Determination of Copper in Foodstuffs with 2, 2'-Biquinoline

Abstract

2, 2'-biquinoline was used for the determination of copper in foodstuffs. Analytical results were compared with those obtained by diethyldithiocarbamate method. Presented method was recognized to be more suitable than carbamate method for the following reason: negligible blank value, formation of stable color, less interference by other cations, possibility for determining cuprous and cupric ion separately.