J. Chinese Trad. Patent Med. 30 (11), 1642-1646 (2008). TLC of Yinao pill extracts on silica gel with 1) toluene - ethyl acetate 9:1; 2) benzene - ethyl acetate 3:2; 3) toluene - ethyl acetate - formic acid 28:8:1. Detection 1) by spraying with 10 % phosphomolybdic acid in ethanol and heating at 105 ºC; 2) by spraying with 10 % sulfuric acid in ethanol and heating at 105 ºC.

CBS 102, 10-12 (2009). HPTLC of diterpene lactones (ginkgolides A, B, C, and bilobalide) in aqueous Ginkgo biloba leaf extracts on silica gel (impregnated by dipping into a 4 % solution of sodium acetate in methanol - water 3:2 for 5 s followed by drying at room temperature for 1 h) with toluene - acetone 7:3 with chamber saturation for 20 min. After twofold development over 60 mm the plate is heated at 150 °C for 1 h for detection of active compounds. Quantitative determination by absorbance measurement at 254 and 400 nm. The correlation coefficients of the calibration curves were = 0.9971 and relative standard deviations were = 2.0 %. Intraday precision was 1.1-1.2 %, interday precision 1.1-1.3 % and recovery 98.5-104.6 %. The average content in leaves was 0.078 (in % of dry weight) for ginkgolide A , 0.072 for ginkgolide B, 0.076 for ginkgolide C, 0.062 for bilobalide and 0.29 % for total diterpene lactones.

Comparison with results obtained by use of computational algorithms J. Planar Chromatogr. 22, 327-331 (2009) TLC of 27 novel imidazo[2,1-c][1,2,4]triazine derivatives together with 12 compounds with known literature log P values (as reference calibration data) on RP-18 with methanol - water binary mobile phases containing different proportions of methanol in horizontal chambers without chamber saturation. Detection under UV 254 nm. Using principal-component analysis the obtained results were compared with results from nine computational methods.

Chinese J. Pharm. Anal. 28 (7), 1071-1074 (2008). TLC of the alkaloids matrine, oxymatrine, sophocarpine, sophoridine, cytosinethe in seed extracts of Sophora moorcroftiana on silica gel with chloroform – methanol – ammonia 50:6:1. Detection under UV 254 nm. Comparison with reference standards showed that extracts contained matrine, oxymatrine, sophocarpine, sophoridine, and cytosine.

Phytochem. Anal. 20, 421-426 (2009). HPTLC of delta-9-tetrahydrocannabinol in the flowertops of Cannabis sativa on silica gel with chloroform with chamber saturation for 20 min. Quantitative determination by absorbance measurement at 206 nm. Derivatization by dipping in Fast Blue B solution for 5 s. The hRf value of delta-9-tetrahydrocannabinol was 47 and selectivity regarding matrix was given. Linearity was given between 50 and 500 ng/zone. The limit of quantification and detection was 50 and 10 ng/zone, respectively. The intra- and inter-day repeatability (%RSD, n = 9) were not higher than 5.0 %. Recovery was 85.8 % for delta-9-tetrahydrocannabinol in decarboxylated Cannabis samples. The method was shown to be comparable within a small degree of error (0.5 %) to results from a validated HPLC method.

Chinese J. Hosp. Pharm. 29 (4), 1246-1247 (2009). TLC of TCM drug extracts on silica gel with 1) chloroform - methanol - acetone 10:1:1; 2) toluene - chloroform - acetone - methanol - formic acid 4:6:8:1:4; 3) chloroform - methanol 4:1. Detection 1) after exposure to ammonia vapor under UV 254 nm; 2) under UV 254 nm; 3) by spraying with 10 % sulfuric acid in ethanol followed by heating at 105 °C until coloration.

Bio. Chromatogr. 21(10), 1064-1068 (2008). Indirect chiral TLC separation of penicillamine (3,3-dimethylcysteine) enantiomers after derivatization with Marfey's reagent (FDNP-Ala-NH2) and two of its structural variants, FDNP-Phe-NH2 and FDNP-Val-NH2 on silica gel and RP-18 with phenol - water 3:1 and solvent combinations of acetonitrile and triethylamine phosphate buffer. The methods were applied for determination of the enantiomeric impurity of l-penicillamine, d-penicillamine, and pharmaceutical formulations of d-penicillamine.

J. Liq. Chromatogr. Relat. Technol. 33, 880-893 (2010). TLC of 6 carboxamide fungicides and 11 phenylbenzamide derivatives on silica gel and aluminium oxide impregnated by overnight predevelopment in n-hexane - paraffin oil 19:1 with mixtures of methanol - water, acetonitrile - water, tetrahydrofurane - water, and acetone - water with the concentration of organic modifier varying in steps of 5 %. Detection under UV light. The RMO and b values related to the molecular lipophilicity and to the specific hydrophobic surface area (b) of the solutes were calculated separately for each RP-TLC system and for each analyte. The correlations between the physicochemical parameters measured were calculated by linear regression analysis.