J. Liquid Chromatogr. 17, 2737-2749 (1994). TLC on silica with methanol - chloroform 1:1. Detection by spraying with ninhydrin - collidin reagent. Quantification by densitometry at 200 nm for e-caprolactam before derivatization and 558 nm for e-aminocaproic acid after derivatization. Detection limits 200 µg and 20 µg, resp.

J. Agric. Food Chem. 46, 3747-3749 (1998). TLC of 14C 6PP on silica gel with hexane - ether - acetic acid 40:80:1. Detection under 254 nm UV. Quantification by HPLC and 1H and 13C NMR spectroscopy.

Planta med. 65, 194 (1999). Preparative TLC of 3',4-di-O-methyl-cedrusin on silica gel with ethyl acetate and of calylthropsin with chloroform - ethyl acetate 1:1. Detection under UV 254 nm.

Planta med. 68, 81-83 (2002). Preparative TLC of 2'-O-ethylmurrangatin and 2'-O-ethylmurrangatin acetate on silica gel with chloroform - methanol 19:1. Detection under UV light at 254 nm.

E-Journal of Chemistry 6(1), 295-302 (2009). HPTLC of rofecoxib and tizanidine on silica gel (plates pre-washed with methanol and dried at 110 °C) with toluene - ethyl acetate - methanol - triethyl amine 60:30:5:1 with chamber saturation for 15 min. The hRf value of tizanidine was 49 and of rofecoxib 68. Rosiglitazone was used as internal standard. Densitometric evaluation at 235 nm. The method was linear in the range of 3.75-11.35 µg/band for rofecoxib and 0.30-0.70 µg/band for tizanidine. The recovery was 99.6-101.0 %.

Food Chem. 151, 554-560 (2014). HPTLC of flavokavins A, B and C in the roots of kava (Piper methysticum) on silica gel with hexane - dioxane 4:1. Identification by absorbance measurement at 366 nm. Ratios between flavokavins (FKA, B, C) and kavalactones allowed an unambiguous identification of the cultivar noble kava and exclusion of two-days kava in exported material.

Marine Drugs 10(3), 551-558 (2012). For two fractions of an ethyl acetate extract of the broth of marine Streptomyces sp. strain M268, preparative TLC on silica gel with dichloromethane – methanol 49:1 for the isolation of three angucyclinones: 8-O-methyltetrangomycin, 8-O-methylrabelomycin and the new cytotoxic kiamycin (which possesses a 1,12-epoxybenz[a]anthracene structure). For further control, TLC of these substances on silica gel with dichloromethane – methanol 17:1, detection by spraying with 5 % sulfuric acid in methanol. The hRF values were 30, 30 and 40, respectively. _x000D_

Food Chem. 239, 1182-1191 (2018). HPTLC of coumarin in 43 commercially available cinnamons and cinnamon containing foods on silica gel with n-hexane – ethyl acetate – ammonia 76:26:1. Detection by dipping into a 10 % ethanolic potassium hydroxide solution, followed by drying, and dipping into a 10 % methanolic PEG 400 solution for stabilization of the fluorescence. Quantitative determination by fluorescence measurement at 366/>400 nm. The contents ranged from 0.3 to 5129 mg/kg with mean intermediate precisions of 4 %. The hRF value for coumarin was 50. LOD and LOQ were 200 and 400 pg/zone, respectively. Confirmation of preliminarily assigned coumarin zones was performed with a single quadrupol MS and HRMS. Effect-directed detection was also performed and coumarin was active against A. fischeri bacteria down to 100 ng/band.