J. Planar Chromatogr. 26, 86-92 (2013). HPTLC of carteolol on silica gel with chloroform - methanol 5:1. Quantitative determination by absorbance measurement at 254 nm. The hRf of carteolol was 31. Linearity was in the range of 200-1200 ng/zone. LOD and LOQ were 34 ng/zone and 104 ng/zone, respectively. Intermediate precision was below 2 %. The method could effectively separate the drug from its degradation products.

Chinese J. of Lishizhen Trad. Med. & Pharm. 23 (1), 176-178 (2012). Jiannao Bushen Pills are a traditional Chinese compound preparation effective for brain-strengthening, tonifying kidney, replenishing Qi to invigorate the spleen, relieve uneasiness of mind and body tranquilization. TLC on silica gel 1) for Angelica sinensis, with petroleum ether (60-90 ºC) – ethyl acetate 4:1, detection at UV 366 nm; 2) for Fructus Forsythiae, with petroleum ether (30-60 ºC) – methanol 20:1, detection by exposure to ammonia vapors for 15 min, then spraying with 10 % sulfuric acid in ethanol and heating at 105 °C, viewing under daylight; 3) for Cinnamomum cassia and cassia twig, with petroleum ether (60-90 ºC) – ethyl acetate17:3, detection by spraying with 0.4 % 2,4-dinitrophenylhydrazine in 12N hydrochloric acid and viewing under daylight; 4) for bighead atractylodes rhizome, with petroleum ether (60-90 ºC) – ethyl acetate 50:1, detection by spraying with 0.5 % p-dimethylaminobenzaldehyde in ethanol – sulfuric acid 5:1 and viewing under daylight; 5) for Radix Ginseng rubra, with chloroform – methanol – water 13:7:2, detection by spraying with 10 % sulfuric acid in ethanol and heating at 105 °C, viewing under daylight.

J. Planar Chromatogr. 25, 108-111 (2012). HPTLC of indole acetic acid (1), indole butyric acid (2), and absisic acid (3) in watermelon seeds exposed to heavy metals on silica gel with cyclohexane - methanol - 2-propanol 4:2:1 +1 drop ammonia. Quantitative determination by absorbance measurement at 230 nm. Limit of quantification was 10 ng/zone for (1) and (2) and 6 ng/zone for (3).

J. Liq. Chromatogr. Relat. Technol. 36, 618-627 (2013). HPTLC of metformin hydrochloride (1) and pioglitazone hydrochloride (2) in tablet on silica gel with butanol - 1,4-dioxane - glacial acetic acid 5:3:2. Quantitative determination by absorbance measurement at 226 nm. The hRf values of (1) and (2) were 36 and 73, respectively. Linearity was in the range of 2-20 µg/zone for (1) and 60-600 ng/zone for (2). LOD and LOQ were 630 and 1909 ng/zone for (1) and 9 and 26 ng/zone for (2). Intermediate precision was below 1.0 %. Average recovery (by standard addition) for (1) and (2) was 99.4 % and 98.5 %, respectively.

Chinese J. of Med. Guide 10 (34), 113-114 (2012). Zhitongfengshi pills are a herbal TCM for treating numbness of limbs and rheumatic pain. For quality conterol TLC on silica gel 1) for Fructus Gardeniae, with ethyl acetate – acetone – formic acid – water 20:14:4:1, detection by spraying with 13 % sulfuric acid in ethanol and heating mildly, viewing in daylight; 2) for Cortex Phellodendri Chinensis,with n-butanol – formic acid – water 75:16:9, detection under UV 366 nm; 3) for Radix Scutellariae, with ethyl acetate – acetone – acetic acid – water 12:6:4:3, detection by spraying with 1.5 % ferric chloride in ethanol and viewing in daylight; 4) for Radix Clematidis, with toluene - ethyl acetate – glacial acetic acid 100:15:1, detection by spraying with 15 % sulfuric acid in ethanol and heating mildly, viewing in daylight.

J. of Qilu Med. & Pharm. 31 (4), 574-576 (2012). Fufang Jugeng Mahuangjian Tangjiang syrup ll is a herbal TCM preparation for treating cough caused by asthmatic bronchitis. For quality control and to guarantee the safty and effectiveness of the medicine, TLC on silica gel 1) for ephedrine hydrochloride, with n-butanol – formic acid – water 4:1:5, detection by spraying with 0.2 % ninhydrin in acetone and heating at 105 °C, viewing in daylight; 2) for Platycodon grandiflorus, with chloroform – diethyl ether 1:1, detection by spraying with 10 % sulfuric acid in ethanol and heating at 105 °C, viewing in daylight.

J. Planar Chromatogr. 26, 299-305 (2013). The review described the main reasons that transformed standard TLC into a reliable and regulatory acceptable technique. Different aspects that allowed the incorporation of quantitative TLC to the QA systems such as automation, standardization of analytical procedures and operational qualification and performance qualification, as well as development of digital technology and new instruments are discussed.

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).