J. Chromatogr. 695, 267-277 (1995). Use of forced flow planar chromatography to characterize the physical and retention properties of an octadecylsiloxane-bonded particle-embedded glass fiber medium used for solid-phase extraction. Discussion of the effect of the carbon loading, intraparticle porosity, being capacity and hydrophobicity index, the interparticle porosity and specific permeability on the characteristics of the medium.

J. Planar Chromatogr. 11, 100-104 (1998). Discussion of binary B - N (and B1 - B2) mobile phases and the impact of the quantitative proportions of each solvent on the magnitude of the Rf coefficient. A relationship is proposed which assumes the linear dependence of the Rf coefficient on mobile phase composition; this linearity reflects complete lack of any stronger intermolecular interactions within B - N (and B1 - B2) binary mobile phases. TLC of 1-naphthol, 2-naphthol, pyrocatechol, resorcinol, and hydroquinone on acetylated cellulose, polyamide, alumina, and silica gel. Detection under UV.

J. Planar Chromatogr. 14, 63-65 (2001). HPTLC of cholic and glycodeoxycholic acid on RP-18 W with methanol - water 7:3. Visualization by spraying with a 1% solution of phosphomolybdic acid in 2-propanol followed by heating at 120 °C for 5-10 min. The experiments were performed at 5, 10, 20, 30, 40, 50, and 60 °C; these temperatures were controlled to an accuracy of +/- 0.2 °C. Because of the heat evolved during solvent adsorption, the temperature of the stationary phase increases near the migrating front of the mobile phase by as much as 3-4°C. The use of a chamber with a thermostatted cover resulted in almost linear Van't Hoff behavior of the substances separated over the whole temperature range whereas highly non-linear Van't Hoff plots were obtained when a chamber equipped only with thermoisolated cover was used. For temperature-retention studies all internal surfaces of the chromatographic chamber must be thermostatted independently to minimize temperature differences inside the chamber. Efficiency and selectivity of a chromatographic process, and the precision and reproducibility of analysis, are temperature-dependent, new devices for temperature-controlled thin layer chromatography are still being constructed.

J. Planar Chromatogr. 18, 323-325 (2005). TLC of salicylic and benzoic acid on silica gel and of phenol, paracetamol, quinoline, 8-hydroxyquinoline, 4-bromoaniline, 2-chloroaniline, salicylic acid and benzoic acid on silica gel modified with DC 200 silicone oil with methanol - buffer in different volume ratios. TLC can be a valuable method for the determination of the pKa values of organic acids and bases. It is a simple and inexpensive alternative to the HPLC procedure.

J. Chromatogr. 520, 402-410 (1990). Study of the reverse phase TLC retention of some organic electrolytes on RP-18 silica. Optimization of the retention and selectivity for some N-phenylamides of benzoylacetic acid by changing the content of the organic modifier methanol. Comparison with ion-pair reverse phase HPLC.

J. Chromatogr. 556, 81-84 (1991). Presentation of a survey of published optimization procedures in TLC. In one-dimensional TLC, selection of mobile phase through either computerized or non-computerized methods such as simplex, overlapping resolution map. Proposal of resolution-based criteria and others such as principal component analysis, etc. In two-dimensional TLC, the aim is to find two systems exhibiting the least correlation.

Anal. Letters 27, 1031-1054 (1994). The method is reported to be capable of finding the best system and the optimal combination of two or more TLC systems according to the partition coefficients.

J. Planar Chromatogr. 10, 358-361 (1997). TLC of seven PAHs (7-, 8-hydroxy-, trans-7,8-, trans-9,10-dihydroxybenzo(a)pyrene, benzo(a)pyrene, 1,2,5,6-dibenzanthracene, chrysene) on cellulose acetate with various solvent systems and application of principal-components analysis (PCA) to the experimental results in order to find the optimum solvent system for the separation of the hydrocarbons of interest.