J. Planar Chromatogr. 32, 55-57 (2019). TLC of dimethyl phthalate, diethyl phthalate, di-n-butyl phthalate, diisobutyl phthalate, diallyl phthalate, and bis(2-ethylhexyl) phthalate on silica gel with petroleum ether - ethyl acetate - phosphoric acid 9:1:1. Detection by spraying with 0.1 % 2,6-dichlorophenolindophenol with the instantaneous appearance of pink-colored zones.

J. Chromatogr. A 1155 (1), 112-123 (2007). Presentation of a novel strategy for the fractionation of complex peptide mixtures using two-dimensional planar electrochromatography/thin-layer chromatography (2D PEC/TLC). It was found that phosphopeptides migrate more slowly in the first dimension, based upon their anionic phosphate residues, and certain predominantly acidic phosphopeptides even migrate in the opposite direction, relative to the bulk of the peptides. Further distinguishing phosphopeptides based upon hydrophilicity in the second dimension, which permits a restricted region of the plate to be directly interrogated for the presence of phosphopeptides by MS. Discussion of peptide sequencing and identification of phosphopeptide from the plates by matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF)-MS and tandem MS.

Budapest Chromatography Conference, June 2, 1983. Review article. Application of overpressured TLC, comparison of TLC and HPTLC, a novel type of overpressured thin-layer chromatography.

(Introduction to quantitative thin-layer chromatography: basics, possibilities, automation (part 8). Kontakte 2, 40-45 (1983). This paper deals with a summary of the different types of errors in quantitative TLC. Errors caused by the chromatographic process, by the sorbent layer or by the evaluation techniques are discussed. While apparatus-dependent errors are generally difficult to eliminate, many errors in the evaluation techniques may be avoided. The problem of error propagation is also discussed with experimental examples (8 refs.).

J. Planar Chromatogr. 4, 154-157 (1991). Description of documentation of chromatograms by photography under UV light or daylight with color negative prints or transparencies including archiving the films.

J. Planar Chromatogr. 28, 472-475 (2015). HPTLC of 17α-ethinylestradiol (extracted from water samples using a monolithic stir-bar) on RP-18 with methanol - acetonitrile - water 2:2:1. Detection by heating at 110 °C for 10 min followed by dipping into a mixture of sulfuric acid 98 % in water 1:49 for 1 s. After dipping the plate was heated again to 110 °C for 10 min. The hRF value for 17α-ethinylestradiol was 51.

Anal. Chim. Acta 236, 83-97 (1990). Summary of the state of art of various preparative planar liquid chromatographic methods for off-line and on-line sample application. Discussion of sample purification possibilities for PLC techniques. Suggestions in form of flow charts for purification and isolation strategies using forced-flow planar chromatographic techniques, such as OPLC, etc.

J. Planar Chromatogr. 23, 426-433 (2010). Mobile phases without addition of buffer salts could be successfully used in planar electrochromatography with a new type of RP-18 sintered plate, prepared from a 1:4 mixture of silica gel for TLC and powdered glass which was suspended in a solution of 0.3 % CMC-Na. The sintering step was the same as already described in J. Planar Chromatogr. 19, 313-318 (2006) except for the temperature which was 651 °C. A suitable degree of bonding of C18 was from 0.03 to 0.06, and good end-capping was achieved by placing the bonded sintered plates in a solution of dimethyldichlorosilane in toluene (ratio 1:100 to 1:1000) at room temperature for 20 min.