Chinese J. Hosp. Pharm. (Zhongguo Yiyuan yaoxue Zazhi) 25 (1), 90-92 (2005). TLC on silica gel with chloroform - ethyl acetate - formic acid 2:2:1. Detection under UV light. Identification by fingerprint technique. Quantification by densitometry at 325 nm. Validation of the method by investigation of linearity (0.52 µg - 4.68 µg, r = 0.9992); precision (RSD = 2.20 %, n = 5); reproducibility of five time assay towards the same sample (RSD = 3.10 %); standard addition recovery (99.0 %, RSD = 0.26 %, n = 5). The results for three real life samples are given.

Chinese J. Trad. Pat. Med. (Zhongchengyao) 27(1), 34-37 (2005). TLC on silica gel with 1) benzene - acetone - ethyl acetate - ammonia water 10:15:20:1; 2) ethyl acetate - butanone - formic acid - water 5:3:1:1; 3) n-butanol - glacial acetic acid - water 7:1:2. Detection 1) by spraying with potassium iodobismuthate solution; 2) by spraying with 2 % FeCI3 in ethanol; 3) by spraying with vanillin - H2SO4 solution and heating; 4) under UV light. Identification by fingerprint technique. Quantification of geniposide by HPLC. The results for ten real life samples are given.

J. AOAC Int. 87, 827-833 (2004). TLC of trimetazidine dihydrochloride and degradation products (e. g. piperazine and 2,3,4-trimethoxymethyl benzene) on silica gel with methanol - ammonia 200:3. Detection under UV light at 254 nm and densitometry at 215 nm. The method was applicable over a concentration range of 2.00-9.00 µg/spot with a mean percentage accuracy of 99.86 +/- 0.92.

Abstract G-9, IPC (2005). HPTLC of pantoprazole and mosapride in combined dosage form on silica gel with methanol - toluene - chloroform 4:30:15. Quantitative determination by absorbance measurement at 305 nm. The hRf value of pantoprazole was 31 and of mosapride 43, recovery was 99.9-101.1 %. Accuracy, precision, and linearity of the method were established.

Abstract G-29, IPC (2005). HPTLC of valdecoxib in tablets and human plasma on silica gel with methanol - water - chloroform 6:3:1. Celecoxib was used as internal standard. Quantitative determination by absorbance measurement at 254 nm. The compound was extracted from plasma with ethyl acetate showing an extraction yield of 85 %. Linearity was obtained in the range of 25-200 ng/mL, recovery rate was 99.8 % from tablets and 97.2 % from plasma.

J. Chinese Trad. Patent Med. (Zhongchengyao) 27 (4), 407-410 (2005). TLC of the extracts on silica gel with 1) benzene - ethanol 2:1 and 4:1; 2) n-butanol - glacial acetic acid - water 7:1:2; 3) chloroform - methanol 9:1. Detection under UV 365 and 254 nm. Identification by fingerprint technique. Quantification of 2, 3, 5, 4’-tetrahydroxystilbene-2-O-beta-D-glucoside by HPLC. The analysis results for a group of real life samples are given.

J. Sep. Sci. 28 (6), 575-580 (2005). HPTLC of pentoxifylline and related substances, impurities of reaction partners and side reaction products, on LiChrospher RP18 with acetone - chloroform - toluene - dioxane 2:2:1:1. Quantitative determination at 275 nm. Linearity (r2= 0.997), recovery (86.5-115.5 %) and determination limit (0.1-0.6 %) were evaluated and found to be satisfactory. This method enables monitoring of the synthesis as well as purity control of pentoxifylline-containing raw materials and pharmaceuticals.

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.