Общие методы определения содержания мышьяка. Фотометрический метод с применением диэтилдитиокарбамата серебра
Название (англ.):
General method for the determination of arsenic; Silver diethyldithiocarbamate photometric method
Описание (англ.):
Applicable to determining the quantities contained either in all the test solution or in the aliquot portion of between 1 g and 20 g that is taken for the determination. The principle bases on the 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 producedby the colloidally dispersed silver at the maximum of the absorption curve at a wavelength of about 540 nm.
ARSENIC CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT PHOTOMETRY PHOTOMETRY (CHEMICAL ANALYSIS) CHEMICAL ANALYSIS AND TESTIN SPECTROCHEMICAL ANA