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. Liq. Chromatogr. Relat. Technol. 36, 2512-2523 (2013). The paper described the influence of several operating variables of online injection into the pressurized planar electrochromatography (PPEC) separation system. Variables that enable narrow and symmetrical peaks such as sample volume, flow velocity, shapes of the grooves and polarization potential were discussed.

J. Planar Chromatogr. 12, 373-377 (1999). Description of a new multi-applicator for simultaneous deposition of up to 15 samples, successively on several plates of different sizes. Acepromethazine was used as test analyte, and plates were scanned at 375 nm. The multi-applicator furnished reliable results, both qualitatively - good inter-capillary reproducibility, and adaptibility - and quantitatively - satisfactory linearity, reproducibility, correlation with an autosampler.

GIT Suppl. Chromatogr. 3, 32-38 (1986); part II: GIT Fachz. Lab. 10, 993-998, (1986). Principle and applicability of TLC using mobile phase pressure of up to 80 bars. Circular development of single sample injected in-flow and of multi samples applied on the dry layer. Use of normal and reversed phase material, including multiple use of the same layer. Quantification of the chromatograms by direct image processing using optical sensitive RAM.

J. Planar Chromatogr. 13, 470-472 (2000). Evaluation of the application of new materials (both chromatography and filter paper) as the concentrating zone; evaluation of the possibility of combining paper and TLC on a flexible support; and realization of a simple variant of the technique (paper and TLC plate) which would enable realization of the technique in any laboratory. TLC of methyl orange, methyl red and methyl green (0.1% in ethanol) with ethanol as mobile phase on silica gel with concentrating zone and Sorbfil polymer resp. on silica gel with chromatography paper instead of the concentrating zone.

Analyst 112, 1171- 1172 (1987). Description of a simple device for applications of samples to TLC plates with the reproducibility comparable to that of standard methods and suitability for quantification. Several examples were given.

Proc. Intern. Symp. on Planar Separations, Planar Chromatography 2001, pp. 127-136. Examination of the influence of the application method of samples on the migration of their components, dimension of spots on the developed chromatogram, resolution and the number of HETP. TLC of a standard mixture of dyes on silica gel with toluene. A new method of application is the use of a filter paper: A given volume of solute is applied on the filter paper - in the form of a triangle - using a calibrated micropipette, then by means of the mobile phase the solute is transferred from the filter to the sorbent layer.