Chinese J. Trad. Pat. Med. (Zhongchengyao) 27 (2), 176-178 (2005). HPTLC on silica gel with 1) cyclohexane; 2) cyclohexane - ethyl acetate 9:1. Detection 1) by spraying with 5 % phosphomolybdic acid in ethanol; 2) by spraying with vanillin - conc. H2SO4 solution. Identification of volatile oil by fingerprint technique. Determination of total lignan content by spectrophotometry. Analysis of the processing principle by comparison of the contents of the volatile oil and lignans in the extracts obtained by using different processing procedures, and discussing of the optimal processing procedures.

J. Chinese Trad. and Herb. Drugs (Zhongcaoyao), 36 (2), 277-280 (2005). HPTLC on silica gel with toluene - ethyl acetate - water - formic acid 20:10:1:1. Detection under UV 365 nm. Identification of volatile oil by fingerprint technique, combined with microscopy and a chemical method. Quantification of aristolochic acid A by HPLC.

Chinese J. Trad. Pat. Med. (Zhongchengyao) 26 (9), app.19-20 (2004). HPTLC on silica gel with petroleum ether (30 - 60 ºC) - formic acetate - formic acid 15:5:1, at 11 ºC and humidity of 40 %. Detection by exposing to ammonia vapors. Identification by fingerprint technique and comparison with the standards.

J. Planar Chromatogr. 18, 415-418 (2005). TLC of macrolide antibiotics (roxithromycin, midecamycin, erythromycin, azithromycin, and erythromycin ethylsuccinate) on cellulose with aqueous ammonium sulfate solutions concentrated from 0.5 to 4.0 M. Detection by exposure to iodine vapor.

J. Chinese Trad. Patent Med. (Zhongchengyao) 27 (3), 279-282 (2005). TLC of the extracts of the title Chinese traditional patent medicine on silica gel with 1) ethyl acetate - methanol - ammonia 17:2:1; 2) n-butanol - glacial acetic acid - water 19:5:5. Detection 1) under UV 365 nm; 2) by spraying with ninhydrin solution followed by heating at 105 ºC until the spots are visualized. Identification by fingerprint technique. Quantification of paracetamol and pseudoephedrine arginine by HPLC.

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.

Talanta 61 (5), 581-589 (2003). TLC of clopidogrel bisulphate on silica gel with carbon tetrachloride - chloroform - acetone 12:8:3. Rf value of clopidogrel bisulphate was 0.30. Clopidogrel bisulphate was subjected to acid and alkali hydrolysis, oxidation, photodegradation and dry heat treatment. The drug was susceptible to acid - base hydrolysis, oxidation and dry heat degradation. Also the degraded products were well separated from the pure drug with significantly different Rf values. Quantitative determination by absorbance measurement at 230 nm. The linear regression data for the calibration plots showed good linear relationship with r2=0.999 in the concentration range of 200-1000 ng. The mean value of correlation coefficient, slope and intercept were 0.999±0.001, 0.093±0.011 and 8.83±0.99, respectively. The method was validated for precision, accuracy, ruggedness and recovery. The limits of detection and quantitation were 40 and 120 ng per spot, respectively.

J. Pharmaceutical Research 4 (3), 55-57 (2005). HPTLC of indapamide on silica gel with toluene - methanol 7:3. Quantitative determination by absorbance measurement at 246 nm. The method was linear within the range of 1.4-3.7 µg/mL. Mean recovery values were 99.46-100.29 %. The method was validated for accuracy, precision, and specificity.