J. Chromatogr. 452, 257-264 (1988). Reversed-phase TLC on octan-1-ol-coated cellulose with phosphate buffer (pH 7.4). Study of the behavior of ß-adrenoceptor antagonists, non-steroidal anti-inflammatory agents and dihydropyridine calcium antagonists at 37°C. Measurement of their distribution coefficients using published values. Comparison of the results with published data. Discussion of the applicability of the method.

J. Planar Chromatogr. 3, 264-268 (1990). Comparison of various diluent + modifier - silica systems for 57 solutes by graphical methods; i.e. RM vs. eluent spectra plotted on the basis of equieluotropic series of RM1 vs. RM2 correlations. The spread of points was largest when the binary eluents differed in both diluent and modifier. The differentiated selectivity characteristics of the diluent - modifier binaries demonstrate good prospects for computer-aided selection of an optimal system for TLC analysis of a given set of compounds from the data base.

Chromatographia 35, 275-280 (1993). Determination of the lipophilicity of 14 anti-hypoxia drugs by reverse-phase TLC on paraffin-impregnated silica with 25-60% acetonitrile in steps of 5% containing a changing or constant concentration of buffer. Detection under UV 254 nm. Discussion of the correlation between lipophilicity and the specific hydrophobic surface area of the drugs, and the effect of the concentration of buffer on the retention of the drugs. Comparison of the results with those obtained by reverse-phase HPLC.

Part 1. J. Planar Chromatogr. 9, 430-434 (1996). Investigation of the stability of RP-18 TLC stationary phases, specifically their resistance to cleavage of the chemical bonds coupling the octadecyl ligands to the silica matrix using methanol - phosphate buffer (pH 3) solutions, repeatedly passed through the layer. It was demonstrated that cleavage of about fifty percent of octadecyl ligands from the matrix occurs in the course of the initial two runs of the methanol - phosphate buffer solutions through the RP-18 layer, and after this the stationary phase remains stable.

J. Shenyang Univ. Pharm. (Shenyang Yaoke Daxue Xuebao) 16, 44-47 (1999). TLC on silica gel impregnated with buffers of different pH values, developed with acetone - cyclohexane 2:3. Measurement of the dissociation constants of the compounds using the Rf-pH curves. Comparison of the results with those obtained by potentiometry and UV spectrophotometry giving good agreement.

J. Planar Chromatogr. 15, 258-262 (2002). Preparative TLC of N,N-dimethylaminoazobenzene, 2,6-dinitroaniline, 5-[(diethylaminophenyl)azo]-phthalimide and 4-nitroaniline on silica gel in a saturated horizontal DS chamber with ethyl acetate - heptane 1:19 and ethyl methyl ketone - heptane 1:19. The investigations were performed in the temperature range of 20-40°C. A very significant increase in the efficiency of separation was achieved at higher temperatures. Densitograms used for the presentation of data were scanned in reflectance mode at 400 and/or 500 nm.

J. Planar Chromatogr. 3, 216-221 (1990). Solvent systems for the separation of either steroids or esters of dansyl amino acids in both one-dimensional (1-D) and two-dimensional (2-D) planar chromatography solvent systems are ranked on the basis of simulations of optimized separations, the quality of which is quantified using suitable separation functions. The paper discusses the correlation between solvent ranking in the 1-D and the 2-D mode based upon either the solvent ranks or the actual values of the separation functions. The simulated separations are based on experimental results obtained using either TLC or overpressured layer chromatography.

J. Planar Chromatogr. 5, 334-337 (1992). Discussion of the possibility of calculating optimum values of the differences in chromatographic parameters for the components of separated mixtures on the basis of a retention model based on the law of mass action. The comparison of calculated values with those obtained experimentally on silica eluted with various mixed mobile phases has demonstrated the usefulness of the method.