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. Liquid Chromatogr. 6, 1253-1264 (1983). Study of absorption behaviour of 47 metal ions in aq. HCl systems using stannic arsenate layers. The effect of solvent pH on Rf along with the complexation effect of HCl has been investigated. On the basis of Rf values the Ksp of some metal arsenates have been predicted. HCl has been utilized to resolve some binary and ternary mixtures.

J. Planar Chromatogr. 11, 457-459 (1998). Description of a preconcentration method based on continuous elution and intense thermal desorption of the main volatile component in a narrow zone on the plate. A fiftyfold concentration of a model dye mixture from an aqueous solution was achieved on a TLC plate in 20 - 30 min. Silica gel, propan-2-ol as mobile phase and quantitation by densitometry at 530 nm. The technique enables determination of the amounts of common metals in drinking water.

J. Planar Chromatogr. 23, 156-161 (2010). TLC of aluminium, silicon and iron on microcrystalline cellulose, on silica gel and combinations with aluminium oxide. Mobile phases used were 1:1, 7:3, 9:1, and 8:2 mixtures of 10 % aqueous solutions of sodium chloride, potassium chloride, potassium bromide, and sodium formate with 10 % aqueous formic acid, and 1:8 mixtures of 1 % aqueous sodium molybdate with 3 %, 4 %, and 5 % hydrochloric acid. Aluminium(III) was detected by spraying with 0.05 % aqueous aluminon (triammonium aurin tricarboxylate). Aqueous potassium ferrocyanide in 10 % aqueous sodium formate solution was used for the visualization of iron(II). Silicon was detected by spraying with 1 % sodium molybdate at pH 0.80-0.92. Quantitative determination by scanning densitometry at 402 nm for silicon, at 528 nm for aluminium and at 620 nm for iron. LOD was 7-10 ppm for aluminium(III), 2-5 ppm for iron(II), and 4-6 ppm for silicon(IV).