J. Planar Chromatogr. 12, 365-372 (1999). Development of a computer program for optimization of mobile phase composition in TLC and examination of this method for chromatography of cyanobacterial hepatotoxins on normal-phase TLC plates and for phenolic compounds on RP layers. HPTLC of microcystins (cyclic heptapeptides) on silica gel with combinations of n-propanol - ethyl acetate - water. Densitometry at 240 nm. TLC of phenolic acids (catechin, ellagic acid, gallic acid, kaempferol, methyl gallate, rutin) on RP-18. Videodensitometry at 254 nm.

J. Planar Chromatogr. 28, 241-247 (2015). TLC of (1) citicoline sodium in the presence of its (2) alkaline degradation products in pharmaceutical oral solution on silica gel with ammonia - ethyl acetate - triethylamine 12:7:1. Quantitative determination by absorbance measurement at 272 nm. The hRF value was 35 for (1) and 10 for (2). Linearity for (1) was between 0.6 and 2.2 µg/zone. The intraday precision was 0.2 % and interday precision was 1.2 % for (1). The LOD and LOD of (1) were 41 ng/zone and 237 ng/zone, respectively.

J. Planar Chromatogr. 10, 290-297 (1997). TLC of miltefosine on silica with chloroform - ethanol - p-toluenesulfonic acid (0.25 mol/L) in NH3 25% 7:4:1. Detection by immersion into a copper(II) sulfate solution (10 g copper sulfate were filled up to 100 mL with 8% phosphoric acid) for a few seconds and heated at 180°C for 20 min. Quantification by densitometry at 500 nm. For detection of 1-octadecanol development in dichloromethane - methanol - 25% NH3 (100:1:0.2), followed by immersion into copper sulfate solution. Validation, specificity, linearity, accuracy, detection and quantification limit, precision, robustness, log P determination, method development, experimental details, and results are described in detail. Also published in Proc. 9th Internat. Symp. Instr. Chromatogr., Interlaken, April 9.-11., 289-303 (1997).

Acta Chromatographica 22 (3), 391-404 (2010). Examination of the effect of conditioning of the silica layer by mobile phase vapor, diethylamine vapor and its aqueous and methanolic solutions, and ammonia vapor on the retention of alkaloids eluted with multicomponent non-aqueous mobile phases. Investigation of the effect of conditioning time and vapor phase composition on system efficiency and peak symmetry, and as well the effect of vapor phase composition on separation selectivity.

Journal of High Resolution Chromatography 6, 82-88 (1983). TLC of desipramine, codeine, cocaine, butacaine, flurazepam, caffeine, nikethamide, benzocaine on silica with methanol. Detection by UV 254 or with acidified iodoplatinate reagent.

J.Liquid Chromatogr. 6, 63-71 (1983) Investigation of the adsorption behaviour of solvents whose molecules differ in polarity functional groups and shape and the effect of the less polar diluent. Determination of the surface excess for various combinations of diluents and polar solvents using the modified thin-layer frontal chromatography technique.

J. High Resol. Chromatogr. 10, 362-364 (1987). Application of the top triangle of the „prisma“ model for mobile phase optimization of polar compounds in normal phase chromatography. TLC and HPTLC of ginsenosides on silica with water - methanol - MEK in various proportions. OPLC of the separated ginsenosides on silica with MEK - methanol - water 70:22:8. Detection by spraying with vanillin - sulfuric acid and densitometry at 550 nm.

J. Planar Chromatogr. 5, 80-86 (1992). Forced-flow planar chromatographic (FFPC) techniques such as over-pressured layer chromatography (OPLC) and rotation planar chromatography (RPC) have been used to study the influence of the forced eluent flow on the dimensions of the spot. The correlation between the eluent flow and the transverse spot dimension on TLC and HPTLC layers has demonstrated that diffusion can be dramatically reduced up to certain eluent flow; at higher eluent flows diffusion remains constant or increases only slightly.