Proc. 6th Int. Symp. Instrum. Planar Chromatogr., (Interlaken 1991), Inst. Chromatogr., Bad Dürkheim, FRG, 257-264 (1991). Kinetic performance parameters for several commercial TLC and HPTLC layers are presented. Influences of binder layer thickness and preparation procedures of chemically bonded layers are discussed. A comparison of TLC-layers with slurry packed liquid chromatography columns of the same particle size is given.

J. Planar Chromatogr. 5, 359-363 (1992). TLC of compounds with different molecular structures on silica using binary eluents with a wide range of polarity. Measured retention constants were in good agreement with equations derived from theories of both displacement and liquid - liquid partition phenomena.

J. Planar Chromatogr. 8, 52-62 (1995). TLC of 14 selected isomeric phenol derivatives on silicone impregnated silica with Veronal acetate buffer (pH 7.4) - acetone 65:35 and 60:40. Detection by spraying with tetradiazotized benzidine. Correlation of RM values, partition coefficients, log P, toxicological properties, log 1/CT, and antibacterial activity, log 1/CA with numerical values of the topological indices.

Part XV. J. Planar Chromatogr. 11, 61-63 (1998). Separation of 16 isomeric methylanilines and chloroanilines by TLC on silica gel and on silica gel impregnated with manganese salts and correlation of the pKa values of the compounds with RM values and with the numerical values of topological indexes. Most accurate prediction of the pKa values of the aniline derivatives investigated was achieved by use of biparametric equations employing RM values and the topological indexes °B or 'B. - TLC of aniline derivatives on 1. silica gel with benzene - ethyl acetate - acetic acid 6:3:1; 2. on silica gel impregnated with a 10% aqueous solution of Mn(C2H3O2)?4 H2O with the a.m. eluent. Detection by spraying with 4-dimethylaminobenzaldehyde solution.

Proc. Intern. Symp. on Planar Separations, Planar Chromatography 2001, pp. 75-78. Differential scanning calorimetry and other physico-chemical investigations of chemically bonded phases (RP-8, RP-18, CN and DIOL) at elevated temperatures leading to the conclusion that a weak affect of thermal dissociation of the C-H bonds which occurs with the chemically bonded aliphatic ligands irradiated with the high-power neodymium laser of a Raman spectrophotometer results in a massive effect of the Raman scattering, enabling rapid and reliable estimation of the density of coverage of the silica matrix with the respective aliphatic ligands.

J. Planar Chromatogr. 18, 465-470 (2005). HPTLC of cholic, glycocholic, glycodeoxycholic, chenodeoxycholic, deoxycholic, lithocholic, and glycolithocholic acid on RP-18 W, RP-2, and cyano phases in a presaturated chamber with mixtures of an organic modifier (methanol, dioxane, acetonitrile, acetone) and water in different volume proportions which were varied in steps of 5 % from 35 to 80 %. Detection by spraying with a 10 % aqueous solution of sulfuric acid or by dipping in a 10 % solution of phosphomolybdic acid in ethanol and heating at 120 °C for 20 min. Investigation of relationships between lipophilicity obtained by use of RP-HPTLC, experimental and theoretical partition coefficients, and selected structural descriptors.

J. Planar Chromatogr. 3, 381-385 (1990). The retention of 13 2-nitro-4-cyanophenyl esters and 10 trisubstituted symmetric triazine derivatives was determined on silica layers impregnated with silicone oils of various molecular mass, and vinyl content. The data were evaluated by principal component (PC) analysis performed on the covariance and correlation matrices of the original data set. It was established that the retention of each solute increases with increasing vinyl content, and that the molecular mass has a lower impact on retention than does the vinyl content. Application of multivariate mathematical methods in the evaluation of RP retention data.

I. Regular part of the model. J. Planar Chromatogr. 4, 460-466 (1991). Manual examination of the retardation behavior of 16 apolar, closely related coumarins in normal phase TLC using the regular part of the three-dimensional „PRISMA“ model. The results show a highly significant second order dependency between the retardation factor (Rt) and the solvent strength (vertical correlation), as well as between the retardation factor and the selectivity point (horizontal factor).