Натрий фтористый, преимущественно используемый для производства алюминия. Определение содержания железа. Фотометрический метод с применением 1,10-фенантролина
Название (англ.):
Sodium fluoride primarily used for the production of aluminium; Determination of iron content; 1,10- Phenanthroline photometric method
Описание (англ.):
Applicable to the determination of Fe contents, expressed as Fe2 O3 , of more than 0.020 % (m/m). Covers the dissolution of a test portion by alkaline fusion by means of sodium carbonate and boric acid. Dissolving of the residue with nitric acid solution and reduction of iron(III) by means of hydroxylammonium chloride. Formation of the iron(II)-1,10-phenanthroline complex in a buffered medium at a pH between 3.5 and 4.2. Photometric measurement of the colouredcomplex at a wavelength of about 510 nm.
Дата регистрации:
10.08.76
Дата введения:
01.07.76
Код КГС:
Л19
Код ОКСТУ:
2154;2109
Код ОКС(МКС):
71.100.10
Код ОКП:
2154;2109
Нормативные ссылки:
BS 5072 PART 5-1980, EQV*NBN T 03-465-1983, EQV*NF T20-151-1984, EQV
Ключевые слова:
CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CHEMICAL COMPOUNDS CONNECTIONS DETERMINATION OF CONTENT FLUORIDES IRON SODIUM SODIUM FLUORIDES SPECTROPHOTOMETRIC ANALYSIS SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTIN