J. Planar Chromatogr. 3, 251-255 (1990). New layer for problematic separation: TLC of 10 organic acid herbicides on silica - calcium sulfate layers 1:4 with different solvent systems. Identification by spraying with alkaline ethanolic solution of bromophenol blue.

Two-stage development. J. Chromatogr. 623, 139-147 (1992). Discussion of a theoretical model of the simplest version of gradient multiple development, the techniques of two-step development. Presentation of a computer program for the calculation of final Rf values for two-step development in the gradient mode for known retention vs. eluent composition relationship. Comparison of predicted and experimental Rf values.

General effects of aqueous solutions of a-cyclodextrin as eluent. J. Chromatogr. 695, 155-159 (1995). Examination of adsorption TLC on cellulose for compounds that form complexes with cyclodextrins using aqueous solutions of a-cyclodextrin as eluent. Discussion of the effects of a-cyclodextrin on the TLC behavior of methyl orange, similar diazo dyes and nitrophenols. The effect could provide a diagnostic method for detecting cyclodextrin inclusion compounds that adsorb on cellulose.

J. Chromatogr. A 758, 125-134 (1997). Presentation of new variants of TLC plates with a sorbent layer closed by a film transparent to UV light. Investigation of characteristics of the plates. Discussion of the mobility of the solvent, and of the way to adjust the velocity of the mobile phases.

J. Planar Chromatogr. 13, 307-313 (2000). Planar electrochromatography on nonwetted silica gel and aluminium oxide layers. The electric field influences the migration velocity of the mobile phase, the migration of the chromatographed substances, and the shape of the chromatographic peaks. The effect has been shown for a nonpolar binary mobile phase and nonpolar chromatographed substances (PAH) and for a polar mobile phase and polar chromatographed substances (phenol and quinoline derivatives).

J. Planar Chromatogr. 16, 338-346 (2003). In normal TLC migration of the mobile phase through the layer is controlled by capillary forces. The velocity and migration distance of the mobile-phase front in porous media can be increased by application of an external electric field. This effect is observed i.a. on different TLC plates developed with non-polar and polar solvents. As a result the separation of some compounds was improved. This method is a hybrid of electric forced flow and classical TLC; it was named 'planar dielectrochromatography' (PDEC). TLC of lipophilic dyes on aluminium oxide and silica gel with benzene. Also TLC of a hydrophilic test dye mixture on cellulose with propanol - water - ethyl acetate 6:3:1.

J. Planar Chromatogr. 17, 404-410 (2004). Highly reproducible retention was achieved when the adsorbent layer of the plate was pre-wetted and equilibrated with the mobile phase after adaptation of a horizonal DS chamber for electrochromatography in a closed (pressurized) system. The disadvantages of the open system, evaporation of the mobile phase from the plate and excessive flow of mobile phase to the surface of the adsorbent layer during development, were eliminated. Separation of a test dye mixture on pre-wetted RP-8 and RP-18 phases with acetonitrile - buffer and application of a potential of 2 kV to create the electric field. Detection by scanning in reflectance mode at 420 or 254 nm.

J. Chromatogr. A 1046 (2), 251-257 (2007). Fluorescence scanning densitometry of various analytes on HPTLC silica gel plates impregnated with a solution of coralyne cation, based on the increase or decrease, that the corresponding analyte induces on native coralyne emission at a given excitation wavelength. Compared to a procedure previously described for berberine cation, and Reichardt's dye probes, the sensitivity of coralyne in HPTLC detection of non-fluorescent, structurally different analytes (e.g. long-chain alkanes, alcohols, alkylbromides, neutral lipids) is superior.