Quantitative analysis of metallic ions by densitometry of thin layer chromatograms

Studies on inorganic thin layer chromatography. VIII

Abstract

Thin layer chromatography was carried out on 12 common metallic ions, i e., [A] Pb(II), Cr(III), Mn(II), Ni(II), Cu(II), Co(II), [B] Hg(II), Zn(II), Bi(III), Fe(III) and [C] Ba(II), Sr(II). Ions of A, B, and C groups were developed, respectively, with acetone-3 N HCl(99 : 1), n-butanol-benzene-1 N HNO₃-1 N HCl (50 : 46 : 2.6 : 1.4) and n-butanol-methanol-conc. HCl (10 : 80 : 10). The chromatograms obtained by appropriate color reagents were applied to the densitometric determination of respective ions. Standard error of mean (S. E. M.) 0.22.1 was not small, but the method seemed to fit for the semiquantitative dedetermination. In the area method of chromatographic determination, most ions showed a linearity between the logarithmic quantity (log W) and the square root of the spot area (√A).