J. Chromatogr. 287, 259-270 (1984). The RM values of a series of dermorphin-related oligopeptides were determined in two reversed-phase TLC systems, the mobile phase being an aq. buffer alone or mixed with various amounts of methanol or acetone. The linear relationship between the chromatographic behaviour and the composition of the mobile phase yielded very similar extrapolated RM values at 0 % of organic solvent in both systems.

I. Experimental data on chelates. J. Planar Chromatogr. 2, 310-314 (1989). Ion exchange of chelate metal or dissociation of the chelate as explanation for the observation the Rf values for low-stability metal chelates decrease with decreasing chelate concentration in a thin silica gel layer.

Chromatographia 45, 81-90 (1997). Study of the absolute concentrations and the concentration distribution of different cationic ion-pairing reagents after chromatographic development on physically and chemically bonded reversed-phase layers with a mixture of methanol in water (50-70%) containing an ion-pairing reagent. Investigation of the chromatographic behavior of acid, neutral and basic model compounds. Determination of different reagents remaining on the layer after the development by spectrophotometry, potentiometry and CE. Comparison of the results with those obtained on silica layers. Discussion of the retention mechanism. The ion-pairing reagents used: tetramethylammonium bromide, tetrabutylammonium bromide, trioctylmethylammonium chloride.

Anal. Chem. 74, 2653-2662 (2002). This review covers the literature of TLC/HPTLC found in Chemical Abstracts and ICI Web of Science from November 1, 1999 to November 1, 2001. Review Contents: 1. History, Student Experiments, Books, and Reviews; 2. Theory and Fundamental Studies; 3. Chromatographic Systems (Stationary and Mobile Phases); 4. Apparatus and Techniques; 5. Detection and Identification of Separated Zones; 6. Quantitative Analysis; 7. Preparative-Layer Chromatography and Thin-Layer Radiochromatography 8. Literature Cited.

Proposal of eight parameters as the criteria for the examination of plate quality.

Anal. Chem. 59, 62-64 (1987). Discussion of the utilization of a new multipeak separation response function in evaluation and optimization of TLC quality. Function is based on a previously chosen Rf interval and on the differences between the Rf-values of the compounds. This makes comparison between solvent systems possible. Demonstration by the separation of Pt(II) complexes

III. Thin- layer chromatographic separation of noble metals on stannic pyrophosphate.) (Chinese). J. Wuhan Univ. 1, 64-70 (1987) (Wuhan Daxue Xuebao, Ziran Kexueban). TLC of binary and ternary mixtures of noble metals, Ru, Au, Pd, Pt, Rh, Os, Ir, Ag, on silica-tin pyrophosphate with many acidic, basic and neutral solvent systems. Study of the relationship between Rf values and the concentration of trimethylamine in developing solvents, and the effect of ethanol content on TLC behaviors of the metals.

J. Liquid Chromatogr. 12, 937-947 (1989). Reverse-phase TLC of metal ions on silica with aqueous solutions of acetic acid, monochloroacetic acid, dichloroacetic acid, and trichloroacetic acid of 0.01, 0.05, 0,1, 0,15 and 0.2 M. Study of the effect of chloro-substituent groups on Rf values of cations, and the effect of concentration and pH of the mobile phase with many qualitative ternary separations.