Гексафторсиликат натрия технический. Определение содержания железа. Спектрофотометрический метод с применением 1,10-фенантролина
Название (англ.):
Sodium hexafluorosilicate for industrial use; Determination of iron content; 1,10 phenanthroline spectrophotometric method
Описание (англ.):
Applicable to products having Fe contents between 0.0004 % (m/m) and 0.1 % (m/m). The residue from the determination of the loss of mass according to ISO 5444 is used to prepare the test sample. Decomposition of the hexafluorosilicate and elimination of silica by evaporation with hydrofluoric and sulphuric acids.Dissolution of the residue in hydrochloric acid and reduction of the iron(III) with hydroxylammonium chloride. Formation of a complex between iron(II) and 1,10-phenanthroline in a buffered medium, spectrophotometric measurement of the coloured complex at a wavelength of about 510 nm. Has also been approved by the IUPAC.
Дата регистрации:
01.12.78
Дата введения:
01.11.78
Дата отмены:
30.05.02
Код КГС:
Л19
Код ОКСТУ:
2108;2109
Код ОКС(МКС):
71.060.50
Код ОКП:
2108;2109
Нормативные ссылки:
BS 5705 PART 3-1979, EQV*NBN T 03-529-1983, EQV*NF T20-531-1984, EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICAL COMPOUNDS CONNECTIONS DETERMINATION OF CONTENT FLUOROSILICATES IRON SODIUM SODIUM FLUOROSILICATES SPECTROPHOTOMETRIC ANALYSIS SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTIN FLUORINE SILICATES