Chromatographia 20, 739-742 (1986). Discussion of the effects of stabilizers such as 2, 6-di-tert-butyl-4-methyl-phenol and hydroquinone and impurities in solvents on the reproducibility of the quantitative analysis (stability tests) of mebeverine by HPTLC.

J. Chromatogr. 402, 358-360 (1987). TLC of phenolic acids on Fe(III)-impregnated silica with distilled, tap and sea water. Detection by spraying with bromocresol green indicator reagent and a 1% aqueous solution of Fe(III) nitrate, and by inspection under UV. Discussion of the mobility of Fe(III)-phenolic acid complexes.

J. Chromatogr. 439, 317-339 (1988). TLC on silica with a) cyclohexane - toluene - diethylamine 75:15:10, b) chloroform - methanol 9:1, c) chloroform - acetone 8:2 for benzodiazepines and a) toluene, b) toluene - isopropanol - NH3 85:15:1, c) chloroform - methanol 9:1, d) chloroform - acetone 8:2 for benzophenones. Detection under UV and by spraying with iodoplatinate solution for the former and with Bratton- Marshall test for the latter.

J. Liquid Chromatogr. 12, 979-985 (1989). TLC of some carboxy and hydroxy benzene derivatives related to lignin and humic materials on silica and Fe(III)- impregnated silica with 1) ethyl acetate, 2) ethyl acetate – benzene 9:11 and 3) ethyl acetate – benzene 5:15. Identification of the compounds tested by the mobility differences on impregnated and plain plates.

1. Effect of temperature on Rf values.) (Japanese). Kagaku to Kyoiku (Jap. J. Educ.) 42, 206-210 (1994). Examination of the effects of temperature on Rf values in TLC, with some dyes and simple organic compounds, e.g. nitrobenzene, phenol, etc., and steroids as analytes.

CBS 81, 10-12 (1998). A number of applications of HPTLC in the bulk drug industry are presented: process optimization, fermentation process monitoring, impurity profile, vessel residue certification and bulk drug analysis. The technique is advantageous when a large number of similar samples is to be analyzed and time and cost considerations are of importance.

Acta Chrom. 6, 21-38 (1996). The possibility of using a thermodynamic approach for optimization of mixed mobile phases for systems with binary and ternary solvents is discussed, as well as the method for predicting separation results in column liquid chromatography on the basis of experimental thin-layer chromatographic data. The effect of mobile phase composition on solute retention is described by solute capacity factors (characteristic of the pure solvents), molecular interactions occurring in the bulk phase and adsorption equilibrium in a given adsorbent – binary solution system. Two kinds of chambers were used in the investigation: a saturated Stahl chamber and a sandwich chamber. The study described the use of different TLC techniques as pilot methods for HPLC.

Chromatography the State of Art, Vol. II, Akademiai Kiado, Budapest 1985, 751-757 RM values of 36 quaternary ammonium steroids were determined by reversed-phase thin-layer chromatography. The RM values of these compounds, deviating from the general role, do not change linearly with the organic solvent ratio of the eluent. TLC on silica impregnated with 5 % paraffin oil in hexane with dioxane - water 7:3, 8:2, 9:1. Detection with iodine vapor.