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.

J. Planar Chromatogr. 6, 105-111 (1993). The separation quality in planar chromatography can be defined by a suitable separation metric such as the PRF. In a series of mobile phases consisting of a given strong solvent - at an appropriate strength - and each of a series of weak solvents, it is found that the PRF varies in a ragular manner with certain solvent properties. The properties of the weak solvent considered here are the strength as defined by parameters such as e°, P', p*, or ET(30), of physical properties such as molar volume, density, or surface area. The separations were computer simulations on silica with steroids as solutes.

J. AOAC Int. 82, 38-47 (1999). Description of a 2-day program with 9 exercises in TLC in order to teach the basics of the technique including the preparation of written reports. The exercise consisted i.a. of the study of the influence of several factors on chromatographic behavior (e.g. sorbent type, layer thickness, particle size and distribution, chamber saturation, 2-dimensional TLC, HPTLC); visualization techniques, and discussion of the results. Substances chromatographed, e.g. benzodiazepines, sulfonamides.

- Part 1. Fundamentals of systematic quantitative errors. J. Planar Chromatogr. 18, 51-56 (2005). First part of a series covering systematic errors arising in separation systems, evaluation and calibration errors, nonlinear separation and quantitation techniques, the sf4-procedure for finding total systematic errors, systematic errors caused by regulations, and conclusions and proposals for quantitative planar liquid chromatography (PLC). 1) Nonsystematic errors: 1.1 Finding systematic errors hidden in nonsystematic errors, 1.2 Are random errors unstable? 1.3 Errors caused by (false) statements. 2) The main sources of systematic errors in quantitative PLC: 2.1 Chromatography, 2.2 Physics (baseline - baseplane; practical example). 2.3 Mathematics (detectability limit of the systematic error and the standard certainty STC). 3) Sampling chromatography.

Abstract No. 9923, IHCB (2009). HPTLC of several herbal formulations (tablets extracted with methanol) on silica gel with toluene - ethyl acetate 19:1. The fingerprint method was suitable for correct identification and for routine quality control of the herbal extracts.

Detection by spraying with 0.01 % dithizone in trichloromethane.