J. Liquid Chromatogr. 13, 2001-2011 (1990). Comparative studies of two methods for predevelopment TLC plate cleaning: ascending development and dip washing using several solvents and solvent combinations. Visualization of residues remaining on the plate surface by densitometry.

Biokémia, 15, 154-155 (1991). Study of the formaldehyde cycle by OPLC using off-line and on-line techniques. Separation of N-, S- and O-methylated compounds of the HCHO cycle. Review with 7 references.

J. Planar Chromatogr. 5, 184-191 (1992). RM values of some basic drugs (used mainly against Parkinson’s disease) and related compounds have been measured by RPTLC with a variety of ion pair reagents in the mobile phase or stationary phases. Retention and separation selectivity were readily controlled by changes in the eluent pH, methanol (modifier) content, or type and concentration of the ion pair reagent. - The strongest effect on the retention of the compounds was obtained when ion pair reagent was incorporated into the stationary phase.

J. Planar Chromatogr. 7, 477-480 (1994). Description of a computer-assisted direct scanning method for simultaneous two-factor (initial concentration, C1, and initial mobile phase volume V1) optimization of the separation of a mixture of seven compounds by stepwise gradient HPTLC.

Proc. 9th Internat. Symp. Instr. Chromatogr., Interlaken, April 9.-11., 261-271 (1997). Description of different TLC techniques like e.g. affinity thin-layer chromatography, anticircular development TLC, centrifugal development TLC, channel TLC, charge transfer TLC, circular or radial TLC, continuous development TLC, dual band TLC, gradient elution TLC, HPTLC, hot plate TLC, ion-pair formation TLC, linear development TLC, multiple development TLC, over-pressurized TLC, partition TLC, plain TLC, preparative TLC, programmed multiple development TLC, reversed-phase ion-pair TLC, reversed-phase partition TLC, rod TLC, step-wise or sequential development TLC, two dimensional development TLC, vapor programmed development TLC.

J. Planar Chromatogr. 14, 355-359 (2001). Increase of velocity and migration distance of the mobile-phase front in porous media by application of an external electric field. TLC on silica gel with benzene - methanol 3:2.

Proc. Intern. Symp. on Planar Separations Plan. Chrom. 129-138 (2003). Conventional HPTLC of aromatic hydrocarbons with polar groups (2-naphthol, 1-nitro-naphthalene, 1,7-dihydroxynaphthalene, 2-ethylanthraquinone, 4-nitroaniline, anthraquinone) and dyes (1-aminoanthraquinone, fat brown, 4-diethylaminoazobenzene, 4-hydroxybenzene-azonaphthol-2, 4-(4-(N,N-ethylethanol)benzeneazo)-N-methylphthalimide, 4-nitroaniline) on RP-18 with e.g. 90% methanol in pH 10 buffer (diluted 1:7 with water) or acetonitrile - buffer in a presaturated horizontal chamber. Planar electrochromatography was performed under similar conditions with the exception of e.g. using plates with 0.5 cm margins of paraffin oil along their longer parallel edges and pre-wetting after spotting of the sample with mobile phase from both sides leaving within approximately 1 mm dry zone of start spot position. Then the chromatographic plate was pressed face-to-face with a counter-plate using clips. 200-250 V /cm field was applied to the plate. Higher efficiency and shorter development time of electrochromatography systems relative to conventional TLC separations were demonstrated.

J. Planar Chromatogr. 17, 290-296 (2004). Description of a new AMD instrument. Its main advantages are very low cost both of construction and in use. In comparison with ascending development in conventional instruments, a laboratory-made horizontal sandwich chamber is used for development. With the help of a series of special accessories no obvious mobile phase remains in the distributor after each step thus saving a large amount of solvent. All the components of the instrument are easy to obtain, so the average worker in the laboratory could construct all the instrument except the control unit. An application of the instrument is described; the results obtained were satisfactory. Compared with the commercial instrument the main differences are 1) a horizontal sandwich chamber with funnel distributor is used as development chamber, 2) the most expensive component, a motor-driven valve, is omitted, 3) a micro air pump (normally used to supply oxygen for goldfish) is used to deliver mobile phase to the chamber. AMD separation of 13 dyes with first acetone - ethyl acetate 1:1 to compress the spots to slim bands, then seven steps with ethyl acetate - chloroform 4:21 to1:9 were completed; then seven steps with chloroform - cyclohexane 17:3 to 67:33. After these fifteen steps of AMD the mixture was separated into eighteen visible spots.