obtained by different techniques. J. Planar Chromatogr. 23, 320-322 (2010). HPTLC of thymol in Satureja hortensis L. extracts on silica gel with toluene - ethyl acetate 93:7. Detection by spraying with anisaldehyde reagent. Quantitative determination by absorbance measurement at 513 nm. The quantity of thymol extracted depends on the composition of the extraction solvent and the extraction technique. The best results were obtained by maceration with ethanol.

Acta Chromatographica 22 (3), 481-489 (2010). HPTLC on silica gel with toluene – ethyl acetate – methanol – formic acid 8:10:5:2. The hRf values were 22, 19, and 81 for sennosides A and B and kaempferol, respectively. Quantification by densitometry at 270 nm. The recovery of sennosides A and B and kaempferol from Cassia fistula extract were 98.0, 98.7, and 99.1 %, respectively. The linearity was in the range of 100–400 ng/band. Instrument precision was in the range of 1.03-1.33 % and method precision in the range of 1.3-1.8 %.

J. Strait Pharm. 22(11), 90-92 (2010). TLC of components of Yinhu granules: 1) for Artemisia capillaris Thunb. on polyamide phase with acetic acid; 2) for Radix Notoginseng on silica gel with chloroform – methanol – water 13:7:2. Detection 1) under UV 366 nm; 2) by spraying with 10 % sulfuric acid in ethanol and heating at 105 ºC until the zones were visualized.

J. Ethnopharmacol. 137, 1337-1344 (2011). HPTLC of phyllanthin (A) and gallic acid (B) in the whole plant of Phyllanthus simplex on silica gel with hexane - ethyl acetate 5:1 for (A) and ethyl acetate - formic acid 44:3 for (B). Detection by spraying with anisaldehyde - sulfuric acid reagent. Quantitative determination by absorbance measurement at 260 and 520 nm. The hRf values of (A) and (B) were 19 and 82, respectively. The amount found in samples was 14.5 % for (A) and 0.7 % for (B).

J. Planar Chromatogr. 23, 348-352 (2010). TLC of methoxylated flavones G1, G2, G3, G4 (3’,4’,5’-trimethoxyflavone), and G5 on alumina with n-hexane - ethyl acetate 7:3 at ambient temperature with chamber saturation. Detection by visual inspection at 365 nm. The hRf values of G1 (monomethoxyflavone), G2 (monomethoxyflavone), G3, G4 (trimethoxyflavone), and G5 (dimethoxyflavone) were 42, 30, 22, 17, and 12, respectively.

J. Planar Chromatogr. 24, 264-267 (2011). TLC of crebanine on silica gel with toluene - ethyl acetate - methanol 14:3:3 in a twin-trough chamber saturated for 1 h at 25 +/- 2 °C. Detection under UV light at 254 nm. Quantitative determination by densitometry in absorbance mode at 286 nm. The method precision (%RSD, n = 3) and the instrument precision (%RSD, n = 6) were 0.9 and 0.5 %, respectively. The repeatability (%RSD, n = 5) was 0.8; the accuracy as average recovery was 100.1 %. The limit of detection and quantification was 10 and 15 ng/zone, respectively. Linearity was between 100-500 ng/zone. The hRf value was 54.

International Journal of Pharmacy and Pharmaceutical Sciences 3(2), 85-89 (2011). TLC of andrographolide on silica gel with toluene - ethyl acetate - formic acid 10:9:1. Densitometric evaluation at 235 nm before derivatization. Evaluation of the fingerprint profile at 254 nm and after derivatization at 366 nm by spraying with anisaldehyde-sulfuric acid reagent followed by heating at 110 °C.

J. of Fujian Univ. of TCM 21(4), 38-40 (2011). TLC of Radix Serratulae Chinensis extracts on silica gel with chloroform - methanol 4:1. Detection under UV 254 nm. Identification of ecdysterone by comparison with the standard (hRf 42). The method was suitable for simple and reproducible quality control of Radix Serratulae Chinensis.