J. Chromatogr. 489, 205-212 (1989). Introduction of a new detection system for the quantitative TLC analysis based on a relatively simple image analysis system. Applications for a number of samples containing anabolic compounds.

Adv. Chromatogr. (N.Y.) 30, 201-222 (1989). A review with 15 references on the error sources in densitometric evaluation of thin-layer chromatograms and electrophorograms, one- and two-dimensional versions, turbid and transparent media, comparison of slit scanning and spot scanning. Discussion of baseline, low concentration separations and gain correction.

J. Chromatogr. 655, 31-38, (1994). TLC of phenothiazines on silica with methanol - acetic acid 95:5. Detection by photochemical derivatization. Identification and quantification of propiomazine, acetopromazine and chlorpromazine by image analysis with a CCD camera, using both pseudocolor red-greenblue and grey-scale tones.

J. Chromatogr. A 786, 163-170 (1997). Investigation of the potential of photothermal beam deflection spectrometry (PTDS), photoacoustic spectroscopy (PAS), and photothermal radiometry (PTR) for the characterization of TLC plates with respect to the surface and in-depth distribution of the different compounds inside the sorbent. TLC of a test dye mixture and demonstration of the measurements using the three techniques.

Proc. Intern. Symp. on Planar Separations, Planar Chromatography 2001, pp. 15-21. HPTLC of benzo(a)pyrene on RP-18 with methanol - acetone 8:3. Spectrophotometry with a diode-array spectrophotometer working in the range of 197 to 612 nm with an average optical resolution of better than 2.0 nm.

J. Planar Chromatogr. 21, 49-54 (2008). Report of a new procedure for separation of complex mixtures by combining different modes of multidimensional planar chromatography on silica gel plates. Initially the complex mixture was separated into five groups of compounds. Mobile phases for separation of these different groups were then optimized by regarding each group as individual separation problem. By use of this new procedure 22 compounds from a complex mixture were separated on 10 x 10 cm TLC and HPTLC plates. TLC and HPTLC of 22 pesticides on silica gel with ethyl acetate - n-heptane 2:3 for TLC and 1:1 for HPTLC in the first direction. After removal of some of the adsorbent layer five further development steps with different eluents followed resulting in the complete separation of the 22 compounds of interest . Detection under UV 254 and 366 nm.

J. Planar Chromatogr. 6, 419-421 (1993). Description of a Video Image Archival System (VIAS) which meets the criteria of an ideal TLC documentation system. It comprises an UVP viewing cabinet fitted with UV254, UV366, and white light tubes, equipped with a copying stand. The chromatogram is recorded with a video camera; images and text are stored on optical disks.

(Dünnschichtchromatographie mittels Dioden-Array Detektion). GIT Spezial Separation I/2001, 37-39 (2001). Development of a HPTLC scanner for the measurement of spectra between 198 and 612 nm using a diode array detector. Quantitative HPTLC of caffeine on silica gel with isopropanol - cyclohexane - 25% NH3 7:2:1 and of uric acid, cytosine, guanine, caffeine, adenine, uracil and thymine on silica gel with isopropanol - toluene - 25% NH3 6:3:1. Measurement of 450 single spectra between 200 and 400 nm within 225 s.