Anal. Chem. 72, 1759-1766 (2000). TLC of n-alkanes and of components with partially aliphatic structure (e.g. fatty acids, cholesterol, prostaglandins, ceramides, geraniol, and propylene glycol) on berberine-impregnated silica with n-hexane. Densitometry in the fluorescence mode at 356 nm. Proposal of an explanation for the alkane-mediated enhancement of berberin fluorescence: The alkanes create an apolar microenvironment for the excited berberine cation, which lowers the dielectric constant around berberine and hinders alternative relaxation mechanisms, thus favoring fluorescence emission. This interaction of the berberine cation is much stronger than in the case of uncharged p-acceptor molecules like caffeine and tetranitrofluorenone. Analytes with a partially aliphatic structure give also an increase in fluorescence signal.

J. Planar Chromatogr. 18, 13-18 (2005). Re-investigation of the initial stage of the retention process in TLC, namely the moment of the first contact between the analyte deposited at the origin and the mobile phase employed. Presentation of the results obtained in two different ways, i. e. as the dependence of densitometrically measured concentration profiles and of retardation factors (RF) on the amount of analyte and on the mode of application (dry or wet) to the stationary phase layer.

Chromatography the State of the Art, Vol. II, Akademiai Kiado, Budapest 1985, 719-730. Determination of RM values by means of reversed-phase TLC. The linear correlation between the intercepts and slopes of TLC and HPLC straight lines could be used to check chromatographic data. TLC on silica with aq. sodium acetate- Veronal buffer 0.14 M, pH 7.0 with different quantities of methanol; always saturated with silicone. Staining with alkaline potassium permanganate and heating at 120 °C.

J. Liquid Chromatogr. 14, 3197-3212 (1991). Study of theoretical predictions of separation results in TLC and HPTLC by using thermodynamic data of adsorbent - binary solvent-substance systems. Suggestion of using TLC as a method for optimizing chromatographic processes.

J. Planar Chromatogr. 8, 420-426 (1995). Introduction of a thermodynamic definition of a mixed (adsorption - partition) mechanism of solute retention in liquid chromatography on chemically bonded alkyl stationary phases, together with a practical example of how to quantify the complementary contributions, which certainly differ from one solute to another. - TLC of 5 higher fatty alcohols (lauryl, myristyl, cetyl, stearyl, and arachidyl alcohol) on silica with mixtures of 2-propanol - hexane, heptane, or octane, and t-butanol - hexane in different proportions. Detection by spraying with a 0.1% solution of Rhodamine B in water.

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.