CBS 97, 6-7 (2006). HPTLC of absinthe (a beverage of the wormwood plant, Artemisia absinthium) on silica gel with acetone - acetic acid (98 %) - toluene - dichloromethane 1:1:3:5 over 70 mm. Detection by dipping in a solution of acetic anhydride - sulphuric acid - ethanol 1:1:10 followed by heating at 104 °C for 5 min. Quantitative determination by absorbance measurement at 554 nm. The hRf value of absinthin was 64 and selectivity regarding matrix was given. Linearity was between 0.1 and 10 g/L. The limit of detection and quantification for absinthin was 0.05 and 0.11 g/L, respectively. The precisions were better than 13.5 % (intraday) and 15.8 % (interday).

Analytical Chemistry - An Indian Journal 8(1), 77-81 (2009). An HPTLC method is reported for estimation of lupeol and beta-sitosterol in the whole plant powder of Asteracantha longifolia (Acanthaceae). The proposed method was also employed for estimation of beta-sitosterol in herbal formulation containing Asteracantha longifolia. Methanolic extracts of the sample were used for chromatography. HPTLC on silica gel with toluene - ethyl acetate - methanol 75:15:7. Derivatization with Liebermann-Burchard reagent. Densitometric quantification at 366 nm. The concentration of lupeol and beta-sitosterol was 0.162 mg/g and 0.045 mg/g, respectively in the whole plant, while the concentration of beta-sitosterol was 0.039-0.048 mg/g in the formulation. The method was suitable for the quality control of the herbal formulation.

Planta Med. 83(07), 661-671 (2017). Structural modifications of 9α- and 9β-hydroxyparthenolide (isolated from Anvillea radiata aerial parts) were performed either by Heck’s reaction (a palladium(II) acetate treatment in presence of triethylamine and iodoaryl in dimethylformamide), or by acylation (here, addition of aroyl chlorides and/or acetic anhydride in dichloromethane and pyridine). TLC for reaction monitoring of the 21 derivatives on silica gel with petroleum ether – ethyl acetate in various proportions (3:2; 1:4; 1:1). Detection under UV or under white light after spraying with 5 % phosphomolybdic acid in ethanol, followed by heating.

J. of Natural Products 50, 903-909 (1987). TLC study of the microbial transformation of the sesquiterpene lactone arteanuuin B. Chromatography on silica with ether - hexane 4:1. Visualization with anisaldehyde-sulfuric acid spray reagent.

Acta Pharm. Hungarica 58, 129-133 (1988). TLC of three sesquiterpene lactones on silica with petrol ether, petrol ether - ethanol 95:5 and petrol ether - ether 8:2.

Phytochemistry 28, 3081-3083 (1989).TLC of plucheicinin and 11,12,13-trinor-3,4-diepicuauhtemone on silica with chloroform - methanol 4:1.

Biochemical Systematics and Ecology 18, 251-252 (1990). TLC of a-allo-cryptopine and dictamnine (alkaloids), limonin, limonexic acid and calodendrolide (limonids) on silica with chloroform – methanol 3:1.

Comparison of trees unattacked and attacked by Dioryctria Lorneana. Biochemical Systematics and Ecology 23, 1-15 (1995). TLC of monoterpenes on silica with hexane - petrol ether 5:10. Detection with an acidified solution of KMnO4.