J. Liq. Chrom. & Rel. Technol. 24, 1381-1396 (2001). Investigation of intermolecular hydrogen-bonding interactions among adsorbed analyte molecules (i.e. so-called lateral interactions) and their real impact on the retention process. To this effect, two different models were elaborated, taking into account the aforementioned interactions. The validity of the two models was checked experimentally with three higher fatty acids as test solutes. The results obtained fully confirmed the practical usefulness of the two approaches. TLC of dodecanoic, tetradecanoic, and hexadecanoic acid on cellulose with decalin. Visualization by spraying with ethanolic bromocresol green solution. Quantification by densitometry at 625 nm.

J. Planar Chromatogr. 18, 450-454 (2005). TLC of twenty-seven 2-benzylsulfanybenzothiazole derivatives on silanized silica gel in a pre-equilibrated normal chamber with 0.05 M phosphate buffer (pH 7.4 or 3.0) and methanol as organic modifier. Detection under UV light at 254 nm.

J. Planar Chromatogr. 3, 317-321 (1990). A computer program has been developed which can be used to select optimal solvent systems (i.e. diluent, modifier and concentration of the latter) for the chromatographic analysis of a given set of compounds.

J. Chromatogr. 587, 359-363 (1991). Description of a computer assisted method for simultaneous two-factor optimization for the separation of ten rare earths by HPTLC, based on a polynomial estimation from seven preliminary experiments according to a hexagon design, using the Rf difference as the selection criterion.

J. Planar Chromatogr. 8, 112-116 (1995). Evaluation rates of diffusion and evaporation for commonly used ternary TLC solvents (containing ethyl acetate, chloroform, and tetrahydrofuran; solvent strength (ST) 2.0, using hexane as ST-regulator) prepared according to the „PRISMA“ model.

Acta Chromatographica 8, 13-31 (1998). Description of a systematic approach for the optimization of multicomponent mobile phases in TLC, with emphasis on changes in selectivity as a result of variation of the mobile phase strength 'regulator' and the type of stationary phase. The optimization triangle method was used to choose the optimum quaternary mobile phases.

J. Planar Chromatogr. 23, 173-179 (2010). Many manuscripts and already published articles on analytical procedures to be used in pharmaceutical quality control are characterized by several typical methodological failures and misconceptions. The autors present a collection of typical failures, misconceptions, and misleading data from articles published over the last two years in seven well-known chromatographic publications and provide at the same time a list of references describing optimum approaches to validation of specific TLC/HPTLC procedures. In particular, method specificity, linearity, accuracy, and precision very often are not determined properly and in accordance with best practise.

Planar Chromatogr. 8, 269 - 278 (1995). HPTLC of theophylline and structural related substances (i.e. theophyllidine, methylxanthine, theobromine, etophylline, caffeine) on silica with toluene - 2-propanol - acetic acid 16:2:1. Quantification by densitometry at 274 nm.