無機薄層クロマトグラフィーの研究(第11報) : 金属ジチゾネートの薄層クロマトグラフィー(その2)

概要

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A method for the separation and identification of fourteen metal ions with dithizone extraction and thin-layer chromatography was investigated. From a solution containing various metal ions, dithizonates of Pd^<2+>, Hg^<2+>, Cu^<2+> and Ag^+ were extracted with 0.1% CHCl_3 solution of dithizone at pH 0-1,and then those of Bi^<3+>, Cd^<2+>, Co^<2+>, Ni^<2+>, Pb^<2+> and Zn^<2+> at pH 7-8,and lastly, those of Tl^+, Fe^<2+>, Mn^<2+> and Sn^<2+> at pH 9-10. The dithizonates extracted at pH 0-1 and 7-8 were separated on MN-silica gel S-HR layer by using CCl_4-CH_2Cl_2-benzene (1 : 7 : 4) and each spot of the dithizonates was detected and identified directly by its characteristic coloration. The dithizonates extracted at pH 9-10 were reextracted with 20% HNO_3,and free metal ions thus extracted were separated on the same kind of layer by using acetone-3_N HCl (99 : 1) and detected by appropriate reagents. Each limiting amount for the identification of metal ions by this method was as follows : 0.2 ppm for Cu^<2+>, Ni^<2+>, Co^<2+>, 0.3 ppm for Hg^<2+>, 0.4 ppm for Pd^<2+>, Ag^+, Cd^<2+>, 0.8 ppm for Zn^<2+>, 3.0 ppm for Pd^<2+>, 5.0 ppm for Bi^<3+>.
公益社団法人日本薬学会の論文
1968-12-30