Thin-Layer Chromatographic Separation, Identification, and Determination of ...

Published: Journal of Chromatographic Science, Volume 33, Number 3, March 1995, pp. 143-147.

Thin-Layer Chromatographic Separation, Identification, and Determination of Certain Anions
Ali Mohammad, Sharad Tiwari, and Jay Pal Singh Chahar

The retention behavior of 19 anions on plain, impregnated, and mixed adsorbent layers of silica gel G, alumina, cellulose microcrystalline, kaolin, and kieselguhr G are examined in aqueous solvent systems. The analytical potential of water, a nontoxic eluant, is explored for its applicability as a simple, inexpensive, and easily available developer in liquid layer chromatography. Better separations of anions are achieved on cellulose with HCl–acetone (1:9) as the eluant and on a cellulose and alumina (1:2) mixed bed with water. The semiquantitative determination of I–, Br–, and NO₂– are attempted. The limits of identification for I–, Br–, NO₂–, SCN–, Br_O3–, IO₄–, IO₃–, CrO₄²–, and PO₄³– are also determined.

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