ATOM-ABSORPTION METHOD OF DETERMINATION OF SELENIUM CONTENT IN SOME RAW MATERIALS AND FOOD

Abstract

A novel atom-absorption method of determination of selenium in some raw materials, biological objects and food is proposed. This method involves preliminary extraction and concentrating of the components to be analyzed with butylacetate/sodium diethyldithiocarbamate mixture. The highest extraction degree for Se(IV) and Se(VI) ions is reached for pH ranged from 1 to 6. Investigation of influence of high concentrations of iron and zinc on accuracy of the Se determination proved only insignificant (under 5%) blurring of the Se atom-absorption peaks for Zn admixture contents 0÷6 g/kg and 0÷10 g/kg of Fe.