J. Planar Chromatogr. 26, 62-66 (2013). HPTLC of propranolol hydrochloride (1) and flunarizine dihydrochloride (2) on silica gel with methanol - chloroform - toluene 6:14:14+1 drop glacial acetic acid. Quantitative determination by absorbance measurement at 260 nm. The hRf values of (1) and (2) were 35 and 64, respectively. Linearity was in the range of 3000-15000 ng/zone and 750-3700 ng/zone for (1) and (2), respectively. Intermediate precision was below 2 %.

by thin-layer chromatography) (Chinese). J. of Guizhou Normal Univ. (Natural Sci.) 30 (3), 1-3 (2012). Kalimeris indica (Linn.) Sch. is a perennial herb used in TCM preparations for treating cold fever, hepatitis, parotitis, pharyngitis, indigestion, etc. For quality control, TLC on silica gel with chloroform – methanol 9:1, detection by spraying with 5 % sulfuric acid in ethanol and heating at 105 °C, viewing in daylgiht. The standard was alpha-spinasteryl-3-O-ß-D-glucoside.

Chinese J. of Guiyang Med. Coll. 37 (6), 605-607 (2012). Gongyanping capsules are a herbal TCM for treating acute and chronic pelvic inflammatory disease, irregular menstruation, etc. For quality control, TLC on silica gel 1) for Melastoma dodecandrum Lour. and the standard gallic acid, with chloroform – ethyl acetate – formic acid 25:20:4, detection by spraying with 2 % ferric chloride in ethanol and heating mildly, viewing in daylight; 2) for Zanthoxylum nitidum, with n-butanol – glacial acetic acid – water 7:1:2, detection by spraying with 5 % potassium iodobismuthate in water – hydrochloric acid 200:1 and viewing in daylight; 3) for Radix Angelicae Sinensis and the standard ferulic acid, with toluene – chloroform – glacial acetic acid 6:5:1, detection under UV 366 nm; 4) for Ficus simplicissima Lour. and the standard psoralen, with cyclohexane – toluene – ethyl acetate 10:10:3, detection by spraying with 10 % KOH in ethanol and viewing under UV 366 nm.

J. Planar Chromatogr. 25, 133-137 (2012). HPTLC of thiocolchicoside (1) and aceclofenac (2) in combined dosage form on silica gel with methanol - chloroform - water 48:1:1. Quantitative determination by absorbance measurement at 254 nm. The hRf values of (1) and (2) were found to be 70 and 83, respectively. Linearity was in the range of 30-180 ng/band for (1) and 750-4500 ng/band for (2). Recovery was in the range of 98.7-101.2 % for both.

J. of Anhui Coll. of Trad. Chinese Med. 32 (6), 80-82 (2012). Shisanwei Hezhong pills are a herbal TCM formulation for regulating the spleen and stomach and for treating epigastric pain. For quality control, TLC on silica gel 1) for Rhizoma Corydalis and the standard tetrahydropalmatine, with n-hexane – chloroform – methanol 15:8:2, detection by exposing to iodine vapors and viewing in daylight and under UV 366 nm; 2) for White Paeony Root and the standard paeoniflorin, with chloroform – ethyl acetate – methanol – formic acid 200:25:50:1, detection by spraying with 5 % vanillin in sulfuric acid – ethanol 1:10 and heating at 105 °C, viewing in daylight; 3) for Pericarpium Citri Reticulatae and the standard hesperidin, with ethyl acetate – methanol - water 100:17:13, detection by spraying with 2 % aluminium chloride and viewing under UV 366 nm. Quantification of naringin by HPLC.

J. Planar Chromatogr. 26, 386-394 (2013). Review of the role of TLC chambers in planar chromatography, and the merits of S-chambers in terms of reproducibility and higher peak resolution, allowing to implement 30 % faster separation and 20-30 % higher efficiency compared with unsaturated N-chamber.

J. Liq. Chromatogr. Relat. Technol. 37, 528-537 (2014). HPTLC of prednisolone acetate (1) and moxifloxacin hydrochloride (2) in pharmaceuticals on RP-18 with methanol - water 7:3 + 1 drop triethylamine. Quantitative determination by absorbance measurement at 274 nm. The hRf values for (1) and (2) were 50 and 72, respectively. Linearity was in the range of 600-3600 ng/zone for (1) and 300-1800 ng/zone for (2). LOD and LOQ were 57 and 173 ng/zone for (1) and 27 and 83 ng/zone for (2). Recoveries (by standard addition) were in the range of 100-102 % for (1) and (2). Intermediate intra- and inter-day precision was below 2 % (n=3).

J. of China Pharm. 22 (9), 14-16 (2013). Sanyu Xugu Tie plaster is a herbal TCM preparation for the treatment of traumatic injury, contusion, stasis of blood and innominate toxic swelling. For quality control, TLC on silica gel 1) for Radix Cynanchi paniculati and the standard 2'-hydroxy-4'-methoxyacetopheone, with cyclohexane – ethyl acetate 3:1, detection by spraying with 5 % ferric chloride in ethanol and heating until the zones are visible in daylight; 2) for Oleum eucalypti and the standard cineole, with cyclohexane – ethyl acetate 19:1, detection by spraying with 1 % vanillin in sulfuric acid – ethanol 1:4 and heating at 105 °C until the zones are visible in daylight; 3) for Herba sarcandrae and the standard isofraxidin, with toluene – ethyl acetate – formic acid 9:4:1, detection under UV 366 nm; 4) for Kusnezoff monkshood root and the standard acetylbenzoylaconine, with cyclohexane – ethyl acetate diethylamine 12:8:1, detection by spraying with 5 % potassium iodobismuthate in water – hydrochloric acid 200:1 and viewing in daylight.