J. Planar Chromatogr. 12, 421-424 (1999). Study of the interaction of fourteen hydrazines with Trp, Ser, Leu, Val, Gly, Phe and BSA by charge-transfer reversed-phase TLC. TLC of hydrazines on silica gel impregnated with paraffin oil 19:1 solution in n-hexane by overnight pre-development. The mobile phase was acetone- water 3:2. For the determination of the lipophilicity the mobile phase contained the chosen amino acid in different concentrations. Detection through the strong intrinsic color of the compounds.

Proc. Intern. Symp. on Planar Separations Plan. Chrom. 347-355 (2003). Discussion of a model of chromatographic process which takes into account molecular interactions in mobile phase. TLC of i.e. 2-, 3-, 4-nitroaniline, 4-nitro-2-, 2-nitro-4-, 5-nitro-2-toluidine, 2-, 3-nitrotoluene, 2-, 4-chlorophenol, 2-, 4-nitrophenol, 2,3-, 2,4-, 2,5-, 2,6-dichlorophenol, and naphthalene on silica gel with benzene - acetone, benzene - methanol, carbon tetrachloride - ethyl acetate, and toluene - isopropanol.

J. Planar Chromatogr. 21, 315-323 (2008). The role of the mobile phase in controlling selectivity for adsorption chromatography - with either thin-layer plates or columns - is reviewed and expanded. The use of different solvent mixtures of varying selectivity in normal-phase chromatography is now on a firm theoretical and practical basis. The choice of a more polar component (B-solvent) of a binary solvent mixture (A/B) largely determines relative retention and resolution. Maximum differences in selectivity are achieved by the use of two mobile phases where the B-solvent is either very polar (requiring a lower % B for desirable values of k) or relatively nonpolar (requiring a higher % B).

J. Planar Chromatogr. 3, 425-528 (1990). It is proposed the RM values of substances analyzed on silica with tertiary mobile phases may be predicted from one-parameter regression equations. Experimental RM values for a group of isomers investigated have been compared with theoretical values calculated both on the basis of the author’s own studies (RMy = f(RMx)), and from Oscik’s theory. Substances chromatographed: o-, m- and p-isomers of aminophenol, ethylphenol, cresol, nitroaniline, nitrophenol, toluidine, chloroaniline, chlorophenol, nitrotoluene, chlorotoluene.

J. Planar Chromatogr. 6, 66-69 (1993). Use of a computer-assisted method to select the optimum mobile phase composition for the HPTLC separation of an unknown mixture of a pesticide intermediate. The method is based on spot order identification, by comparison of the UV spectra of spots, followed by single-factor optimization. Excellent agreement was obtained between predicted data and experimental results.

Chinese J. Chem. 14, 354-358 (1996). Presentation of a computer-assisted method for optimization of mobile phase composition and development distance in gradient two-step development HPTLC. The method is based on a system which can predict the final Rf values for gradient two-step development from values measured using five preliminary runs. The statistical scanning method is then used for optimization, using Rf difference as the selection criterion. The method was evaluated using a mixture of eight components and showed excellent agreement between predicted and experimental results.

J. Planar Chromatogr. 13, 337-347 (2000). HPTLC on cyano phases with five binary and ten ternary mobile phases containing methanol, acetonitrile, and water. A retention model was formulated at each composition using the solvation-parameter model. A mixture-design approach was then used to model the individual system constants as a continuous function of mobile phase composition, producing system surfaces from which retention surfaces could be calculated for method development. Regression analysis for the full data set indicated that the mixture-design models can be used to estimate solute migration properties with accuracy similar to that of the original solvation-parameter models.

Trends Anal. Chem. 81, 51-62 (2016). Review on aspects to consider during calibration for quantitative chromatographic analysis such as noise and detector response, data acquisition and processing, calibration curve and inverse calibration.