and its compound preparations by thin-layer chromatography) (Chinese). Chinese J. Chromatogr. (Sepu) 23 (2), 216-217 (2005). TLC on silica gel by 2-fold development with cyclohexane - ethyl acetate 10:1 followed by cyclohexane - ethyl acetate 2:1. Detection by spraying with H2SO4 - ethanol 1:10 followed by heating at 105 ºC for 5 min. Visualization under UV 365 nm.

J. Chinese Trad. Patent Med. (Zhongchengyao) 27 (7), 780-782 (2005). TLC of Qiwei Ketengzi pills on silica gel with benzene - methanol - formic acid 180:30:2. Detection by spraying with 5 % vanillin - sulfuric acid solution followed by heating at 105 ºC until the spots are visualized. Identification by fingerprint techniques. Quantification of vitexicarpin by HPLC. The results for three batches of real life samples are given.

J. Liq. Chromatogr. Relat. Technol. 29, 1247-1256 (2006). TLC of MDMA (3,4-methyledioxymethamphetamine) and additives (magnesium stearate, aspirin, paracetamol, caffeine, glucose, citric acid) with acetonitrile - chloroform 1:1, chloroform - methanol 9:1 (best separation), acetonitrile - chloroform - ammonia 2:8:1, chloroform - methanol - ammonia 9:1:1, and chloroform - acetone - methanol - ammonia 10:8:1:1. Detection under UV 254 and 366 nm.

59th Indian Pharmaceutical Congress C-43, 234, (2007). HPTLC of Z-guggulsterone (a steroidal ketone present in oily resin of Commiphora mukul) and five marketed ayurvedic tablet formulations containing guggul, on silica gel with toluene - propane-1-ol - glacial acetic acid 8:1:1. Densitometry at 254 nm. The hRf of E-guggulsterone was 55. Several marketed formulations were evaluated for Z-guggulsterone, the UV spectra of the standard and that of the formulations were comparable in respect of Z-guggulsterone.The method was found suitable for evaluation of Z-guggulsterone in presence of other phytochemicals present in formulations.

60th Indian Pharmaceutical Congress PA-202 (2008). HPTLC of 6-gingerol and 3-acetyl-11-keto-beta-boswellic acid on silica gel with n-hexane - ethyl actate 7:3 in a chamber saturated at ambient temperature. Quantitative determination by absorbance measurement at 254 nm. The hRf values were 48 and 58 for 3-acetyl-11-keto-beta-boswellic acid and 6-gingerol respectively. The recovery was 98.7-100.8 % for both compounds. The chromatographic conditions were suitable for routine analysis.

J. Chinese Pharm. Standard 10 (4), 284-286 (2009). TLC of Naolibao pill extracts on silica with n-hexane - ethyl acetate 5:1. Qualitative identification by detection under UV 254 nm and 365 nm. The method is simple, rapid, reliable, and suitable for the quality control of the TCM formulation.

Research J. Pharm. and Tech. 3(2), 559-561 (2010). TLC on silica gel with toluene - acetonitrile - formic acid 50:50:3 with chamber saturation for 30 min. The hRf value was 27 for perindopril and 55 for losartan. Densitometric evaluation at 212 nm. The method was linear in the range of 5-30 µg/band and 1-10 µg/band for losartan and perindopril respectively. The average recovery was 98.2-99.9 %.

J. Trad. Chinese Veterinary Med. (5), 53-55 (2010). TLC on silica gel with acetone – ethanol – hydrochloric acid 10:6:1. Detection by spraying with bismuth potassium iodide – 1 % FeCl3 in ethanol 5:1 and heating at 100 ºC. Quantitative determination of stachydrine by absorbance measurement at 510 nm. The precision was 3.7 %RSD within plate (n=8), and the stability of the measurement within 120 minutes was 4.5 %RSD (n=5). The linearity range was 3.2-38.3 µg/zone (r=0.997, n=6) and standard addition recovery was 96.6 % (RSD=2.0 %, n=6).