J. Planar Chromatogr. 13, 254-256 (2000). Study of the physicochemical fundamentals of planar analytical test methods with analytical reagents forming poorly soluble products on reaction with the target compound. In the test methods the analytical reagent was applied to a porous planar system (paper, or an adsorbent layer spread on a support). It was shown that regularities in the planar test methods are similar to those observed in planar chromatography.

Chromatographia, 72(11-12), 1169-1176 (2010). Experimental and theoretical study of the adsorption kinetics of the gas phase of solvents most often used in TLC (methanol, acetic acid, ethyl acetate, toluene, chloroform, and acetone) in the N-chamber (the chamber most often used for analytical TLC, in 95 % of publications). To describe the kinetics an equation is proposed, which relates the solvent vapor adsorption to the time, the vapor pressure in saturated chambers and the diffusion coefficients of the solvents. It was found that as the characteristics of the adsorbent layer substantially improved by the manufacturers, the weight of mobile phase adsorbed by plates has increased several fold.

J. Liq. Chromatogr. Relat. Technol. 37, 829-840 (2014). HPTLC of 16 alpha adrenergic and imidazoline receptor ligands on RP-18 and CN phases with methanol - water for RP-18 and tetrahydrofuran - ammonia - water for RP-18 and CN. A quantitative structure-retention relationship study allowed to investigate the retention behavior of these substances.

J. Planar Chromatogr. 29, 113-120 (2016). HPTLC of eight steroids (trans-androsterone, methyltestosterone, testosterone, progesterone, cortisone, hydrocortisone, estrone, and β-estradiol) on silica gel with four different binary mobile phases (acetonitrile – water, acetonitrile – dimethyl sulfoxide, acetone – petroleum ether, and acetone – water in steps of 10 %). The retention behavior was studied using quantitative structure–retention relationships.

J. Planar Chromatogr. 30, 340-349 (2017). HPTLC of aripiprazole and its nine impurities as well as ziprasidone and its five impurities on RP-18 with methanol (1) or ethanol (2) as organic modifiers in the mobile phase. When methanol was used as organic modifier, the mobile phase with the lowest content of methanol was methanol – water – ammonia solution 25 % 13:6:1 and the mobile phase with the highest content of methanol was methanol – water – ammonia solution 25 % 17:2:1. When ethanol was used as organic modifier, the mobile phase with the lowest content of ethanol was ethanol – water – ammonia solution 25 % 12:7:1 and the mobile phase with the highest content of ethanol was ethanol – water – ammonia solution 25 % 16:3:1. Lipophilicity was estimated to develop the quantitative structure–retention relationship (QSRR) models which enabled fast and reliable prediction of the retention behavior.

Budapest Chromatography Symposium; June 13, 1985.

J. Chromatogr. 347, 303-309 (1985). Study on HPTLC behaviour of phenylethylamines and phenolic acids on silanized silica impregnated with N-dodecylpyridinium chloride, or with dodecylbenzenesulfonic acid. The presence of KCl makes the spots more compact. The presence of 1 or more OH groups in the molecule decreases the retention of the compounds, whereas an opposite behaviour occurs with replacement of a phenolic group with an OCH3 group. Secondary amines are more strongly retained than primary amines. The N-CH3, groups increase the affinity of the compounds towards the exchanges in the order: primary amine secondary amine tertiary amine. Phenylethylamines, phenolic acids, silanized silica, ammonium tungstophosphate

J. Planar Chromatogr. 1, 128-134 (1988). Studies of the chromatographic behavior of some heavy metal ions by TLC on silica with formic acid - sodium formate systems. Discussion of the effect of the mobile phase combinations on the mobility of metal ions. Calculation of some TLC parameters for Zn-Cd, Zn-Ni and Zn-Co separations.