J. Planar Chromatogr. 20, 259-260 (2007). Investigation of the effects of two-component mobile phases (carbon tetrachloride-methanol, chloroform-methanol, dichloromethane-methanol and chlorobenzene-methanol) on the separation of porphyrins. The results were characterized by determination of the Rf values. TLC of five porphyrins (porphin, 5,10,15,20-tetra(4-methoxyphenyl)porphyrin, 5,10,15,20-tetra-(4-pentyloxyphenyl)porphyrin, 5,10,15,20-tetra(4-decyloxyphenyl)porphyrin), and 5,10,15,20-tetra-4-hexadecyloxyphenyl)porphyrin) on RP-18. Optimum separations were obtained by use of 5:5 mixtures.

J. Planar Chromatogr. 25, 208-213 (2012). The phenomenom of lateral relocation in the migration tracks of chiral analytes was reviewed as a retention fundamentals in TLC. By employing silica gel plates and others impregnated with L-arginine and DL-arginine, the non-linear motion of (±)-2-phenylpropionic acid was studied. TLC on impregnated or non-impregnated silica gel (pre-washed by development with methanol – water 9:1) with acetonitrile - methanol - water 20:4:3. For plates impregnated with arginine, the mobile phase additionally contained 0.5 % (v/v) glacial acetic acid to set the pH to < 5.

J. Planar Chromatogr. 28, 119-125 (2015). The goal of this quantitative structure-retention relationship study was to investigate the retention behavior and to characterize the lipophilicity of 16 guanidine and imidazoline derivatives by TLC on RP-8 with methanol–water–ammonia (in different volume ratios), simulating the n-octanol–water partition system. Detection by absorbance measurement at 254 nm. Three different modeling methodologies (stepwise MLR, PLR, ANN) were tested. The stepwise MLR could be used as the most reliable model for prediction of retention behavior in the examinated RP-TLC system.

J. Planar Chromatogr. 30, 219-224 (2017). HPTLC of 18 derivatives obtained by substitution of chlorine atom at C7 or/and C6 in 6,7-dichloro-5,8-quinolinedione on RP-18 with a mixture of acetone and _x000D_water solution of buffer Tris (pH 7.4) in different volume compositions ranged from 30 % to 85 % in 5 % increments. The correlation between experimental and calculated values of lipophilicity was analyzed.

Proc. Intern. Symposiumon TLC with special Emphasis on OPLC, Szeged, 13 (1984). TLC of 2,3-dimethylaniline, 3,4-dimethylaniline, 3,5-dinethylaniline, 2,5-dimethylaniline, 2,6-dimethylaniline, 2,4,6-dimethylaniline on silica with dichloromethane. Correlation between chemical structure and retention behaviour on silica.

V. Danube Symposium on Chromatography, Yalta, November 11-16, 1985. TLC on silica, impregnated with 5 % paraffin oil in hexane, developed with methanol - water with different organic phase ratio in the mobile phase.

J. Chromatogr. 365, 145 -153 (1986). Investigation of the relationships between logarithmic retention factors and carbon atom numbers for some homologous series of the title compounds in TLC and GC systems. The chromatographic behaviour of the compounds could be explained on the basis of their structural properties. Reversed-phase. RM values and Kovßts retention indices showed linear correlation with the carbon atom numbers of homologous species. In silica chromatography, these correlations were non-linear in several cases.

J. Chromatogr. 475, 321-329 (1989). Reversed-phase TLC of aromatic alkoxy and hydroxy acids on octadecyl-bonded silica with mixtures of phosphate buffer and methanol. Correlation of RM in TLC with log in HPLC. Examination of the elution order with respect to the structures of the acids. Use of the experimental data to optimize the separation of the acids.