Chinese J. of Guide for Trad. Chinese Med. & Pharm. 18 (5), 80-81 (2012). Weijianning capsules, a herbal TCM preparation for tonifying spleen and invigorating the stomach, is prescribed clinically to treat superficial, erosive and atrophic gastritis. Presentation of a TLC method for the quality control of the preparations optimized by investigating the sample extraction procedure and the mobile phases employed. TLC of the extracts on silica gel 1) for Radix Scrophulariae with ethyl acetate – ethanol – water 20:5:3, detection by spraying with a solution of 3 g vanillin – 100 mL ethanol – 0.5 mL sulfuric acid and heating at 105 °C until the zones were clearly visualized, evaluation in daylight; 2) for Fructus Amomi with n-hexane - ethyl acetate 3:1, detection by spraying with 10 % sulfuric acid in ethanol and heating at 105 °C until the zones were clearly visualized, evaluation in daylight. Identification by fingerprint comparison in parallel with the individual standard components.

J. Planar Chromatogr. 26, 147-152 (2013). TLC of poly(methylmethacrylate) (PMMA) on silica gel with acetonitrile binary solvent mixtures with carbon tetrachloride, toluene, methylene chloride, chloroform and dichloroethane. Mark-Kuhn-Houwink parameters for PMMAs, Snyder’s parameters and the measured intrinsic viscosity values for PMMA. The characteristics of adsorption-exclusion transition depends both on thermodynamic affinity of the solvent for the polymer and macromolecule-to-pore size ratio.

J. Ethnopharmacol. 148, 869-879 (2013). HPTLC of cantharidin in the blister beetles Epicauta hirticornis and Mylabris cichorii on silica gel with ethyl acetate - chloroform. Identification by absorbance measurement at 254 nm. The hRf of cantharidin was 78 and structurally defined as hexahydro-3a,7a-dimethyl-4,7-epoxyisobenzofuran-1,3-dione.

Chinese J. of Lishizhen Trad. Med. & Pharm. 22 (5), 1045-1048 (2011). Dieda Zhitong microemulsion spray is a traditional Chinese medicine effective in invigorate the circulation of blood, relieving blood stagnate, subsidence of a swelling, stop bleeding and relieving pain caused by injuries from falls, fractures, contusions, strains and traumatic injuries. For quality control, TLC of the extracts of the medicine 1) for Cnidium monnieri L. Cuss and Doubleteeth Pubescent Angelica root, on silica gel with petroleum ether (30-60 ºC) – ethyl acetate 9:1, detection by spraying with 10 % sulfuric acid in ethanol and heating at 105 °C until the zones were visible, viewing under UV 366 nm; 2) for Ligusticum wallichii and Rheum officinale on silica gel with petroleum ether (30-60 ºC) – ethyl acetate 9:1, detection under UV 254 nm; 3) for Oleum Ocimi gratissimi on silica gel with cyclohexane – ethyl acetate 4:1, detection by spraying with 10 % ferric chloride in ethanol and heating at 105 °C until the zones were visible; 4) for Oleum Anisi stellati on silica gel with petroleum ether (60-90 ºC) – ethyl acetate 19:1, detection by spraying with 5 % vanillin in ethanol and heating at 105 °C until the zones were visible; 5) for Oleum Eucalypti on silica gel with cyclohexane – diethyl ether - ethyl acetate 16:3:1, detection by spraying with 5 % vanillin in ethanol and heating at 105 °C until the zones were visible.

Jiangxi J. of Trad. Chinese Med. 43 (350), 59-61 (2012). Fufang Sanqidan capsules are a herbal TCM preparation for treating frequent urination, cardiovascular and cerebrovascular diseases, nephropathy etc. For quality control TLC on silica gel for 1) Radix Notoginseng and Radix Astragali, with the upper phase of n-butanol – ethyl acetate – 10 % ammonia 4:1:5, 2) for Salvia miltiorrhiza, with toluene – ethyl acetate 19:1, detection by viewing in daylight; and 3) for Mulberry Fruit, with petroleum ether (30-60 °C) – chloroform – ethyl acetate 3:8:5. All were detectied by spraying with 10 % sulfuric acid in ethanol and heating at 105 °C for 5 min, viewing under UV 366 nm. Quantification of astragaloside A by HPLC.

J. Chromatogr. A 1260, 232-238 (2012). Presentation of a new RP-HPTLC method for the separation of pyrazinamide, isoniazid, rifampicin and ethambutol in a four fixed-dose combination tablet formulation by detection of pyrazinamide, isoniazid and rifampicin at UV 280 nm firstly, and then derivatization and detection of ethambutol at 450 nm after RP-plate development. Evaluation of methanol, ethanol and propan-1-ol as the modifiers to form alcohol-water mobile phases. Systematic optimization of the composition of each alcohol in the mobile phase by using the window diagramming concept to obtain the best separation. Examination of the Rf distribution of the separated compounds indicated that separation of the compounds with the mobile phase containing ethanol at the optimal fraction situated within the optimal hRf-values region of 20-80, thus ethanol was selected as the organic modifier and the optimal mobile phase composition was found to be ethanol – water - glacial acetic acid - 37 % ammonia 70:30:5:1.

Chinese J. of Northern Pharm. 10 (2), 2-3 (2013). Xiaoer Danzhen granules are a herbal TCM for treating children with focal accumulation of heat, aphthae, hot urination, chicken pox, influenza fever, etc. For quality control, TLC on silica gel 1) for Radix Scutellariae and the standard astragaloside A, with n-butanone – glacial acetic acid – water 7:1:2, detection by spraying with 2 % ferric chloride in 2N HCl – water 1:100, and heating at 105 °C, viewing in daylight; 2) for Fructus Gardeniae and the standard gardenoside, with the lower phase of chloroform – methanol – water 13:7:2, detection by spraying with 10 % sulfuric acid in ethanol, and heating at 105 °C, viewing in daylight; 3) for Radix Angelicae Sinensis, with n-hexane – ethyl acetate – formic acid 45:5:1, detection under UV 366 nm.

J. Strait Pharm. 24 (11), 16-18 (2012). Yangyin Qingfei compound oral liquid is a herbal TCM preparation for treating cough, sore throat, tonsillitis, etc. For quality control, TLC on silica gel 1) for Rehmannia, with chloroform – methanol – water 14:6:1, detection by immersion into vanillin – sulfuric acid – acetic acid 1:10:1000 and heating at 105 °C, viewing in daylight; 2) for Radix Ophiopogonis, with toluene – methanol – glacial acetic acid 800:50:1, detection under UV 254 nm. Quantification of catalpol by HPLC.