J. Planar Chromatogr. 4, 127-133 (1991). Comparison of the adsorption properties of Florisil and silica by TLC of aromatic acids and aldehydes in three solvent systems under equilibrated conditions. Discussion of specific differences in adsorption, the influence of polar modifier on the retention, and structural and steric effects of the compounds investigated. These differences enable the choice of the best system for the separation or micropreparative isolation of isomers from natural mixtures.

J. Planar Chromatogr. 6, 252-255 (1993). Comparison of the chromatographic performance of TLC plates coated with 3 µm spherical and 5 µm angular particles using a newly designed apparatus suitable for high pressure (>100 bar) OPLC. The best HETP values obtained were 17.3 and 34.2 µm particles, respectively. These high values were probably caused by the large particle size distribution. The problem of the comparatively low mechanical stability of the 3 µm layers (on glass plates) was solved by using a stainless steel membrane.

J. Planar Chromatogr. 8, 346 - 348 (1995). Survey of the advantages of the new aluminium-backed, amino-modified silica gel layers. Special emphasis is laid on the possibility of thermochemical, reagent-free conversion of different functional groups to fluorescent derivatives after thin-layer chromatographic separation. - TLC of carbohydrates, steroids, and aromatic carboxylic acids on NH2-modified silica. Thermochemical activation was performed with a TLC plate heater. Detection and determination of detection limits under UV 366 nm or by densitometry at 366 nm.

Biomed. Chromatogr. 11, 280-285 (1997). Discussion of impregnation of methods of impregnation of thin-layer materials with a variety of reagents and the role of impregnating reagents in resolving compounds on the layers with special reference to main/basic approaches of impregnation as applied to direct enantiomeric resolution. Discussion of advantages of TLC over other chromatographic methods in efficiency and quantitation. TLC may serve as method for daily routine process in various laboratories to determine enantiomeric purity with a great ease and speed, and serve as pilot methods for large scale separation of therapeutics etc.

J. Planar Chromatogr. 14, 378-383 (2001). Report of experimental results relating to the thermal instability of selected alkyl chemically bonded stationary phases as a result of their irradiation with a high-power neodymium laser, the light source of a Raman spectrometer used for the investigation. The results reported furnish a convincing confirmation of earlier intuitions, described as "vague speculations about the possible aromatization of these ligands".

J. Planar Chromatogr. 18, 160-163 (2005). TLC of rare earths (La(III), Ce(III), Pr(III), Sm(III), Gd(III), Er(III)) on silica gel and silica gel impregnated with 2.5 M ammonium nitrate with different mixed mobile phases containing di(2-ethylhexyl)dithiophosphoric acid as a complexing agent. The best results were obtained by use of ethyl methyl ketone - tetrahydrofuran - 1 M di(2-ethylhexyl)dithiophosphoric acid 17:8:1. Double development was used to obtain better separation of consecutive rare earths.

J. Planar Chromatogr. 1, 182- 187 (1988). Discussion of sample application in planar chromatography involving fundamentals, negative aspects, systematic errors, accuracy, precision, working range, coupling to other techniques and the practical solution.

Proc. Intern. Symp. on Planar Separations Plan. Chrom. 211-221 (2003). Description of the applications of continuous development HPTLC techniques combining on-line and off-line chromatographic principle steps (sample application, separation and detection). Fully on-line combination of off-line sample application and on-line detection as well as fully off-line methods are compared by separating Test Dye Mixture III and furocoumarin isomers. HPTLC of Test Dye Mixture III on silica gel with toluene and different compositions of toluene and chloroform mixtures 9:1, 15:3, 4:1 and HPTLC of furocoumarin isomers on silica gel with ether - dichloromethane - tetrahydrofuran - hexane 10.71:9.68:7.5:72.11, diluted with 50%, 75%, and 100% hexane. All experiments were performed in a further developed prototype apparatus. Detection by densitometry in a range of 200 -1000 nm.