J. Planar Chromatogr. 7, 291-293 (1994). The new retention model originally developed for reverse phase liquid chromatographic systems employing acetonitrile - water mobile phases has been adapted for description of solute retention in analogous systems using acetonitrile - phosphate buffer mixtures. The basic physical relationships of this approach have been experimentally tested, and excellent agreement found between theory and practice of the phenomenon considered.

J. Planar Chromatogr. 10, 353-357 (1997). The concepts of eluent strength and eluotropic series relate to adsorbent activity as a singular property of a given stationary phase, indirectly implying that independent of the adsorbent applied the retention mechanism is governed by one type of active site only. This assumption can hardly be applied for elucidation of experimental results obtained from systems employing adsorbents with more than one type of active site like e.g. alumina. It was demonstrated that for these more complicated stationary phases a single-value eluotropic series of solvents is to some extent misleading.

J. Chromatogr. A 903 (1/2), 211-217 (2000). Use of planar chromatography with electroosmotic flow to separate either a mixture of dyes using 80% ethanol or a mixture of miscellaneous compounds using 45% aqueous acetonitrile as mobile phase. Both mobile phases are 1.0 mM in N-[tris(hydroxymethyl)]-3-aminopropanesulfonic acid (TAPS) buffer. Presentation of the respective relationship between migration velocity and applied potential and between analysis time and distance migrated. Discussion of the merits compared to conventional TLC.

J. Planar Chromatogr. 17, 186-191 (2004). TLC of sixteen new herbicides (7 2-(chlorophenoxy)acyl derivatives like e.g.methyl 2,4-dichlorophenoxyacetate, methyl 2-(2,4,5-trichlorophenoxy)propionate and 9 N-aryltrichloroacetamides like e.g. N-(4-chlorophenyl)trichloroacetamide, n-trichloroacetanilide, trichoroacetanilide) on RP-18 with aqueous buffer - methanol mixtures in saturated sandwich chambers. A Reprostar 3 video camera and Videostore software were used for visualization and evaluation of chromatograms.

J. Chromatogr. A 1558, 77-84 (2018). Investigation of the influence of concentration of ion-pairing additive, as well as concentration and type of organic modifier of the mobile phase on migration of peptides in a pressurized planar electrochromatography (PPEC) system with octadecyl silica-based adsorbent. Comparison of the results with those obtained by similar HPTLC and PPEC systems. Discussion of the influence of particular variables on retention, electrophoretic mobility of solutes and electroosmotic flow of the mobile phase, of the co-influence of these factors on the final selectivity of peptide separation, and of the difficulty of independent optimization of these factors due to their impact simultaneously on the retention, the electrophoretic mobility, and the electroosmotic flow. The pH of the mobile phase was the main variable for optimization of the PPEC system. Extensive tailing of peptide zones in the PPEC was observed in comparison to similar HPTLC systems.

Chinese Anal. Chem. (Fenxi Huaxue) 19, 1085-1088 (1991). Investigation of a method for rapid selection of the optimal solvent combination in TLC, by using a plot of Rf values against solvent polarity. Some examples.

Chromatographia 36, 330-336 (1993). Presentation of equations for the final Rf values for mobile phase gradient multiple development. Computer simulations of gradient development for both modes of TLC for the preliminary optimization of gradient programs.

J. Planar Chromatogr. 10, 411-415 (1997). Description of a simple method developed for optimization of multicomponent mobile phases. The method is based on seven isocratic experiments with binary, ternary, and quaternary mobile phases. hRf values were used as simple optimization criteria. Quaternary mobile phases usually contained weakly polar solvents as the so-called 'strength moderator'. The influences on the chromatographic separation of mobile phase strength and of the kind of moderator were demonstrated.