J. Planar Chromatogr. 34, 369-375 (2021). Review of the application of TLC and HPTLC for the analysis of inorganic anions between 1995 and 2020, including separation techniques in multicomponent mixtures.

J. Planar Chromatogr. 33, 89-95 (2020). Thin-layer electrophoresis of inorganic anions F-, Cl-, Br-, I-, IO3-, IO4-, BrO3-, IO3-, Fe(CN)63- and Fe(CN)64- on (1) silica gel, (2) titanium (IV) tungstate and (3) admixture of silica gel and titanium (IV) tungstate 1:1 for 2 h at 100 V using 0.1 M oxalic acid, 0.1 M citric acid, 0.1 M tartaric acid, 0.1 M succinic acid and 0.1 M acetic acid as background electrolyte. Silica gel was effective in achieving binary, ternary and quaternary separations. The magnitude of migration was in accord with the order of lyotropic number.

J. Planar Chromatogr. 32, 265-271 (2019). HPTLC of 24 anions on tri-n-butyl amine (TBA) impregnated silica gel with 13 mobile phases (methanol, dimethylformamide, diisopropyl ether, tetrahydrofuran, 2-propanol, dimethylformamide - methanol 1:1, dimethylformamide - diisopropyl ether 1:1, dimethylformamide - tetrahydrofuran, 1:1, dimethylformamide - 2-propanol 1:1, 0.1 M oxalic acid, 0.1 M tartaric acid, 0.1 M citric acid and 0.1 M succinic acid). The retention behavior was analyzed in aqueous and non-aqueous mobile phases. The hRF values were also correlated with their lyotropic numbers. 20 % TBA-impregnated silica gel was found very effective for binary and ternary separations of anions.
 

J. Planar Chromatogr. 32, 157-163 (2019). HPTLC of lead in the presence of other metal ions and synthetic alloys on 20 % tri-n-butyl phosphate (TBP) or tri-n-butylamine (TBA)-impregnated silica gel with butanol - 8 M nitric acid in varying ratios. Quantitative determination by spectrophotometry of the scratched zone detected with the dithiozone reagent.

J. Planar Chromatogr. 29, 435-445 (2016). TLC of Pb2+, Cu2+, Cd2+, Ni2+, Co2+, and Sn4+ on 0.1 M thiourea-impregnated silica gel with 0.001 M HCl. Pb2+, Cu2+, Cd2+, and Sn4+ were detected with yellow ammonium sulfide solution, whereas Co2+ and Ni2+ were detected with 1 % ammoniacal dimethylglyoxime solution.

Chromatographia 21, 175-178 (1986). TLC of 49 inorganic ions on polyethyleneimine cellulose with 0.01-1.0 mol per liter sulfuric acid and acid-ammonium sulfate. Detection by spraying with 0.05 % arsenazo III solution, or with 0.05 % bromopyrogallol red in 50 % ethanol. Discussion of the chromatographic behaviour.

J. Planar Chromatogr. 10, 48-54 (1997). Description of the application of TLC to the analysis of toxic metals (inorganic and organic mercury, Co, Ni, Pb, Zn, Cd, Cu, Fe, Ag, Bi, Mn, Sn, Cr, Al, Be, As, Sb) in a variety of environmental samples. The period covered is 1960 -1995. Spectrophotometry, titrimetry, AAS, densitometry, fluorimetry, and solvent extraction techniques have been combined with TLC for sensitive identification, quantification, and selective separation of toxic heavy metals present in natural, river, and sea waters, electroplating waste water, sludges, aquatic plants, cosmic dust, air, and airborne dust, etc.

J. Planar Chromatogr. 23, 28-34 (2010). Plates with layers of specified soil were prepared by coating 20 cm × 3.5 cm glass plates by a soil slurry (soil-to-water ratio 1:2) to give layers 0.5 mm thick. The plates were then dried in air at room temperature (30 ± 2°C). TLC of Zn(II) and Cd(II) nitrate on soil plates with 1.0 M magnesium chloride solution in 9.9 mM CTAB (cetaltrimethylammonium bromide) as the optimum mobile phase (of 35 mobile phases). Detection by spraying with dithizone solution (0.1 % in carbon tetrachloride) to obtain dark pink and brick red spots of complexes. The smallest detectable amounts of Zn(II) and Cd(II) on soil layers were 0.69 and 1.0 µg, respectively, for distilled water and 9.0 mM CTAB solution, and 1.2 and 2.5 µg, respectively, for the optimum mobile phase.