J. Planar Chromatogr. 20, 53-56 (2007). HPTLC of flavonoids (quercetin glucuronide, hyperoside, isoquercitrin, quercetin galloyl galactoside, quercitrin) on silica gel with ethyl acetate - formic acid - water 136:5:6 in a horizontal chamber. Densitometric quantitfication of flavonoids at 350 nm.

J. Planar Chromatogr. 20, 121-125 (2007). TLC of salidroside, rosavin, rosarin, and rosin on silica gel with ethyl acetate - methanol - water 77:13:10. UV detection was performed at 215 nm for salidroside and at 245 nm for rosavin. For visualization the plates were also sprayed with vanillin - phosphoric acid reagent.

J. Planar Chromatogr. 20, 73-74 (2007). HPTLC of hedychenone (a trimethyldecalin terpene) on silica gel with n-hexane - ethyl acetate 4:1 in a saturated twin-trough chamber. After development the plates were dried at 105 °C for 20 min. Densitometric evaluation in absorbance mode at 254 nm.

J. Planar Chromatogr. 21, 21-26 (2008). HPTLC of extracts of Hoodia gordonii with fructose and beta-sitosterol as standards on silica gel with chloroform - methanol - water 70:30:3 in an automatic developing chamber fitted with a twin-trough chamber. The chamber was saturated for 20 min with mobile phase and relative humidity was controlled (33 %). Detection by dipping in anisaldehyde reagent, followed by heating at 100 °C for 3 min. Documentation and evaluation before derivatization under UV 366 nm and after derivatization under white light. The method was validated. It is specific and allows discrimination of Hoodia gordonii from Hoodia currorii, Hoodia parviflora, and the common adulterant prickly pear cactus (Opuntia ficus-indica). The sample is stable in solution and on the plate for at least 3 h, as well as during chromatography (2D test). After derivatization the chromatogram is stable for at least 1 hour. Precision (repeatability, intermediate precision, and reproducibility was good and the method is robust . The method is sensitive to changes in relative humidity. If relative humidity exceeds 47% the plate must be conditioned to 33% RH to ensure proper separation.

J. Chinese Trad. Patent Med. 30 (12), 1781-1785 (2008). TLC of Shenyi granule extracts on silica gel with 1) dichloromethane - ethyl acetate - petroleum ether (60-90 ºC) - methanol 20:14:6:1; 2) ethyl acetate - formic acid - glacial acetic acid - water 30:3:4:3; 3) toluene - ethyl acetate - formic acid 8:6:1; 4) chloroform - methanol - water 26:10:3. Detection 1) by spraying with 10 % sulfuric acid in ethanol and heating; 2) by spraying with iron(III) chloride solution; 3) by spraying with vanillin reagent. Identification by comparison with the standards glycyrrhizic acid and glycyrrhetinic acid.

Chinese J. Modern Appl. Pharm. 25 (1), 66-69 (2008). TLC of Qufu Zhuanggu capsule extracts on silica gel with 1) n-hexane - ethyl acetate 4:1; 2) benzene - ethyl acetate 9:1; 3) chloroform - methanol 19:1; 4) cyclohexane - ethyl acetate 5:2; 5) n-hexane - acetone 3:1. Detection 1) under UV 365 nm; 2) by spraying with 10 % sulfuric acid in ethanol and heating at 105 ºC until the spot were visualized; 3) by treatment with ammonia vapors for 10 min; 4) by spraying with 20 % HClO4 in ethanol. Identification by comparison of the chromatograms with those of the standard psoralen.

60th Indian Pharmaceutical Congress PG-251 (2008). HPTLC of glycyrrhetinic acid and piperine in haematinic herbomineral capsule formulation on silica gel with toluene - ethyl acetate - glacial acetic acid 25:15:1. Quantitative determination by absorbance measurement at UV 254 nm. The method was linear in the range of 0.8-2.4 ng/spot (glycyrrhetinic acid) and 10-50 ng/spot (piperine). Recovery was 96.3-98.6 %.

J. Planar Chromatogr. 22, 377-380 (2009). HPTLC of stigmast-5-en-3beta-O-D-glucoside and bark extracts on silica gel with chloroform - methanol - water 33:7:4 in a saturated twin trough chamber. Detection by derivatization with anisaldehyde reagent followed by heating at 105 °C for 5 min. Quantitative determination by absorbance measurement at 515 nm.