J. of Chinese Med. 26 (160), 1088-1090 (2011). Dangshi tablets are a herbal TCM preparation for cleaning heat, diuresis, and dissolving stones, and are prescribed to cure urinary tract infections and acute nephritis. For quality control, TLC of the extracts of the medicine on silica gel 1) for Poria cocos, with petroleum ether (30-60 ºC) – acetone – ethyl acetate 85:15:1, detection at UV 366 nm; 2) for Licorice, with chloroform – methanol – water 40:10:1, detection by spraying with 10 % sulfuric acid in ethanol and heating at 105 ° until the zones are visible, evaluation in daylight.

J. of Chinese Med. 27 (166), 343-344 (2012). Baizhuhugan compound oral liquid is effective for enriching the blood, tonifying spleen, soothing the liver, and is clinically prescribed to cure chronic hepatitis and cirrhosis. For quality control, identification of the three contained herbal drugs by TLC of the extracts of the preparation 1) for Chinese Angelica, on silica gel with n-hexane – ethyl acetate 9:1, detection at UV 366 nm; 2) for Bighead Atractylodes rhizome, on silica gel with cyclohexane – ethyl acetate 7:3, detection by spraying with 10 % sulfuric acid in ethanol and heating at 105 °C, viewing in daylight; 3) for Chinese herbaceous Peony, on silica gel with chloroform - ethyl acetate – methanol – ammonia 8:1:4:1, detection by spraying with 5 % vanillin in ethanol – sulfuric acid 4:1 and heating mildly, viewing in daylight.

J. Liq. Chromatogr. Relat. Technol. 35, 1429-1443 (2012). Comprehensive HPTLC profiling of sugars, sugar alcohols, amino acids, flavonoids, and phenolic acids as well as further bioactive and antioxidative compounds in the Indian natural efficiency enhancer herbs Hippophae rhamnoides, Valeriana wallichii, Triticum aestivum, and fungus Cordyceps sinensis. HPTLC on silica gel with different mobile phases: for sugars, n-butanol–- isopropanol – acetic acid – boric acid solution 6:14:1:3, for amino acids, n-butanol – ammonia (25%) – pyridine – water 39:10:34:26, and for sugar alcohols, ethanol – ethyl acetate – water 7:2:1. Quantitative determination of sugars by absorbance measurement at 370 nm after derivatization with aniline diphenylamine o-phosphoric acid reagent (mixture of 70 mL aniline solution and 70 mL diphenylamine solution, 2 % in acetone each, and 10 mL o-phosphoric acid, 85%). Unknown marker compounds were characterized by HPTLC-attenuated total reflection fourier transform infrared spectroscopy (HPTLC-ATR FTIR) and HPTLC- electrospray ionization mass spectrometry (HPTLC-ESI-MS).

Chinese J. of Trad. Chinese Med. 21 (4), 585-586 (2012). Chuanxining pills are a herbal TCM preparation effective for tonifying kidney, relieving uneasiness of mind, body tranquilization, relieving a cough,and preventing asthma. They are prescribed clinically to cure bronchitis and pneumonectasis. For quality control, identification of the three main component drugs by TLC of the extracts of the preparations 1) for Epimedium davidii Franch, on silica gel with ethyl acetate – butanone – formic acid – water 10:1:1:1, detection by spraying with 2 % ferric chloride in ethanol and mild heating; 2) for Fructus Ligustri Lucidi, on silica gel with chloroform – methanol 40:1, detection by spraying with 10 % sulfuric acid in ethanol and heating mildly; 3) for Angelica sinensis, on silica gel with n-hexane - ethyl acetate 9:1, detection at UV 366 nm.

J. Planar Chromatogr. 25, 81-84 (2012). HPTLC of atorvastatin (1) and ezetimibe (2) on silica gel with methanol - toluene - chloroform - triethylamine 2:16:1:1. Quantitative determination by absorbance measurement at 259 nm. The hRf values of compounds (1) and (2) were 7 and 37, respectively. Linearity was in the range of 500-1500 ng/band for both (1) and (2). Intermediate/inter-day/intra-day precision was below 2 % (n=3). Mean recovery was 99.7 % for both active agents.

J. of China Pharm. 21 (10), 26-27 (2012). Yifeitongluo granules are a herbal TCM preparation for the combined treatment of deficiency of both qi and yin. TLC of the extracts of the preparations on silica gel 1) for Rhizoma Polygonati, with chloroform – methanol – acetic acid 5:4:1, detection by spraying with 2.5 % phosphomolybdic acid in ethanol and heating at 105 °C until the zones are visible; 2) for Viola yedonensis Makino, with toluene – ethyl acetate – formic acid 5:3:1, detection under UV 366 nm; 3) for Stemona sessilifolia (Miq.) Miq, with toluene – propanone – methanol 16:6:1 after preconditioning with ammonia vapors, detection by spraying with 5 % potassium iodobismuthate and viewing in daylight.

Phytochem. Anal. 24, 303-308 (2013). HPTLC of chicoric acid (1), chlorogenic acid (2) and echinacoside (3) in commercial Echinacea products on silica gel with ethyl acetate - formic acid - acetic acid - water 100:11:11:17. Qualitative identification under UV 366 nm. Images were quantified and transformed into chromatograms, as signal intensities (peaks) versus hRf (retention factor) for a artificial neural network (ANN) correlation. LOD were 19, 46 and 29 ng/band, whereas LOQ were 63, 154 and 98 ng/band for (1), (2) and (3), respectively.

J. Planar Chromatogr. 25, 150-155 (2012). HPTLC of methocarbamol (1) and its related substance guaifenesin (2) in two ternary mixtures with ibuprofen (3) and diclofenac potassium (4) on silica gel with ethyl acetate - acetone - triethylamine 62:35:6 + 1 drop formic acid. Quantitative determination by absorbance measurement at 222 nm for the first mixture and 278 nm for the second mixture. The hRf values for agents (1) to (4) were 78, 54, 14 and 12, respectively. Linearity was in the range of 2-12 µg/band for (1), 2-10 µg/band for (2), 4-20 µg/band for (3) and 0.2-2.2 µg/band for (4). The intermediate/inter-day/intra-day precision was below 1.5 %. Mean recovery for (1) to (4) was between 100.7 and 100.8 %.