J. Planar Chromatogr. 18, 314-318 (2005). TLC of iridoids (e. g. aucubin, catalpol, harpagide, 8-O-acetylharpagide, ajugoside) from aqueous plant extracts on silica gel with chloroform - methanol - water 25:10:1 and 160:55:8 and ethyl acetate - formic acid 7:4. Detection by spraying with a solution of 1 % 4-dimethylaminebenzaldehyde in conc. HCl containing acetic anhydride (Ehrlich’s reagent) and heating at 105 °C for 5 min. Quantitation by densitometry at 540 nm.

Abstract G-26, IPC (2005). A simple HPTLC method is reported for analysis of guggulsterones E and Z in herbal extract and market formulations containing commiphora mukul. Guggulsterones were extracted from crude extract and formulations by ethyl acetate. HPTLC on silica gel with n-hexane - ethylacetate 3:1. Quantitative determination by absorbance measurement at 250 nm. The hRf value of E-guggulsterone was 38 and of Z-guggulsterone 46, linearity range for both isomers was 200-5000 ng/mL. The method was validated as per ICH guidelines.

J. Chinese Trad. Patent Med. (Zhongchengyao) 27(4), 483-485 (2005). TLC of tanshinone llA extracted from the title Chinese traditional patent medicine on silica gel with benzene - ethyl acetate 19:1. Quantitative determination by densitometry at 470 nm. Also determination of the compound by HPLC.

J. Planar Chromatogr. 19, 200-203 (2006). TLC of 18 phenolic acids (salicylic, m-hydroxybenzoic, p-hydroxybenzoic, protocatechuic, alpha-resorcylic, beta-resorcylic, gallic, vanillic, syringic, gentisic, veratric, cinnamic, o-coumaric, m-coumaric, p-coumaric, caffeic, ferulic, and sinapic acid) an aminopropyl silica gel, prewashed with methanol and acetone, in a horizontal DS-chamber with mobile phases comprising mixtures of diisopropyl ether and acetic acid with toluene, petroleum ether, or heptane, partly with two developments. The best separations were obtained with heptane - diisopropyl ether - acetic acid 4:5:1, or petroleum ether - diisopropylether - acetic acid 6:3:1. Detection under UV light at 254 or 366 nm.

Planta Med. 71, 659-665 (2005). Preparative TLC of robustaflavon 7,4’,4’’’-trimethyl ether on silica gel with chloroform - methanol 3:1, of robustaflavone 4’,4’’’-dimethyl ether on RP18 with methanol - water 6:1, of 2,3-dihydroamentoflavone 7,4’,7’’’-trimethyl ether on silica gel with ethyl acetate - methanol 4:1, of 2,3-dihydroamentoflavone-7,4’-dimethyl ether on RP18 with methanol - water 8:1, and of 2’’,3’’-dihydroisocryptomerin 7-methyl ether on silica gel with chloroform - methanol 3:1. Detection under UV light at 254 nm.

J. Chinese Trad. Patent Med. (Zhongchengyao) 27 (7), 778-790 (2005). TLC of the extracts of Tongmai Jiangzhi capsules on silica gel with methanol - ethyl acetate - formic acid 55:12:6. Detection by exposing to ammonia vapor until the spots are visualized. Identification by fingerprint techniques. Quantification of curcumin, emodin, and chrysophanol by HPLC. The procedure was validated. The results for four batches of real life samples are given.

Planta Med. 70, 828-833 (2004). Preparative TLC of driportlandin, portlanquinol as well as formonetin and davidigenin on silica gel (by x-fold development) with dichloromethane - methanol 49:1 (2 x), dichloromethane - diethyl ether 19:1, dichloromethane - ethyl acetate 19:1 to 47:3; chloroform - ethyl acetate 9:1 (4 x), and dichloromethane - methanol 19:1 (2 x). Detection under UV light at 254 nm and by spraying with sulfuric acid - acetic acid - water 1:20:4, followed by heating.

J. Chinese Trad. Patent Med. (Zhongchengyao) 27(5), suppl. 1-3 (2005). TLC of cinnamyl aldehyde in Chongcao Yangshen capsules on silica gel with petroleum ether (60 - 90 ºC) - ethyl acetate 6:1. Detection by spraying with 2,4-dinitrophenylhydrazine reagent. Quantification by densitometry at 514 nm. Validation of the method by investigation of its linearity range (0.0.3 µg - 2.5 µg, r = 0.99); precision (RSD = 1.1 %, n = 5); its reproducibility of five time assay towards the same sample (RSD = 1.2 %); standard addition recovery (99.9 %, RSD = 1.3 %, n = 5). The results for three batches of real life samples are given. Discussion of the application of the procedures for the quality control of the medicine.