Chromatographia 44, 50-54 (1997). HPTLC on silica with chloroform - methanol 19:1. Detection by densitometry at 254 nm, then heating to ca. 170°C for 12 min, cooling to room temperature and dipping for 4 s into hexane-paraffin 2:1. Quantification by fluoro-densitometry at 366/>400 nm or by radioimmunoassay. Comparison of the results with those obtained by HPLC.

J. Chinese Trad. Patent Med. (Zhongchengyao) 24 (4), 246-248 (2002). The dissolution quantities of ferulic acid in 60 min were determined by TLC on silica gel with hexane - chloroform - acetic acid 8:8:1. Detection under UV 365 nm. Quantitation by densitometry at 328 nm.

59th Indian Pharmaceutical Congress C-220, 277, (2007). HPTLC of gallic acid in fruits of Emblica officinalis, on silica gel with touene - ethyl acetate - acetic acid - formic acid 4:9:4:3. Densitometry at 277 nm for quantitative evaluation. The method was linear in the range of 10 and 1000 ng/mL, with an average recovery of 101.4 %. The method was found suitable for routine quality check-up of Emblica officinalis.

Chromatographia 67 (7-8), 607-613 (2008). Quantitative estimation of the two major alkaloids strychnine and brucine in Strychnos nux vomica by TLC on silica gel with chloroform - ethyl acetate - diethyl amine 1:17:2. The hRf values for strychnine and brucine were 55 and 42 and selectivity regarding matrix was given. Recovery was between 93.1 and 99.8 % for strychnine and between 96.9 and 99.5 % for brucine. The limit of detection and quantification for strychnine was 2 and 8 ng, respectively, and for brucine 2 and 9 ng, respectively.

Ind. J. of Pharma Sci. 70(6), 844-847 (2008). HPTLC of plumbagin in alcoholic root extracts of Plumbago indica and Plumbago zeylanica on silica gel with n-hexane - ethyl acetate 4:1. The hRf value of plumbagin was 67. Quantitative determination by absorbance measurement at 265 nm. Plumbago indica showed significantly higher plumbagin contents than P. zeylanica. The HPTLC method was the method of choice for simultaneous analysis of several samples, whereas the RP-HPLC method was very sensitive.

Journal of Pharmacy Research 3(2), 332-334 (2010). HPTLC on silica gel with methylene chloride - methanol - ammonia 17:2:1. The hRf value of amlodipine was 19 and of nebivolol 41. Densitometric evaluation at 285 nm. The method was linear in the range of 100-500 ng/band for both compounds. The average recovery was 99.9-102.1 for both compounds and there was no interference with additives present in tablet dosage forms.

J. of Chromatogr. Sci. 49, 129-135 (2011). TLC on silica gel with ethyl acetate – chloroform – formic acid – triethyl amine 70:30:1:1. Detection and quantification by densitometry. Good correlation between the integrated peak area of the studied drugs and their corresponding concentrations was found in different ranges.

Chinese J. of Med. Guide 18 (12), 82-84 (2012). Fufang Kuhuang Penwu spray is a herbal TCM preparation for treatment of eczema, skin itch and solar dermatitis. For quality control, TLC on silica gel 1) for borneol, with cyclohexane – ethyl acetate 33:7, detection by spraying with 1 % vanillin in sulfuric acid – ethanol 1:4, heating at 105 °C until the zones are visible in daylight; 2) for Cortex Phellodendri Chinensis and the standard berberine hydrochloride, with benzene – ethyl acetate – methanol – isopropanol – concentrated ammonia 12:6:3:3:1, detection under UV 366 nm; 3) for Rheum palmatum L., Reynoutria japonica Houtt, and the standard emodin, with petroleum ether (30-60 °C) – ethyl formate – formic acid 15:5:1, detection under UV 366 nm before and after exposure to ammonia vapors.