Сплавы никелевые. Определение содержания фосфора. Спектрометрический метод молекулярной абсорбции с применением молибденовой сини
Название (англ.):
Nickel alloys; determination of phosphorus content; molybdenum blue molecular absorption spectrometric method
Описание (англ.):
Phosphorus content can be determined in the range of 0,001 % (m/m) to 0,025 % (m/m). Cr(III) and silica cause interference which is eliminated. The principle is dissolution of a test portion in a mixture of nitric and hydrochloric acids, fuming with sulfuric acid, oxidation of Cr(III) to Cr(VI), precipitation of Fe(III)phosphate and redissolution of the precipitate, addition of boric, tartaric and sulfamic acids, formation and extraction of molybdophosphoric acid, reduction of the heteropoly acid to molybdenum blue and back-extraction into an aqueous phase, measurement of the absorbance of the aqueous solution at 700 nm.
Дата регистрации:
01.09.92
Дата введения:
01.08.92
Код КГС:
В59
Код ОКСТУ:
1732
Код ОКС(МКС):
77.120.40
Код ОКП:
1732
Нормативные ссылки:
BS 6783 PART 12(1992/BSI), EQV ISO 1042-1983*ISO 5725-1986
Ключевые слова:
ALLOYS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT METALS MOLECULAR ABSORPTION SPECTROPHOTOMETRY MOLYBDENUM BLUE NICKEL ALLOYS NON-FERROUS ALLOYS NON-FERROUS METALS PHOSPHORUS PHOTOMETRY SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTIN MOL NON FERROUS ALLOYS