J. Planar Chromatogr. 27, 328-332 (2014). HPTLC of crude extracts of micro-algae Dunaliella bioculata, Phaeodactylum tricornutum, and Scenedesmus obliquus on silica gel with dichloromethane - methanol 95:5. Data analysis of pictures digitally acquired at UV 254 nm and UV 366 nm included baseline correction, chromatogram alignment, principal component analysis (PCA) de-noising and diffusion drift correction. The workflow allowed to obtain a peak list containing hRF values, intensities and areas for statistical analysis.

J. Planar Chromatogr. 27, 472-476 (2014). HPTLC of (1) genistein and (2) vitexin in seeds of Vigna mungo on silica gel with toluene – ethyl acetate – methanol – acetic acid – formic acid 6:14:2:1:1 after saturation with mobile phase for 25 min. Quantitative determination by absorbance measurement at 254 nm. The hRF values of (1) and (2) were 81 and 31, respectively. Linearities were in the range of 500-2500 ng/zone for (1) and (2). The intermediate precisions were below 8 % (n=6) for (1) and (2). The LOD and LOQ were 14 and 42 ng for (1) and 52 and 159 ng for (2), respectively. Recoveries for (1) and (2) were in the range of 96.1-97.1 and 95.7-97.6 %.

J. Planar Chromatogr. 27, 454-459 (2014). HPTLC of (1) asiatic acid, (2) asiaticoside and (3) madecassoside in whole plant of Centella asiatica on silica gel with toluene – ethyl acetate – formic acid 5:5:1 for (1) and n-butanol - ethyl acetate - water 4:1:5 for (2) and (3). Quantitative determination by absorbance measurement at 600 nm. The hRF values of (1) to (3) were 52, 48 and 45, respectively. Linearity was in the range of 100-1000 ng/zone for (1) to (3). The intermediate precision was below 2 % (n=3) for (1) to (3). The LOD and LOQ were 40 and 100 ng/zone, respectively, for (1) to (3). Recovery for (1) to (3) were between 97.1 and 101.2 %.

Chinese J. Food & Drug 16 (2), 116-119 (2014). Tibetan Wuwei Ganluyaoyu Tangsan powder is a TCM for the treatment of rheumatism, rheumatic arthritis, rheumatoid arthritis, gout, hemiplegia, skin diseases, women's postpartum disease, etc. For quality control, HPTLC on silica gel (1) for Ephedra sinica Stapf, (1R,2S)-(-)-ephedrine hydrochloride and pseudoephedrine hydrochloride with chloroform – methanol – concentrated ammonia 4:1:0.1, detection by spraying with 0.1 % ninhydrin in acetone and heating at 105 °C until the spots were visible; (2) for Rhododendron anthopogonoides Maxim. with petroleum ether (60-90 °C) – ethyl acetate 9:1, detection by spraying with 5 % vanillin in sulfuric acid – ethanol 1:4 and heating at 105 °C until the spots were visible; (3) for Juniperus formosana Hayata with dichloromethane – methanol – formic acid 5:0.7:0.5, detection at UV 366 nm after spraying with 3% aluminum trichloride in ethanol and heating at 105 °C; (4) for Artemisia sieversiana Ehrhart ex Willd. with cyclohexane – acetone 5:6, detection as before.

J. Planar Chromatogr. 28, 17-23 (2015). HPTLC of (1) cetrimonium chloride, (2) benzyl trimethylammonium chloride and (3) tetramethylammonium hydroxide on silica gel with n-butanol – 40 % aq. ethylene glycol – ethyl acetate 6:4:1. Detection by spraying with Dragendorff reagent. The hRF values of (1) to (3) were 62, 20 and 2, respectively. LODs of surfactants (1) to (3) were 1000, 100 and 800 ng/zone, respectively.

J. Liq. Chromatogr. Relat. Technol. 38, 1392-1406 (2015). HPTLC of Cordyceps sinensis and Ganoderma lucidum on silica gel with ethyl acetate - dichloromethane - formic acid - glacial acetic acid - methanol 10:10:1:1:2. Qualitative identification at UV 254 nm and UV 366 nm. Hyphenation of electronspray ionization/mass spectrometry with HPTLC facilitated fast and convenient profiling of the metabolites in the extracts. For the chemometric analysis, raw and column data matrices were constructed using hRF datasets.

J. Planar Chromatogr. 28, 157-161 (2015). HPTLC of neutral lipids (1) and polar lipids (2) on silica gel with petroleum ether - diethyl ether - glacial acetic acid 80:20:1 for (1) and with chloroform methanol - water 65:25:4 for (2). Detection with phosphomolybdic acid for (1) and cupric sulfate - phosphoric acid for (2). Quantitative determination by absorbance measurement at 610 nm for (1) and 370 nm for (2). The effects of both, high temperature and S. mansoni infection, had individual and combined deleterious effects on lipid metabolism of B. glabrata snails.

J. Planar Chromatogr. 28, 307-315 (2015). HPTLC of carbinoxamine (1), pholcodine (2) and ephedrine (3) in a pharmaceutical preparation on silica gel with chloroform - propanol - ammonia 60:40:1. Quantitative determination by absorbance measurement at UV 254 nm. The hRF values for (1) to (3) were 12, 30 and 42. Linearity was in the range of 0.5-9 ng/zone for (1), 1-10 ng/zone for (2) and 5-45 ng/zone for (3). LOD and LOQ were 0.1 and 0.4 ng/zone for (1), 0.2 and 0.6 ng/zone for (2) and 0.6 and 1.8 ng/zone for (3), respectively. Intra-day and inter-day precisions were below 2 % (n=3). Mean recoveries were around 101 % for (1) to (3). The HPTLC method was more simple, sensitive and economic than the HPLC method.