Chinese J. Chromatogr. (Sepu) 15, 331-333 (1997). Use of orthogonal array method to optimize the mobile phase. TLC on silica with acetone - cyclohexane - tetraethyl ammonium halide 59:824:118. Discussion of the factors affecting the final results.

J. Planar Chromatogr. 14, 409-414 (2001). Planar electrochromatography (PEC) is a mode of planar chromatography in which the mobile phase is driven by electroosmotic flow. The variables that affect the performance of PEC with an aqueous mobile phase on a bonded octadecylsilyl layer (e.g. magnitude of the applied electrical field, the concentration of the buffer salt, the pH of the mobile phase, and the concentration of acetonitrile used as the organic modifier) are discussed. TLC of four compounds of diverse structure, e.g xylene cyanol, 17a-acetoxyprogesterone, benzanilide, 4-pregnen-11b,17a,21-triol-3,30-dione, and benzamide on pre-wetted RP-18 with e.g. acetonitrile and sodium acetate solution with different concentrations as mobile phase. Densitometry at 254 nm.

Proc. Intern. Symp. on Planar Separations Plan. Chrom. 163-178 (2003). Application of a new concept, the process of flowing eluent wall (FEW), for single and multi-channel on-line overpressured layer chromatography (OPLC) separation with non-segmented sorbent bed for operating segmentation. OPLC of dyes, chamomile oil, ascorbigen, and homogenized cabbage on silica gel with different mixtures of hexane - ethyl acetate, chloroform - methanol - acetic acid 90:10:1. Derivatization with freshly prepared vanillin-sulfuric acid reagent or 10% molybdatophosphoric acid in n-propanol (120°C for 5 min). Detection under UV 254 and 285 nm.

J. Liq. Chromatogr. Relat. Technol. 29, 2045-2057 (2006). TLC of substituted trans-piperidinones comprising 15 amidolactames and 7 aminolactames on silica gel with 13 mobile phase systems with LSChrom software. The procedure takes into account the adsorption properties of the mobile phase (parameter epsilon), stationary phase, and sample structure expressed by the relevant group.

J. Planar Chromatogr. 21, 373-378 (2008). TLC of a lipophilic test dye mixture (indophenol blue, Sudan red G, 4-dimethylaminoazobenzene) on aluminum oxide in a vertical planar dielectrochromatography chamber with toluene and benzene. Evaluation by densitometric absorbance measurement at 506 nm. In classical TLC the mobile phase is drawn by capillary forces therefore its flow velocity is inversely related to the distance migrated by the solvent front. For this reason classical TLC may be time-consuming. To improve the separation selectivity suitable transverse alternating electric fields were used in planar electrochromatography to modify the mobile phase front velocity and the migration distance of solutes. Resolution was improved in the countercurrent arrangement of the instrument.

Anal. Chim. Acta 716, 54-60 (2012). Demonstration of the separation and detection capability of micro-TLC technique involving simple one step liquid extraction protocols of complex materials without multi-step sample pre-purification. Isolation of the target components (cyanobacteria pigments, lipids and fullerenes) from complex matrices including spirulina dried cells, birds’ feathers, fatty oils, and soot samples derived from biomass fuel and fossils-fired home heating systems. Completion of an isocratic separation protocol involving less than 1 mL of one component or binary mixture mobile phases within times of 5–8 min in each case, e.g. 1) micro-TLC of dyes and low-molecular mass compounds of cyanobacteria cells (S. platensis) extracted from pharmaceutical formulations on RP-18W phase with acetone – n-hexane 3:7 detection under daylight and densitometric evaluation; 2) separation of the main lipids fraction derived from bird feathers and oil samples (rapeseed, grapeseed, sunflower and olive oil) on RP-18 phase with dichloromethane – methanol 3:17, detection by spraying with 10 % phosphomolybdic acid in methanol and heating at 80 °C for 20 min; 3) screening of soot residues in dust samples derived from biomass fuel and fossils home heating systems for the presence of C60/C70 fullerenes on RP-18W phase with n-hexane, detection by densitometry at visible light, or at UV 254 nm or UV 366 nm.

J. Planar Chromatogr. 30, 97-105 (2017). Review of current applications of room temperature ionic liquids on planar chromatography as mobile phases. Methylammonium, ethylammonium, propylammonium, isopropylammonium, butylammonium, s-butylammonium, dipropylammonium, tributylammonium were reported to be used as replacements for organic solvents in binary systems. As mobile phase additives, room temperature ionic liquids were used for the separation of peptides and basic drugs in both normal phase and reversed phase chromatography with an emphasis on their role as masking agents. The authors suggested that given the large number of possible cation and anion combinations, systematic methods that characterize solvation properties for both ionic liquids and organic solvents are required.

Chromatographia 18, 628-632 (1984). Investigation of the effect of the vapor phase and other influences on TLC. Comparison of the relationship of time vs. developing distance and flow rate. Dyes used as model substances.