Application of a micro computer program to the thin-layer chromatographic separation of some diastereoisomers on silica. J. Chromatogr. 438, 219-224 (1988). TLC of 4 diastereoisomeric amino esters and isochromans on silica with 21 mobile phases composed of 2-6 solvents and selected by means of a microcomputer program based on Snyder’s displacement model. Discussion of the effect of the variation of the mobile phase on the relative retention of each diastereoisomeric pair and on the relative separation as predicted by theory.

J. Planar Chromatogr. 3, 24-33 (1990). Method for the estimation of partition coefficients of both neutral and basic PAH. RP-TLC of 63 compounds on C-18 and KC 18-bonded silica with mixtures of methanol – deionized water or methanol – 0.063 M phosphate buffer (pH = 7). RM data may be predicted from structural descriptors, such as molecular connectivities and calculated partition coefficients.

J. Planar Chromatogr. 5, 424-430 (1992). Investigation of the retention of higher fatty alcohols and acids in RPTLC with bonded alkyl stationary phases and water - methanol eluents. Adapting a theoretical approach introduced previously (T. Kowalska, Chromatographia 27, 628-630 (1989)), it has been possible to determine not only the contribution of the solutes’ methylene, hydroxyl, and carboxyl structural groups to overall retention, but also their effects on a mixed retention mechanism involving the chemically bonded alkyl groups and the remaining part of the solid matrix.

J. Chromatogr. 672, 203-211 (1994). Test of the ability of the molecular connectivity model to predict Rf values in TLC for a group of sulfamides using multi-variable regression equations with multiple correlation coefficients, standard error of estimate, F-Snedecor function values and Student's t-test as criteria of fit. Prediction of the values for this property in different silica and different polar mobile phases by using the molecular connectivity model. Discussion of the relationship between structural features of sulfamides and the Rf values in TLC.

J. Planar Chromatogr. 8, 47-51 (1995). TLC of 10 barbituric acid derivatives on DTMA impregnated silica with mixtures of water and methanol. Visualization under UV 254 nm. Densitometry at 254 nm.

J. Chromatogr. Sci. 34, 376-378 (1996). TLC of nitro compounds on silica with different solvents. Investigation of the relationship between the Rf values and solvent polarities, giving a linear function in different solvents.

J. Planar Chromatogr. 10, 434-440 (1997). Investigation of the retardation behavior of ten closely related cyanobacterial hepatotoxins by parts I and II of the PRISMA system, operating in the irregular part of the PRISMA model. The mobile phase combination and the area of the triangular plane to be studied were selected in preassays and the retardation behavior was studied at sixteen selectivity points. The retardation of all the toxins followed a second-order function with high correlation. The three-dimensional retention surfaces described the mobility and the structural variances of the toxins. Cyanobacterial hepatotoxins behaved predictably in the selected system in the irregular part of the PRISMA model. HPTLC of 10 microcystins on silica with varying ratios of solvents. Densitometry at 240 nm.

Chinese J. Chromatogr. (Sepu) 17, 18-20 (1999). Determination of the Rf values of 24 phenol and aniline derivatives on silica with mixtures of hexane - ethyl acetate in various proportions. Classification of the compounds into two species with different features by oblique factor analysis. Discussion of the effects of the molecular structure on the retention value for the two species. Multi-parameter regression analysis of Rf values with the topological indexes, showing good correlation for both groups.