食品中微量重金属定量のためのキレート樹脂による分離濃縮

概要

論文の詳細を見る
A method is described for separation and concentration of trace amount (<20μg) of Mn(II), Fe(III), Co(II), Ni(II), Gu(II), Zn(II), Cd(II), and Pb(II) coexisting with large amount of Ga(II), Mg(II), Na(I), and K(I) using chelating resin Unicellex B. The pH of sample solution obtained by digestion of food is adjusted to 5 in 0.1 mol dm^<-3> acetate buffer solution, then passed through the Unicellex B column for retention of heavy metals except Fe(III). Ca(II) and Mg (II), which were retained on the column at pH 5, are previously eluted with 0.5 mol dm^<-3> malate buffer solution (pH 5) and then heavy metals are eluted with 3 mol dm^<-3> Hd. Otherwise only Fe(III) and Cu(II) are retained on the column at pH 2 in 0.1 mol dm^<-3> maleate buffer solution and eluted with 3 mol dm^<-3> HC1. Heavy metals in the effluent are determined by Zeeman atomic absorption spectrophotometry. According to the procedure, 5〜20 jig of heavy metals in 1 dm^3 of synthetic sample solution containing each 1 g of Ga(II), Mg(II), Na(I),and K(I) were quantitatively recovered in 10 cm^3 of the effluent except Mn(II). The proposed method was applied to the determination of the heavy metals in NBS 1571 Orchard Leaves and some foods successfully.
社団法人日本分析化学会の論文
1984-09-05