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 fumes of sulfuric acid, extracting the antimony 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 217,6 nm. Applies to products having an antimony content equal to or greater than 0,001 % (m/m).
Заменяет стандарты:
ISO 9504(1990.06)
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:
ANTIMONY ATOMIC ABSORPTION SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT FLUORSPAR METALLURGICAL INDUSTRY MINERALS SPECTROMETRY ATOMIC ABSO CHEMICAL ANALYSIS AND TESTIN MINERALS AND ORES