Acta Chromatographica 21(1), (2009). Introduction of a new objective chromatographic response function RK, based on the kernel density estimation, for evaluation of the fingerprinting performance of a particular TLC system (uniformity of retention) for which a large set of experimental hRf values of possible components of the mixture is available. The RK criterion is insensitive to large numbers (hundreds or thousands) of hRf values, can be applied to one and two-dimensional TLC and is easily computed.

J. Planar Chromatogr. 2, 161-162, (1989). Optimization of a ternary mobile phase utilizing generalized equation. Two less polar solvents were mixed 1:1 and a third, more polar solvent added to the mixture to produce mole fractions between 0.1 and 0.9. Chromatographic parameters evaluated via Rm values. For the separation of 1,4- and 1,5-isomers of naphthalene compounds on silica, carbon tetrachloride - chloroform 1:1 with the addition of 0.5 - 0.7 mole fractions of methanol or acetone were found most suitable.

J. Planar Chromatogr. 5, 192-196 (1992). New means of investigating intermolecular interactions between the components of binary, reverse phase chromatography mobile phases and the solutes being analyzed. A statistics-based approach utilizing partial correlation coefficients was chosen.

Part IV. (2001) Proc. Intern. Symp. on Planar Separations, Planar Chromatography 2001, pp. 353-354. Determination of relationships between RF values and mobile phase composition for twenty moderately polar pesticides in systems of the type normal- and reversed phase HPLC and TLC. The optimization of the particular separation parameter of HPLC by preliminary experiments with TLC is an obvious step.

J. Sep. Sci. 33, 2619-2628 (2010). HPTLC of 33 newly synthesized arylpiperazines on RP-18 with 1) methanol - water (with increasing concentrations of methanol from 80-100 %), 2) dioxane - water (with increasing concentrations of dioxane from 60-80 %), and 3) dimethyl sulfoxide - water (with increasing concentrations of dimethyl sulfoxide from 80-100 %). In all cases the organic modifier was increased in steps of 5 %. Quantitative determination by absorbance measurement at 254 nm. A quantitative structure-retention relationship study allowed to understand the chromatographic behavior of similar compounds.

J. Liq. Chromatogr. Relat. Technol. 37, 2814-2828 (2014). HPTLC of arylureas and arylacetamides derivatives on RP-18 with 1-13 % water in dimethylsulfoxide (increment 3 %). Detection under UV 254 nm. A quantitative structure-retention relationship study allowed to investigate the retention behavior of these substances as well as determination of lipophilicity related to the biological activity towards dopamine D2 and 5-hydroxy-tryptamine receptors.

J. Planar Chromatogr. 29, 165-175 (2016). HPTLC of 15 steroid and phenanthrene derivatives on silica gel, RP-18 and CN phase with five binary mobile phases (acetonitrile – water, acetonitrile – dimethyl sulfoxide, acetonitrile – methanol, acetone – petroleum ether, and acetone – water). Quantitative structure‒retention relationships analysis showed the chromatographic behavior of the tested compounds.

J. Planar Chromatogr. 31, 250-256 (2018). HPTLC of fifteen 17β-carboxamide glucocorticoid derivatives and prednisolone on RP-18 with acetonitrile – water (1:1, 3:2, 7:3, and 4:1), acetone – water (1:1, 3:2, 7:3, and 4:1, and 9:1), ethanol 96 % – water (1:1, 3:2, 7:3, and 4:1), methanol – water (3:2, 7:3, 4:1, and 9:1) and tetrahydrofuran – water (1:1, 3:2, 7:3, and 4:1). The system consisting of water and ethanol 96 % was selected as the most suitable for the prediction of octanol – water partition coefficients (log Po/w).