Гексафторсиликат натрия технический. Определение содержания фосфатов. Спектрофотометрический метод с применением молибдованадата
Название (англ.):
Sodium hexafluorosilicate for industrial use; Determination of phosphate content; Molybdovanadate spectrophotometric method
Описание (англ.):
Applicable to products having contents, expressed as phosphorus pentoxide, of 0.005 % (m/m) to 0.05 % (m/m). The residue from the determination of the loss of mass according to ISO 5444 is used to prepare the test sample. Dissolution in dilute hydrochloric acid and nitric acid solutions. Formation of the yellow molybdovanadate and spectrophotometric measurement at a wavelength of about 420 nm. Calculation of the content from the measured absorbance.
Дата регистрации:
01.10.78
Дата введения:
01.10.78
Код КГС:
Л19
Код ОКСТУ:
2145;2109;2154
Код ОКС(МКС):
71.060.50
Код ОКП:
2145;2109;2154
Нормативные ссылки:
BS 5705 PART 2-1979, EQV*NBN T 03-527-1983, EQV*NF T20-531-1984, EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICAL COMPOUNDS CONNECTIONS DETERMINATION OF CONTENT FLUOROSILICATES ORTHOPHOSPHATES PHOSPHATES SODIUM SODIUM FLUOROSILICATES SPECTROPHOTOMETRIC ANALYSIS SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTIN FLUORINE SILICATES