J. Liq. Chrom. & Rel. Technol. 22, 77-82 (1999). Calculation of Rf values of 10 antioxidants (several UOP, Permanax, Antozite etc.) on the basis of their structures and comparison with experimental Rf values, obtained on RP TLC plates. This approach allows a positive identification without reference substances or with a limited number of standards.

Proc. Intern. Symp. on Planar Separations, Planar Chromatography 2001, pp. 299-300. The results of retention of several model substances (phenols, anilines and quinoline bases) obtained on polar bonded stationary phases such as cyanopropyl, diol and aminopropyl in aqueous eluents of different concentrations were fitted into three equations (Soczewinski and Wachtmeister, Schoenmakers and coworkers and Snyder-Soczewinski) in order to find the best equation to describe retention-mobile phase concentration relationships in reversed phase systems on polar bonded phases.

Acta Chromatographica 14, 102-109 (2004). Investigation of the chromatographic behavior of amoxicillin, ampicillin, cephalexin, cloxacillin, doxycycline, tetracycline, erythromycin, gentamycin, streptomycin, and co-trimoxazole on titanic silicate inorganic ion-exchanger with organic, aqueous, and mixed aqueous organic mobile phases. Achievement of rapid separation of one antibiotic from numerous other antibiotics, as have many binary and ternary separations. Demonstration of the dependence of Rf values on the salt concentration of the mobile phase, and the existence of a linear relationship between FM and molarity of (NH4)2SO4 for some antibiotics in salting-out TLC using aqueous ammonium sulfate solution. Study of the effect of varying volume ratios of the binary mobile phase methanol - 0.1 M formic acid on the Rf values.

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.