Chinese Trad. Patent Med. (Zhong Chengyao) 17, 1-2. (1995). TLC of the extracts of title drug on silica with 1) chloroform - methanol 40:1, 2) cyclohexane - ethyl acetate 5:1. Detection by spraying with 5 % phosphomolybdic acid in ethanol, or with 5% vanillin in sulfuric acid and heating. Quantification of the main components by densitometry at 254 nm.

J. Planar Chromatogr. 8, 284 - 287 (1995). Development of a fluorimetric HPTLC method for the quantitative determination of rape seed oil in fermentation broth. After extraction of the oil from the broth, samples and standards are sprayed automatically as bands on to the plate. Separation takes four minutes and, after derivatization and scanning, a polynomial function is used for quantification. The coefficient of variation (n = 6) is 1%. - HPTLC of rape seed oil (commercial product) on silica with petrol ether - ether 5:1; derivatization by dipping into a mixture of water-methanol-70% perchloric acid 80:20:3 followed by heating for 8 min at 120 °C. Quantification by densitometry (fluorescence) at 366 nm.

J. Planar Chromatogr. 9, 220-223 (1996). HPTLC of 18b-glycyrrhetinic acid on silica with ethyl acetate - methanol - 13.5M NH3 10:3:1. Quantification by densitometry at 260 nm (absorbance). New highly selective and rapid HPTLC method.

J. Chin. Trad. Med. (Zhongguo Zhongyao Zazhi) 20, 226-227 (1995). TLC on silica with the upper phase of butanol - ethyl acetate - water 4:1:5. Detection by spraying with 10 % sulfuric acid in ethanol and heating at 105 °C for 5 min. Identification of the two drugs by comparison.

(Camomile. Mechanism of the antiphlogistic affect of camomile extracts and plant material.) Deutsche Apotheker Zeitung 136, 17-30 (1996). TLC of apigenin, apigenin-7-gucoside, bisabololoxid A and B on silica with ethyl acetate, ethyl acetate - ethanol 19:1, dichloromethane and cyclohexane - ethyl acetate 10:1.

J. Chinese Trad. Patent Med. (Zhongchengyao) 18 (5), 23 (1996). TLC on silica with the upper phase of butanol - acetic acid - water 4:1:%. Detection by spraying with 2 % vanillin in ethanol containing 0.5% sulfuric acid and heating at 120°C. Discussion of the distribution of the compounds in the drug.

GIT Laboratory Journal 1, 40-41 (1997). HPTLC of various herbal drugs on silica: 1) Hypericin with ethyl acetate - formic acid - water 20:2:1; derivatization by immersion in 1% ethanolic aluminium chloride; quantification by densitometry at 436/>560 nm. 2) Arbutin with ethyl acetate - methanol - water 100:17:14; derivatization by immersion in molybdatophosphoric acid reagent followed by heating at 100°C for 5-10 min; quantification by densitometry at 600 nm. 3) Syringin with chloroform - methanol - water 65:25:2; derivatization by immersion in anisaldehyde sulfuric acid reagent followed by heating at 110°C for 5-10 min; quantification by densitometry at 600 nm. 4) Aloin with ethyl acetate - formic acid - water 17:2:3; quantification by densitometry at 350 nm. 5) Carvone with chloroform - acetone 50:1; derivatization by immersion in anisaldehyde sulfuric acid reagent followed by heating at 80-110°C for 5-10 min; quantification by densitometry at 410 nm. 6) Thujone with dichloromethane - ethyl acetate - acetone 95:3:2; derivatization by immersion in anisaldehyde sulfuric acid reagent followed by heating at 80-110°C for 5-10 min; quantification by densitometry at 600 nm. 7) Asarone/isoasarone with chloroform - hexane 7:3; quantification by densitometry at 300 nm. 8) Caffeine with toluene - acetone 4:1; quantification by densitometry at 275 nm. 9) Caffeic acid with tolulene - ethyl acetate - formic acid 2:1:1 (upper phase); quantification by densitometry at 366/>400 nm. See also Sz. Nyiredy, R.E. Kaiser, A. Studer (Eds.): Instrumental Planar Chromatography, Res. Inst. for Med. Plants, Budakal·sz (1997) 195-200.

Chinese J. Pharm. Ind. (Zhongguo Yiyao Gongye Zazhi) 28, 263-265 (1997). TLC on silica with petrol ether - ethyl acetate - acetic acid 82:13:5. Quantification after elution by UV spectrometry at 227 nm. Recovery 99.61 ± 0.74% (n=4)