defined conditions of acidity, concentration of reagents, temperature and time. Selective reduction of the complex in a highly acidic medium of sulphuric acid and in the presence of tartaric acid. Spectrophotometric measurement of the reduced coloured complex at a wavelength of about 815 nm. - Replaces ISO Recommendation R 1232-1970.
Дата регистрации:
01.11.76
Дата введения:
01.09.76
Код КГС:
А39
Код ОКСТУ:
1710;1709
Код ОКС(МКС):
71.100.10
Код ОКП:
1710;1709
Нормативные ссылки:
BS 4140 PART 5-1986, EQV*NBN T 03-410-1983, EQV*NF T20-206-1973, EQV
Ключевые слова:
ALUMINIUM ALUMINIUM OXIDE CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT SILICON DIOXIDE SPECTROPHOTOMETRIC ANALYSIS SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTIN