Anal. Chem. 66, 1937-1940 (1994). Description of a new TLC technique termed microchannel TLC. Channels with the dimension 400 µm x 200 µm x 5 cm have been packed with a zirconia stationary phase and used for TLC. Subsequent infrared microspectroscopic detection of organic dyes separated in these channels provided excellent diffuse reflectance spectra and an improvement in the minimum identifiable quantity by a factor of about 500 times over previous TLC work using microscopic slides. This technique requires smaller amounts of sample and stationary phase compared to conventional TLC techniques. A practical application of the separation and identification of four polyaromatic hydrocarbons, two of which are isomers, is also shown.

Chromatographia 45, 347-350 (1997). Use of the thin-layers of lanthanum silicate to study the chromatographic behavior of 28 metal ions in aqueous and mixed systems. Discussion of fast ternary and binary separations and various others.

J. Planar Chromatogr. 13, 182-186 (2000). TLC of fluorescein and erythrosin on modified silica gel and RP 3 with micellar mobile phases comprising cetylpyridinium chloride and sodium dodecylsulfate. Dynamic modification was conducted directly during the process of elution of the solutes with micellar mobile phases; static modification was implemented by immersion of the plates for 1 min into 0.1 M methanol solutions of the surfactant. - Detection under UV 254 nm.

Proc. Intern. Symp. on Planar Separations Plan. Chrom. 231-242 (2003). Preparation and characterization of octadecyl-, 3-mercaptopropyl-, and N-(2-aminoethyl)-3-aminopropyl modified alumina by elemental analysis, specific surface area, FTIR spectroscopy, mass spectrometry and thermal analyses. The TLC behavior of unmodified and modified acidic alumina was tested for the separation and identification of some dyes and benzo[a]pyrene derivatives.

J. Chromatogr. A 1218 (19), 2692-2699 (2011). HPTLC coupled with bioluminescence detection can be used for screening for unknown substances. So far the HPTLC plate was dipped in an aqueous solution of Vibrio fischeri bacteria. However polar substances may be dissolved during this process, which leads to blurring and tailing of the zones on the plate. This was overcome by application of the bacteria solution by rolling. A rolling device was made of commercially available household articles and tested using octhilinone and methylparaben. Comparison of rolling with dipping showed that despite the manual steps involved in the rolling process, the results were reproducible. Depending on the substance and its amount on the HPTLC plate, with rolling peaks were narrower, up to a factor of 4 higher and showed a higher signal-to-noise ratio than with dipping.

J. Planar Chromatogr. 13, 82-87 (2000). Description of the possibility of applying mixtures of substances to TLC plates by use of different types of filter (chromatographic) paper as concentrating zones. The resolution of achromatographic systems has been compared after use of different modes of solute application - applicator (point and linear application), micropipet, use of plates with concentrating zone, and use of different filter papers as concentrating zone. The proposed use of paper as a concentrating zone increases the resolution of a chromatographic system compared with a micropipet; resolution is comparable with that obtained on commercially available plates with concentrating zones.

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.