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.

European Chromatography News 2, 18-21 (1988). Description of some of the many recent innovations like advances in TLC plates, sample application, development techniques and instrumentation for detection, quantification and identification. TLC is described as a sensitive instrumentalized quantitative analytical technique.

J. Planar Chromatogr. 2, 53-61 (1989). Construction of the new instrument with the principle of five rotation planar chromatographic methods. The efficiency of the RPC methods demonstrated with the separation of saponin glycosides from Panax ginseng and some furocoumarin isomers from Pastinaca sativa. For preparative separation, an extract from Peucedanum palustre was chosen.

J. Liquid Chromatogr. 13, 2001-2011 (1990). Comparative studies of two methods for predevelopment TLC plate cleaning: ascending development and dip washing using several solvents and solvent combinations. Visualization of residues remaining on the plate surface by densitometry.

Biokémia, 15, 154-155 (1991). Study of the formaldehyde cycle by OPLC using off-line and on-line techniques. Separation of N-, S- and O-methylated compounds of the HCHO cycle. Review with 7 references.

J. Planar Chromatogr. 5, 184-191 (1992). RM values of some basic drugs (used mainly against Parkinson’s disease) and related compounds have been measured by RPTLC with a variety of ion pair reagents in the mobile phase or stationary phases. Retention and separation selectivity were readily controlled by changes in the eluent pH, methanol (modifier) content, or type and concentration of the ion pair reagent. - The strongest effect on the retention of the compounds was obtained when ion pair reagent was incorporated into the stationary phase.

J. Planar Chromatogr. 7, 477-480 (1994). Description of a computer-assisted direct scanning method for simultaneous two-factor (initial concentration, C1, and initial mobile phase volume V1) optimization of the separation of a mixture of seven compounds by stepwise gradient HPTLC.

Proc. 9th Internat. Symp. Instr. Chromatogr., Interlaken, April 9.-11., 261-271 (1997). Description of different TLC techniques like e.g. affinity thin-layer chromatography, anticircular development TLC, centrifugal development TLC, channel TLC, charge transfer TLC, circular or radial TLC, continuous development TLC, dual band TLC, gradient elution TLC, HPTLC, hot plate TLC, ion-pair formation TLC, linear development TLC, multiple development TLC, over-pressurized TLC, partition TLC, plain TLC, preparative TLC, programmed multiple development TLC, reversed-phase ion-pair TLC, reversed-phase partition TLC, rod TLC, step-wise or sequential development TLC, two dimensional development TLC, vapor programmed development TLC.