Planta Med. 71, 673-679 (2005). Analytical and preparative TLC of 18-(beta-D-glucopyranosyloxy)-28-oxoolean-12-en-3beta-yl 3-O-(beta-D-glucopyranosyl)-beta-D-glucopyranosiduronic acid methyl ester, achyranthoside C dimethyl ester, achyranthoside C butyl dimethyl ester, achyranthoside E dimethyl ester, achyranthoside E butyl methyl ester (and 10 known compounds) on silica gel and RP18 with chloroform - methanol - water 8:5:2 or methanol - water 1:1, respectively. Detection under UV light at 254 nm or by spraying with cerium sulfate - 10 % sulfuric acid 1:99.

Synthesis of 13-oxa-prostacyclins. Acta Chimica 113, 355-365 (1983). TLC of 13-oxa-prostacyclins on silica with chloroform - acetone - ethyl acetate 7:3:0.1. Detection by UV 254 nm.

Planta Med. 70, 1216-1221 (2004). TLC of 20-formylbenz[6,7]indolizino[1,2-b]quinolin-11(13H)one, 10-methoxy-20-O-acetylcamptothecin, 20-O-beta-glucopyranosyl-18-hydroxycamptothecin, 3,4-methylenedioxy-3’-O-methyl-5’hydroxy ellagic acid and 18 known compounds on silica gel with chloroform - methanol 4:1, chloroform - ethyl acetate 6:1, ethyl acetate - hexane 4:1, and ethyl acetate - acetone 1:4. Detection under UV light.

J. Chromatogr. 274, 289-298 (1983). TLC of metamizole metabolites on silica with chloroform - methanol - ether -25 % NH3 25:5:6:1. In situ fluorometry at 265 nm.

J. Liq. Chromatogr. & Relat. Technol. 29, 2141-2151 (2006). HPTLC of flavonoids (with rutin, chlorogenic acid, hyperoside, and gallic acid as reference substances) on silica gel in a twin-trough chamber with ethyl formate - toluene - formic acid - water 60:3:8:6. Detection by dipping the hot plate (heated at 100°C for 2 min) into natural products reagent, followed by drying, dipping into polyethylene glycol 400 (10 g in 200 mL dichloromethane), and drying. Evaluation under UV 366 nm. With this method the geographical origin of the material can be determined. Toluene - acetone - formic acid 9:9:2 allows the discrimination of green from black and other speciality teas, based on the polyphenol pattern. Detection by dipping the hot plate (heated at 100°C for 2 min) into a solution of Fast Blue salt B, followed by detection under white light. For investigation of the alkaloid profil ethyl acetate - methanol - water 20:2.7:2, followed by detection under UV 254 nm is used. The amino acid profile is analyzed by using 1-butanol - acetone - acetic acid - water 7:7:2:4. Detection by dipping into ninhydrin reagent, followed by heating at 110°C for 3 min and evaluation under white light. The method for polyphenols was validated regarding specificity, stability, reproducibility, and robustness.

(Simultaneous assay of piroxicam in plasma samples using HPTLC and HPLC.) Fresenius Z. Anal. Chem. 318, 257-258 (1984). HPTLC of piroxicam on silica. Quantification by fluorescence at 365 nm. Reproducibility 6 % for TLC., 7.7 % for HPLC.

Pharmazie 60, 953-955 (2005). TLC of cochleareine, acoleareine, 14-acetyltalatisamine, and talatisamine on silica gel. Detection under UV light at 254 nm. Also co-chromatography with standards. Using a Chromatotron apparatus the crude alkaloidal mixture was separated on alumina radial plates and eluted with a gradient of petroleum ether, chloroform, and methanol.

J. Chromatogr. 439, 317-339 (1988). TLC on silica with a) cyclohexane - toluene - diethylamine 75:15:10, b) chloroform - methanol 9:1, c) chloroform - acetone 8:2 for benzodiazepines and a) toluene, b) toluene - isopropanol - NH3 85:15:1, c) chloroform - methanol 9:1, d) chloroform - acetone 8:2 for benzophenones. Detection under UV and by spraying with iodoplatinate solution for the former and with Bratton- Marshall test for the latter.