(Thin-layer chromatography-liquid chromatography, an ideal supplement. demonstrated by the separation of lanthanoids.) Fresenius Z. Anal. Chem. 318, 198-200 (1984). TLC of lanthanoids with mixtures of ether THF, bis-(2-ethylhexyl) phosphate, nitric acid. Detection by radioactivity.

Chromatogr. Sci. 55, 463-539 (1991). A review with 217 references on TLC of inorganics and organometallics.

J. Planar Chromatogr. 18, 160-163 (2005). TLC of rare earths (La(III), Ce(III), Pr(III), Sm(III), Gd(III), Er(III)) on silica gel and silica gel impregnated with 2.5 M ammonium nitrate with different mixed mobile phases containing di(2-ethylhexyl)dithiophosphoric acid as a complexing agent. The best results were obtained by use of ethyl methyl ketone - tetrahydrofuran - 1 M di(2-ethylhexyl)dithiophosphoric acid 17:8:1. Double development was used to obtain better separation of consecutive rare earths.

J. Chromatogr. A 1446, 141-148 (2016). Investigation of stationary phase gradients for chelation TLC as a tool to separate a mixture of metal ions. Preparation of the gradient stationary phases using controlled rate infusion from precursors containing mono-, bi-, and tri-dentate ligands, specifically 3-aminopropyltriethoxysilane, N-[3-(trimethoxysilyl)propyl] ethylenediamine, and N-[3-(trimethoxysilyl)propyl] diethylenetriamine. Confirmation of the presence and the extent of gradient formation using N1s X-ray photoelectron spectroscopy. The results showed that the degree of modification was dependent on the aminosilane precursor, its concentration, and the rate of infusion. Comparison of the separation of four transition and heavy metals (Co2+, Pb2+, Cu2+, and Fe3+) by TLC on gradient and uniformly modified plates with a mobile phase containing a stronger chelating agent, ethylenediaminetetraacetic acid. Manipulation of the retention of the metal ions by varying the surface concentration of the chelating ligands. The order of retention on unmodified plates and on plates modified with a monodentate ligand was Fe3+>Cu2+∼Pb2+∼Co2+, while the order of retention on plates modified with bi- and tri-dentate ligands was Fe3+>Cu2+>Pb2+∼Co2+. Fe3+ and Cu2+ were more sensitive to the concentration of chelating ligand on the surface and showed lower hRf values with increasing ligand concentration than Pb2+ and Co2+. Complete separation was achieved using a high concentration of the tridentate ligand coupled with a longer time for modification, giving a retention order of Fe3+ > Cu2+ > Co2+ > Pb2+.

J. Liquid Chrom. 8, 2969-2989 (1985). Separation of Re(VII), Mo(VI) and V(V) ions on alumina with aliphatic alcohols - HCl mixtures. Visualization with 10 % solution of Tin(II) chloride in 6 N HCl and with 50 % aq. NH4SCN solution.

Chromatographia 23, 477-480 (1987). TLC on cellulose with ethanol - nitric acid - hydrochloric acid 9:2:1. Detection by spraying with 5% sodium diethyl-dithiocarbamate. Quantification after elution by spectrophotometry at 480 nm and 430 nm, resp.

J. Chromatogr. 456, 346-350 (1988). TLC on silica with dry single and multi component solvents.