Planta Med. 75, 1618-1624 (2009). TLC of gentiopicroside and methanolic plant extracts on silica gel containing 1 % CMC-Na with ethyl acetate - ethanol - water 20:2:1. Detection by spraying with 2 % vanillin-sulfuric acid reagent and by evaluation under UV 254 nm.

J. Planar Chromatogr. 24, 352-356 (2011). HPTLC of extracts of dried powdered rhizoms of A. galanga and three phenylpropanoids (1-acetoxychavicol acetate (1), acetoxyeugenol acetate (2), and trans-p-coumaryl diacetate(3)) on silica gel with n-hexane - ethyl acetate 4:1 with chamber saturation for 1 h. After drying second development with the same mobile phase. Quantitative determination by densitometry at the wavelength of maximum absorption. Linearity was between 0.6-1.8 µg/band, 0.4-1.5 µg/band and 0.1-0.3 µg/band for (1), (2), and (3), respectively. The LOD and LOQ was 150 and 500 ng/band for (1), 100 and 334 ng/band for (2), and 23 and 77 ng/band for (3). The repeatability of application and repeatability of measurement (%RSD, n = 6) was 0.9 and 0.5 % for (1), 0.5 and 0.3 % for (2), and 1.8 and 0.9 % for (3). The intra-day and inter-day precision was below 5 % for all compounds. The hRf value was 53, 37, and 43 for (1), (2), and (3), respectively.

J. Planar Chromatogr. 24, 253-256 (2011). HPTLC of yohimbine on silica gel, prewashed with methanol, with toluene - ethyl acetate - diethyl amine 7:2:1 in a twin trough chamber saturated with mobile phase for 10 min at 25 +/- 2 °C. Quantitative determination by densitometry in absorbance mode at 285 nm. Linearity was between 400 and 1200 ng/band. The hRf value was 39. The repeatability as system precision and method precision (n = 6) was 0.9 and 0.8 % CV. The limit of detection and quantification was 80 ng and 260 ng. The instrument precision (n = 6), intra-day and inter-day precision (n = 3, %RSD) were 0.2, 0.1, and 0.1 %, respectively.

J. Liq. Chromatogr. Relat. Technol. 34, 864-887 (2011). Comparison of a one dimensional TLC-MS separation and fingerprinting method with a two-dimensional TLC-LC-MS method, when applied to the analysis of phenolic acids and flavonoids from Salvia lavandulifolia. TLC directly or indirectly coupled with mass spectrometric detection proved very useful in the analysis of the phenolic acid and flavonoid fraction selectively extracted from botanical material.

Planta Med. 77, 548 (2011). HPTLC of forskolin and extracts from rhizomes of Coleus forskohlii on silica gel with toluene - methanol 12:1. The hRf value of forskolin was 27. Anisaldehyde-sulfuric acid reagent was used for spraying followed by heating of the plate at 105 °C for 5 min. Quantitative determination by densitometric scanning in absorbance mode at 545 nm.

J. Planar Chromatogr. 24, 72-76 (2011). HPTLC of sennoside A and B and gallic acid on silica gel with toluene - ethy acetate - formic acid - methanol 8:8:4:5. Quantitative analysis by densitometry at 270 nm. Linearity was between 114-427 ng/zone for sennosides A and B and 100-375 ng/zone for gallic acid. For sennosides A and B and gallic acid, hRf values were 26, 21 and 80, correlation coefficients were 0.95, 0.998, and 0.997, method precisions (%RSD, n = 6) were 1.1, 1.1 and 0.9 %, recoveries were 96.3-97.2 %, 98.1-100.8 % and 97.1-98.1 %, respectively. LOD andLOQ was 30 and 25 ng/zone for sennoside A, 20 and 99 ng/zone for sennoside B, and 66 and 82 ng/zone for gallic acid.

Planta Med. 77, 742-748 (2011). Preparative TLC of two monoterpenes, two sesquiterpenes, twenty-two flavonoids, fourteen lignans, and thirty-two other compounds on silica gel with petroleum ether - ethyl acetate 5:2 and 2:1 and chloroforrm - methanol 100:1, 10:1 and 20:1.

J. of China Pharm. 20 (9), 27-28 (2011). Chuangshang No 1 compound oral liquid is a herbal TCM effective specially for promoting blood circulation for removing blood stasis and relieving pain. TLC of the extracts of the medicine 1) for Angelica sinensis and Ligusticum wallichii on silica gel with n-hexane – ethyl acetate 9:1, detection by viewing under UV 366 nm; 2) for Stigma Croci on silica gel with ethyl acetate – methanol – water 200:33:27, detection by viewing under daylight; 3) for Radix Paeoniae rubrathe (unpeeled root of common peony) on silica gel with chloroform – ethyl acetate – methanol – formic acid 200:25:50:1, detection by spraying with 5 % vanillin in sulfuric acid – ethanol 4:1 and heating until the zones were visualised.