J. Agric. Food Chem. 49, 5785-5789 (2001). TLC of bistheaflavin A, theanaphthoquinone, theaflavin on silica gel with benzene - ethyl formate - formic acid 1:7:1 or chloroform - methanol - water 14:6:1. Detection under UV and by spraying with 2% ethanolic iron(III)chloride solution or 10% sulfuric acid reagent, followed by heating.

Acta Chromatographica 14, 110-114 (2004). TLC of external flavonoid aglycones on silica gel with toluene - dioxane - acetic acid 95:25:4 for Veronica exudates, and toluene - acetic acid 2:1 for Artemisia exudates. Detection by spraying with “Naturstoffreagenz A” reagent. Documentation of apigenin and quercetin under UV 366 nm by digital camera. Quantitative determination by comparison with the peak areas of the standards. Evaluation of suitability of the method for routine assays with large number of samples.

J. Planar Chromatogr. 19, 371-377 (2006). HPTLC of five isoflavone products and 2-phenylchromone as reference standard on silica gel, pre-washed with acetonitrile, in an unsaturated chamber, twice with chloroform or dichloromethane. Determination by absorbance measurement at 280 nm. Preparative layer chromatography on silica gel. A new device for isolation of sythesis products in sub-milligram amounts was successfully employed.

International Journal of ChemTech Research 1(4), 1079-1086 (2009). TLC of wedelolactone, quercetin, and jatamansone in a polyherbal formulation. The formulation (oil) was extracted with methanol, the supernatant was concentrated under vacuum and used for chromatographic analysis. TLC on silica gel with toluene - acetone - formic acid 11:6:1 for wedelolactone, toluene - ethyl acetate - methanol 44:50:6 for quercetin and petroleum ether - acetone 3:1 for jatamansone. The hRf value of jatamansone was 34, of wedelolactone 56, and of quercetin 47. Densitometric evaluation at 254 nm, 285 nm and 366 nm for quercetin, jatamansone, and wedelolactone respecticely. The method was linear in the range of 500-2500 ng/band for wedelolactone, 3000-8000 ng/band for quercetin and 2000-6000 ng/band for jatamansone. The polyherbal oil formulation contained 1.62 %, 0.24 % and 0.11 % of wedelolactone, quercetin, and jatamansone respectively.

J. Planar Chromatogr. 28, 54-60 (2015). HPTLC of bergenin in the aerial parts of Flueggea virosa on silica gel with dichloromethane – methanol 17:3. Quantitative determination by absorbance measurement at 220 nm. The hRF value of bergenin was 29. Linearity was between 100 and 800 ng/zone. The intermediate intra-day and inter-day precisions were below 2 % (n=6). The LOD and LOQ for bergenin were 18 and 53 ng/zone, respectively. Recoveries were in the range of 99-100 %.

J. Planar Chromatogr. 29, 336-340 (2016). HPTLC of isoalantolactone (1), germacranolide (2), β-sitosterol (3), and lupeol (4) in the roots of Inula cappa on silica gel with toluene ‒ methanol 47:3. Detection by dipping into anisaldehyde reagent followed by heating at 105 ºC until colored bands appeared. Quantitative determination by absorbance measurement at 525 nm. Linearity ranged from 10-70 μg/mL for (1), 10-60 μg/mL for (2), 8-48 μg/mL for (3) and 15-90 μg/mL for (4). The intermediate precisions were below 0.9 % (n=7). The LODs and LOQs were 5 and 10 μg/mL for (1), (2) and (4) and 2 and 6 μg/mL for (3). Average recoveries were between 98.3 and 99.0 % for (1) to (4).

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. Chromatogr. 351, 379-382 (1986). TLC of plant extracts containing the xanthone-C-glycoside mangiferin on silica with ethyl acetate - formic acid - water 67:13:20. Densitometric determination at 366 nm. Also TLC of colladin and colladonin with benzene - MEK - formic acid 9:1:1. Comparison with HPLC. Method suitable for the quantitative determination of other xanthone glycosides and coumarins in plant extracts.