Proc. Intern. Symp. on Planar Separations Plan. Chrom. 13-23 (2003). TLC of newly synthesized benzanilides, benzamide and a group of pesticides on RP-18 with aqueous solutions of acetonitrile or methanol with different organic modifier concentrations. Visualization under UV 254 or 366 nm.

J. Planar Chromatogr. 20, 27-37 (2007). The retention factor Rf is used in several criteria generally known as chromatographic response functions. In TLC and HPTLC most of these are based on differences between the retention factors of two substances, which are summed or multiplied. There are also other functions, e. g. the multispot response function which has a clearly defined range (0 to 1), but its distribution is unstable. Here two new independent coefficients: Ru (retention uniformity) and Rd (retention distance) are proposed; these always have values between the range 0 to 1 and stable density, irrespective of the number of compounds separated. An example is given of their use in the separation of fibrate-type antihyperlipidemic drugs by normal and RP-TLC (114 systems).

J. Planar Chromatogr. 30, 401-404 (2017). HPTLC of 35 model compounds on RP-8 with 61 chromatographic systems to determine the solvent strength of 20 solvents on_x000D_ RP-8 phase and to compare the values with a previous study on silica gel. The study showed that the RP-8 phase can behave as normal-phase adsorbent.

J. Planar Chromatogr. 2, 49-52 (1989). Luminiscence polarization of chromatographic spots of 23 DNS amino acids using a two channel scanning laser fluorometric detector. TLC of DNS amino acids on polyamide with 1.5% formic acid in water.

J. Planar Chromatogr. 3, 68-72 (1990). Development of an absolute method for the determination of molecular weight distribution (MWD) of oligomers, based on i.a. 1.) the preparation of chromatograms with continuous distribution of oligomer homologues (OH) into individual peaks in the initial part of the chromatogram, 2.) the micropreparative isolation of the first two low molecular weight OH, and the determination of their structure by high resolution NMR. The MWD of oligostyrenes was calculated from the chromatograms obtained with adsorption HPTLC.

J. Planar Chromatogr. 7, 251-253 (1994). Employment of the Kowalska model of solute retention in liquid - solid chromatography with alcohol - aliphatic hydrocarbon mixtures as binary eluents, for the investigation of the retention of azines, diazines, their dehydrocondensation products, and their methyl and sulfur derivatives. TLC on silica with propanol - hexane in various proportions.

Part II: Characteristics of the second, equilibrium stage of chromatographic separation. J. Planar Chromatogr. 10, 163-166 (1997). Study of the factors which influence the progress of a chromatographic separation provide data which enable better understanding of the process. The properties of a liquid-crystal detector have been used to display changes in the distribution of spot concentration in the second stage of the chromatographic process (in the mobile phase range Zf > 20 mm). Estimates were made of the influence on spot broadening of the type of chromatographic system, the concentration distribution at the origin, RF values, and the duration of the chromatographic process. HPTLC of diphenylamine on silica/kieselguhr with different solvents or their mixtures. The detector was made from the nematic liquid crystal hexylcyclohexylisothio-cyanphenyl.

J. Planar Chromatogr. 12, 421-424 (1999). Study of the interaction of fourteen hydrazines with Trp, Ser, Leu, Val, Gly, Phe and BSA by charge-transfer reversed-phase TLC. TLC of hydrazines on silica gel impregnated with paraffin oil 19:1 solution in n-hexane by overnight pre-development. The mobile phase was acetone- water 3:2. For the determination of the lipophilicity the mobile phase contained the chosen amino acid in different concentrations. Detection through the strong intrinsic color of the compounds.