Шпат плавиковый для металлургии. Определение содержания свинца. Спектрометрический метод атомной абсорбции после экстракции растворителем
Название (англ.):
Metallurgical-grade fluorspar; determination of lead content; solvent extraction atomic absorption spectrometric method
Описание (англ.):
The principle of the method specified is to decompose a test portion by a mixture of nitric, hydrofluoric and perchloric acids, dissolving the salts in hydrochloric acid after evaporation to dryness, extracting the lead from a dilute hydrochloric acid solution of the decomposed test portion into a solution of tri-n-octylphosphine oxide in 4-methyl-2-pentanone, aspirating the extract into the air/acetylene flame of an atomic absorption spectrometer, and measuring the absorbance at 283,3 nm. Applies to products having lead contents in the range 0,0006 % (m/m) to 0,01 % (m/m).
Заменяет стандарты:
ISO 9779(1990.03)
Дата регистрации:
01.05.93
Дата введения:
01.04.93
Код КГС:
А59
Код ОКСТУ:
5726
Код ОКС(МКС):
73.080
Код ОКП:
5726
Нормативные ссылки:
ISO 565-1990*ISO 8868-1989
Ключевые слова:
ATOMIC ABSORPTION SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT FLUORSPAR LEAD LEAD CONTENT METALLURGICAL INDUSTRY MINERALS SPECTROMETRY ATOMIC ABSO CHEMICAL ANALYSIS AND TESTIN MINERALS AND ORES