タール色素の製品検査について(第7報)溶媒抽出, 原子吸光法による食用タール色素中の重金属の定量

抄録

A chelate extraction-atomic absorption procedure for the determination of heavy metal contaminants in food coal-tar dyes has been developed by using sodium diethyldithiocarbamate as the chelating reagent. This method can be adapted to the sample without digestion, and Fe (III), Zn (II), Cr (VI), Pb (II), Cu (II), Cd (II), and Mn (VI) were quantitatively extracted from aqueous solution of food dye into butyl acetate by one extraction. Therefore, official inspection of coal-tar dyes could be carried out more speedily by this method than the method adopted in Japanese Standards of Food Additives.