J. Sep. Sci. 41, 4387-4393 (2018). A new separation layer for TLC plates was developed for the separation in thin layers and direct conjugation to matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) without additional sample preparation. Best results were obtained with layers containing 19 to 29 % glycidyl methacrylate in the initial polymerization mixture.

(Thin-layer chromatographic enantiomeric resolution via ligand exchange.) GIT-Suppl. 3, 6-12 (1986). Separation of enantiomeric amino acids and dipeptides on reversed phase silica gel covered with a chiral selector (proline derivative). Typical developing solvents: methanol - water - acetonitrile 5:5:20 (running time 30 min) and 5:5:3 (running time 90 min).

J. Chromatogr. 365, 289-296 (1986). TLC of methylated lysine and arginine derivatives on various silicas with various aqueous salt solutions. Investigation of the influence of the origin of silica, impregnation and salt quality on chromatographic performance. The origin of the silica has a dominant influence on chromatographic performance, and the effect of impregnation and salt quality are of secondary importance.

J. Planar Chromatogr. 2, 158-160 (1989). TLC of lypophilic fraction of hydrobionts on different commercial plates with various physical characteristics. For hydrocarbons (hexadecylbenzene, dimethyl naphthalene, phenanthrene and 3,4 a-benzopyrene) the selectivity does not change with the grain diameter of the sorbent (5 - 25 µm). The Rf-value is markedly influenced by chamber saturation and specific surface areas. Plates containing a silicium acid sol as binder may be used 10 - 12 times after regeneration (increase of reproducibility).

Chromatogr. Sci. 52, 5-137 (1990). A review with 80 references on TLC stationary phase, such as silica gel, alumina, Kieselguhr, cellulose, polyamide, chemically bonded gels, etc.

J. Planar Chromatogr. 3, 169-172 (1990). Investigation of the chromatographic behavior of a wide range of compounds (ecdysteroids, dihydroxybenzoic acids, aromatic amines and N-oxides, paracetamol and metabolites) on silica and diol-bonded silica with solvent systems based on chloroform containing varying proportions of ethanol to adjust the eluotropic strength. Clear and useful differences in selectivity between the two layers were observed. The diol phase gave greatly superior results for the chromatography of the dihydroxybenzoic acids as compared to silica gel.

Consideration of separation mechanisms of some aliphatic and aromatic amines. J. Chromatogr. 609, 419-422 (1992). Investigation of the chromatographic behavior of ten aliphatic and aromatic amines on polyacrylonitrile layer with seven aqueous solvent systems. Discussion of the separation mechanisms.

J. Planar Chromatogr. 7, 480-484 (1994). TLC of amino acids on silica impregnated with a variety of sulfates, oxides, acetates, thiocyanates, chlorides, carbonates, nitrates of transition metals with butanol - water - acetic acid 4:2:2. The systems reported were considered as improvements with regard to the number of amino acids resolved from a complex mixture and can be used successfully for the analysis of unknown mixtures. Detection by spraying with ninhydrin solution and heating at 80-100 °C for 5-10 min.