Anal. Chim. Acta 255, 297-303 (1991). Description of a fiber-optic-based fluorescence instrument for in-situ quantitative scanning in TLC. TLC of phenothiazines on silica with chloroform - methanol 9:1. Enhancing the fluorescence signal by immersion in a mixture of Triton X-100 - chloroform 1:4. Detection limit 5.3 µM for acepromazine and 6.4 µM for propiomazine.

Anal. Chem. 67, 3293-3299 (1995). TLC on silica with i-butanol - quality control, - acetic acid - water 7:7:2:4 in a sandwich type chamber. Detection by dipping into a solution of 0.05 % o-phthalaldehyde in methanol, containing 0.2 % 2-mercaptoethanol and 0.09 % Brij-35, and under UV 366 nm. Monitoring the kinetic profile of the reaction with a charge-coupled device camera by taking sequential images of the separation medium after the reaction start. Analysis of the resulting third-order data using a direct trilinear decomposition (TLD). Discussion of the kinetic approach and the applicability and limitation of the TLC method.

Sz. Nyiredy, A. Kakuk (eds.): Planar Chromatography 2000, Lillafüred, Hungary, 24-26 June 2000, Res. Inst. for Med. Plants, p. 89-95. : A quick, low-priced evaluation system, consisting of a flat bed scanner and a suitable software, is demonstrated. As example lactose in animal feed is determined on silica gel.

J. Liq. Chrom. & Rel. Technol. 25, 1497-1513 (2002). Description of two new scanning approaches developed on the current needs for analysts who employ TLC as a tool in research, as well as in routine analysis. One approach is aimed to support analysts in economically disadvantaged areas, where cost intensive apparatus is unsuitable but trace analysis by simple means is required. The other system allows the spectral determination of chromatographic spots on TLC plates covering the ultraviolet and the visible range, thus, revealing highly desired information for the analyst. HPTLC of i. a. diphenhydramin and lidocaine on silica gel with ethyl acetate - methanol - 25% NH3 17:2:1.

Planta med. 1985, 250-252. TLC of furocoumarins on silica with hexane - chloroform - THF 150:25:25. Detection by UV 254 and 366 mm. Preparative isolation using centrifugal TLC on silica (layer thickness 2 mm) with hexane - chloroform - THF 92:4:4. Up to 15 mg of pure coumarin could be obtained in one run.

J. Planar Chromatogr. 8, 397-400 (1995). Summary of optimum conditions to be used for photodocumentation of high-performance thin-layer chromatograms, in regard to the increasing importance of legal and auditing requirements for laboratories, e.g. GLP and GMP. Presentation of examples of color and monochrome photography of chromatograms containing colored, fluorescent, and fluorescence-quenched zones.

J. Planar Chromatogr. 18, 408-414 (2005). With RSD up to 10 % by far the largest source of uncertainty, secondary chromatography is the main reason for poor precision in TLC. During the drying process mobile phase evaporates from the upper surface of the plate, and molecules of separated components inside the layer move up or down. The experimenral results show the strong dependence of the intensity of the reflected light on the position of the spots inside the layer, giving an idea how to construct a device for drying and derivatization of TLC plates. Results obtained by the new TLC dryer significant improved reproducibility and precision.

Chromatographia 17, 79-82 (1983). Investigation of Cd2+, Cu2+, Fe3+, Mn2+, Ni2+, Pb2+ and Zn2+ on bonded stationary phases. Consideration of the effect of structure, surface loading, type of silica and mobile phase.