J. Planar Chromatogr. 13, 290-295 (2000). Investigation of the hydrolytic cleavage of the 3-cyanopropyl and diol ligands from the silica gel matrix surface. Hydrolytic cleavage was induced by use of mobile phases comprising mixtures of methanol, water, and buffers of different pH. CN- and diol-type polar ligands are less susceptible to hydrolytic cleavage than apolar (C 8 and C 18) ligands. The difference can probably be explained by use of an ion-exclusion mechanism.

J. Planar Chromatogr. 17, 323-327 (2004). TLC of three 1,2-dithioles and five 2-alkylidene-4-oxothiazolidines on RP-18 with binary mixtures of methanol and water, tetrahydrofuran and water, and acetone and water in different proportions. Detection with iodine vapor. Good correlation of chromatographically obtained lipophilicity data with calculated log P values.

J. Chromatogr. Sci. 53 (3), 436-442 (2015). Review on the most important aspects of forced-flow TLC, including the set-ups developed and the progress of detection methods used. Description of mobile phase progress in planar stationary phase, evoked by either internal forces, capillarity, or external forces, e.g., gravity, electric field, a pump and centrifugal forces. Emphasizing on overpressured layer chromatography and forced-flow planar chromatography, as a special bridge between HPLC and TLC. Characterization of a simple and special rule of the progress of mobile phase: optimal efficiency is composed by the doubled effect of flow resulting from the pump-forced mobile phase (convex profile of laminar flow) and capillary forces on the dry stationary phase (concave laminar flow).

J. Planar Chromatogr. 4, 169-171 (1991). TLC separation of 1-(2-pyrimidy)-3-methylpyrazolon and 6 cleavage products on silanized silica with ethyl acetate - ether - methanol - 35% NH3. Detection by exposure to iodine vapor.

J. Chromatogr. 658, 483-487 (1994). Progress made in the attempt to reduce and eventually eliminate chlorinated solvents in preparative liquid chromatography; TLC serving as pilot technique.

J. Planar Chromatogr. 10, 353-357 (1997). The concepts of eluent strength and eluotropic series relate to adsorbent activity as a singular property of a given stationary phase, indirectly implying that independent of the adsorbent applied the retention mechanism is governed by one type of active site only. This assumption can hardly be applied for elucidation of experimental results obtained from systems employing adsorbents with more than one type of active site like e.g. alumina. It was demonstrated that for these more complicated stationary phases a single-value eluotropic series of solvents is to some extent misleading.

J. Planar Chromatogr. 18, 112-117 (2005). Description of a method for optimization of a TLC separation based on use of a genetic algorithm. The procedure was tested by optimization of the reversed-phase HPTLC separation of a mixture of six pesticides; satisfactory results were obtained. The genetic algorithm was compared with the simplex method.

I. General principles and practical approaches. J. Planar Chromatogr. 6, 187-197 (1993). Validation of a TLC method in comparison with HPLC. Various steps necessary for the validation are: selection of the analytical performance parameters, model solutions, and stability problems. Practical guidance is also given to the performance of validation experiments. The importance is also given on the performance of validation experiments. The importance of different system suitability tests is emphasized.