J. AOAC Int. 82, 587-598 (1999). Description of a new automated overpressured-layer chromatographic (OPLC) system which is suitable for analytical and semipreparative separations. The automatic microprocessor-controlled system ensures rapid and reproducible off-line isocratic and stepwise gradient separations. With optimum linear velocity theoretical plate heights of 10 - 30 µm resp. 6 - 15 µm can be reached (on irregular silica gel with an average particle size of 5µm resp 3 µm spherical silica gel). Rapid analytical separations of resveratrol (1555 s) and xanthine by one- (498 s) and two-directional (274 s) off-line developments were accomplished.

R.E. Kaiser (Ed) Proc. of the 3rd Int. Symp. on Instr. HPTLC, IfC, Bad Duerkheim 1985, 475-488. Emphasis on influence of the noise caused by the particles and mechanical defects (structure) of the layer on quantitative TLC analysis. Improvement of accuracy and repeatability by total area quantification prior and after the chromatographic step of TLC cross correlation of quantitative and qualitative data.

J. Liquid Chromatogr. 18, 1405-1427 (1995). Presentation of a method for the computer assisted selection of the mode of TLC development for the separation of ten phenolic components, based on simulation of isocratic and gradient development. Investigation of the different combinations of isocratic and gradient development in one and two dimensions. Evaluation of the quality of the chromatograms by application of criteria such as the distance function and multipeak criterion.

J. Planar Chromatogr. 29, 361-365 (2016). Analysis of phenols in bio-oil from agricultural wastes obtained during fractionation. Column chromatography (CC) on silica gel in a glass column (i.d. 1 cm, 50 cm length) filled with n-hexane. The concentrated organic phase was mixed with silica gel 1:1, loaded onto the column and successively eluted with dichloromethane – acetone 20:1, ethyl acetate, and methanol. 24 eluate fractions were obtained during the fractionation using CC, 12 with dichloromethane – acetone mixture, 5 with ethyl acetate, and 7 with methanol. Phenolic compounds were present only in the dichloromethane – acetone mixture fraction which was therefore selected as the proper eluent to obtain all the phenolic fractions dissolved. To monitor the fractionation, TLC of the eluates on silica gel in saturated chambers (mobile phase not specified) to a distance of 4 cm. Qualitative identification under UV 254 nm and by exposure to iodine vapor. The hRf values of the standard solutions of phenol, cresol and guaiacolin dichlorlomethane were 66, 68 and 78, respectively. Eluate fractions were further analyzed by GC–FID and GC–MS.

J. Planar Chromatogr. 1, 220-226 (1988). Description of the construction and the characteristics of an interface for coupling CLC and TLC. Investigation of proper eluent for deposition. Discussion of the shape of the deposited spots and chromatographic features and the repeatability of the deposition process.

Anal. Biochem. 188, 181-186 (1990). TLC of GPC fractions of NaBH4-labeled oligosaccharides on 3-aminopropyl-bonded silica with acetonitrile - 10 mM triethylamine acetate 3:2. Detection and mapping according to size, anionic charge, and sugar composition. Determination of the distribution of oligosaccharides on bovine submaxillary mucin and rat gastric mucin.

Chromatographia 35, 627-630 (1993). TLC separation of free fatty acids into two fractions, a more mobile group of saturated and monounsaturated fatty acids and a less mobile group containing polyunsaturated fatty acids, on silica with hexane - acetic acid - water 50:2:1. Detection by exposure to iodine vapor, and under UV 254 nm. Determination of polyunsaturated fatty acids by HPLC.

J. Chromatogr. A 803, 235-239 (1998). Modeling of ion-pair HPLC separations by using continuous OPLC. Study of the distribution of several cationic ion-pairing reagents on the layer with mobile phases containing different quaternary ammonium salts, which volumes varied between 4.5 to 67.5 cm3 equivalent to a 1 to 15 bed volume of the given layer. Measurement of the concentration of the reagents after chromatography in 10 samples of the stationary phase used.