Chinese J. Trad. Patent Med. (Zhongchengyao) 26 (6), 452-455 (2004). TLC of Shangbiao oil extracts on silica gel with 1) n-heptane-ethyl acetate 17:3; 2) n-heptane - ethyl acetate 9:1; 3). Detection 1) by spraying with 2,4-dinitro-phenylhydrazine solution in ethanol; 2) by spraying with 5 % vanillin-H2SO4 solution and heating at 110 ºC for 5 min. Identification by fingerprint techniques. Quantification of menthol and camphor by GC.

Chinese J. Trad. Pat. Med. (Zhongchengyao) 26 (8), 631-634 (2004). TLC on silica gel with 1) n-hexane - ethyl acetate 9:1; 2) chloroform - diethyl ether 1:1; 3) n-butanol - ethyl acetate - water 4:1:5. Detection by 1) exposing to iodine vapors; 2) spraying with 10 % H2SO4 in ethanol and heating at 105 ºC. Identification by fingerprint technique. Quantification of astragaloside by densitometry at 530 nm. Validation of the procedure by investigation of linearity (1.1 - 5.5 µg per spot), precision (RSD = 1.82 %, n = 5 within plate and 1.99 %, n = 5 plate to plate), repeatability by standard addition recovery (100.1 %, RSD = 1.59, n = 6), etc. The results are given for a group of real samples.

J. Planar Chromatogr. 18, 147-150 (2005). HPTLC of acteoside from leaves of Plantago lanceolata on silica gel with ethyl acetate - formic acid - water 18:1:1. Quantitative determination by densitometry at 334 nm. Intra-day and inter-day RSD were 0.58 and 2.0 %, respectively. Instrumental precision and repeatability of the method (CV) were found to be 0.62 and 1.5 %, respectively. The average recovery was 102.3 %.

J. Planar Chromatogr. 18, 234-239 (2005). TLC of Evolvulus alsinoides extracts and the marker EA 1, i.e. 3beta,23,24-trihydroxyolean-12-en-28-oic acid, on silica gel with n-hexane - ethyl acetate 7:3 in a saturated chamber. The marker EA 1 was detected under UV light at 366 nm as a yellow fluorescent band of Rf 0.8. Quantitative determination by absorbance measurement at 232 nm (=UV max of EA 1). Limit of detection 11.6 ng; satisfactory recovery from 93.3 to 96.6 %. The marker was isolated from the aerial parts of Evolvulus alsinoides by preparative TLC.

J. AOAC Int. 88, 1571-1577 (2005). TLC and HPTLC of narceine, morphine, codeine, thebaine, papaverine, and narcotine on silica gel with toluene - acetone - ethanol - 25% ammonia 20:20:3:1. Detection with Dragendorff’s reagent with sodium nitrite, densitometric evaluation at 520 nm. For UV-detection, Naturstoff reagent A (diphenylboric acid 2-amino ethyl ester) was used; quantitation by densitometry at 310 nm.

Planta Med. 70, 458-464 (2004). Preparative TLC of 6’-O-palmitoyltubeimoside I, a triterpenoid of the 8-formyldammarene type, the acetyl derivative of 7beta,20,26-trihydroxy-(2OS)-dammar-24E-en-3-O-alpha-L-arabinopyranosy-(1-2)-beta-D-glucopyranoside and the acetyl derivative of 7beta,18,20,26-tetrahydroxy-(2OS)-dammar-24E-en-3-O-alpha-L-arabinopyranosy-(1-2)-beta-D-glucopyranoside on silica gel with chloroform - methanol - water 13:7:2 and 13:4:1. Detection by spraying with 10 % sulfuric acid in ethanol, followed by heating.

Planta Med. 71, 470-475 (2005). Analytical and preparative TLC of three new alkaloids, 7,8-dehydro-1-methoxyrutaecarpine, isodecerine and 8-demethyloxychelerythrine together with 16 known compounds on silica gel with n-hexane - ethyl acetate 5:3, chloroform - ethyl acetate 25:1, and chloroform - methanol 25:1. Detection under UV light at 254 nm.

J. Liq. Chrom. & Rel. Technol. 27, 2421-2439 (2004). TLC of e. g. delta8-tetrahydrocannabinol, cannabigerol, cannabigerolic acid, cannabidiolic acid, and (-)-delta9-(trans)-tetrahydrocannabinolic acid on RP18 with methanol - 5 % acetic acid 19:1. Detection under UV light at 254 nm and by spraying with modified anisaldehyde - sulfuric acid spray reagent. For selective detection of cannabinoids, the plate was sprayed with 0.5 % fast blue B salt in water, followed by 0.1 M NaOH.