Глицерин технический. Определение содержания мышьяка. Фотометрический метод с применением диэтилдитиокарбамата серебра
Название (англ.):
Glycerols for industrial use; Determination of arsenic content; Silver diethyldithiocarbamate photometric method
Описание (англ.):
The method is applicable tp products with a content greater than 0,1 mg/kg. It is applied to a test portion as it is, and to another identical portion with a known quantity of arsenic added. The principle consists in reduction of the arsenic by zinc in a hydrochloric acid medium, with the formation of arsine; absorption of the arsine in a solution of silver diethyldithiocarbamate in pyridine.Photometric measurement of the purplish-red colour produced by the colloidally dispersed silver at the maximum of the absorption curve at a wavelength of about 540 nm.
Дата введения:
01.09.74
Дата отмены:
30.05.02
Код КГС:
Л29
Код ОКСТУ:
2422;2409;2632;2609
Код ОКС(МКС):
71.080.60
Код ОКП:
2422;2409;2632;2609
Нормативные ссылки:
BS 5711 PART 10-1979, EQV*NBN T 04-169-1983, EQV*NF T60-369-1980, EQV*NP-1690-1980, EQV*NS 9041-1981, NEQ
Ключевые слова:
ARSENIC CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT GLYCEROL PHOTOMETRY (CHEMICAL ANALYSIS) SPECTROPHOTOMETRIC ANALYSIS SPECTROPHOTOMETRY CHEMICAL ANALYSIS AND TESTIN SPECTROCHEMICAL ANA