Anal. Chim. Acta 688 (2), 168-174 (2011). Demonstration of the separation and detection capability of micro-TLC technique involving simple one step liquid extraction of complex materials without need for multi-step sample preparation. Isolation of the target components (cyanobacteria pigments, lipids and fullerenes) from complex matrices including spirulina dried cells, birds’ feathers and fatty oils as well as soot samples derived from biomass fuel and fossils-fired home heating systems. The isocratic separation protocol required less than 1 mL of one component or binary mobile phases. Development was achieved within 5-8 min. Detection by exposure to iodine vapors or by spraying with phosphomolybdic acid reagent.

(Non-linear calibration in quantitative HPTLC). GIT Supplement 3 /83 17-24. For quantitative HPTLC, a practicable calibration method is needed. The non-linear parameter procedure proposed by Kufner and Schlegel allows an optimal calibration even in the upper microgram range using a single parameter "Km". Examples were taken from drug analysis in biological fluids and from various published data. Correspondences between calibration and standards were in the range of 1-3 % of the values measured.

Anal. Chem. 318, 228-233 (1984). Dünnschicht-Chromatographie mit Gradienten Elution im Vergleich zu Säulenflüssigkeits-Chromatographie. (TLC-PMD, thin-layer chromatography with gradient-elution in comparison to HPLC). TLC of carboxylic acids, benzanilide, thiourea on silica by PMD technique with a) dichloromethane, b) hexane, or their mixture, and gradient elution with elution started with methanol, ended with dichloromethane-hexane 1:1. Detection by UV with different spray reagents. Densitometry and fluorometry at different wavelengths. A comparison with HPLC was made.

J. Planar Chromatogr. 6, 7-12 (1993). Discussion of features of critical importance to the performance of densitometric instrumentation in the analysis of thin media separations.

J. Chromatogr. A 1530, 204-210 (2017). Presentation of a concept of using TLC to multicomponent sample preparation for quantitative determination of solutes followed by instrumental technique. Separation of chosen substances and their internal standard from other components (matrix) by TLC using multiple chromatogram development or two-dimensional multiple development to form a single zone containing them at the solvent front position. Extraction of the analytes and internal standard in the solvent front zone and quantitation by using other instrumental techniques, e.g. HPLC.

J. Chromatogr. 668, 427-433 (1994). Description of a sample preparation technique rendering alkaloid fractions suitable for TLC or GC determination of toxic pyrrolizidine alkaloids from various plant sources. The procedure includes the reduction of the alkaloid N-oxides with the oxygen-absorbing resin and a clean-up with strong cation exchange solid phase columns, as well as an enrichment of the alkaloids if desired.

J. of Chromatogr. A 1251, 240-243 (2012). Report of the use of silver-thiolate chromatographic material as a stable material for TLC. The stationary phase operated under the same principles as silver-ion chromatography, separating compounds by degree of unsaturation; however, showed considerable advantages over Ag-TLC in terms of light stability and shelf lifetime. Demonstration of the light stability and its application for separations based on the degrees of unsaturation. TLC of using fatty acid methyl esters (FAMEs) with hexane – ethyl acetate 9:1 and of polycyclic aromatic hydrocarbons (PAHs) with 100 % ethyl acetate.

J. Planar Chromatogr. 29, 446-452 (2016). HPTLC of brilliant blue (1), tartrazine (2) and carmoisine (3) on polyaniline-modified silica gel (prepared by in-situ oxidative polymerization of aniline in the presence of different amounts of silica gel using potassium persulfate as the oxidizing agent) with methanol - water 1:9. The hRF values for (1) to (3) were 5, 96 and 90, respectively. A better separation efficiency was observed by modifying silica gel with polyaniline as compared to the conventional silica gel layer._x000D_