J. Planar Chromatogr. 22, 197-200 (2009). HPTLC of whithaferin A on silica gel with toluene - ethyl acetate - formic acid 5:5:1 in a twin trough chamber saturated for 20 min at 25 +/- 2 °C and 50 +/- 5 % relative humidity. Detection under UV light and by dipping into freshly prepared p-anisaldehyde reagent, followed by heating at 110 °C for 10 min. Quantitative determination by absorbance measurement at 200 nm. The limit of detection and quantification was 100 and 800 ng/zone, respectively. The high sample throughput is useful for routine analysis of the preparation in industrial quality control and regulatory laboratories.

J. Planar Chromatogr. 21, 271-275 (2008). HPTLC of capsaicin and its degradation products (after acidic and alkaline hydrolysis, oxidation and thermal degradation) on silica gel with toluene - ethyl acetate 3:2. Quantitative determination by absorbance measurement at 280 nm. The limit of detection and quantification was 10 and 60 ng/band, respectively.

J. Planar Chromatogr. 22, 363-366 (2009). HPTLC of 5-hydroxymethylfurfural in seven Turkish fruit wines and three Turkish vinegars on silca gel with toluene - ethyl acetate - 90 % formic acid 6:3:1 in a twin trough chamber saturated for 20 min. Quantitative determination by absorbance measurement at 286 nm. The limit of detection and quantification was 0.05 and 0.13 ng/mL, respectively.

Chinese J. Pharm. Anal. 27 (3), 412-413 (2007). TLC of dexamethasone acetate on silica gel with dichloromethane – methanol 9:1. Detection under UV 254 nm.

Ind. J. Pharma. Sci. 71(1), 98-100 (2009). HPTLC of artemisinin on silica gel with toluene - ethyl acetate with chamber saturation for 30 min. Quantitative determination by absorbance measurement at 520 nm. The method was linear over the range of 100-600 ng/band, recovery was in the range of 98.8-100.5 %.

J. AOAC Int. 92, 387-393 (2009). TLC of tenatoprazole - before and after acid and alkali hydrolysis, oxidation and photodegradation - on silica gel, prewashed with methanol and dried at 110 °C for 5 min, with toluene - ethyl acetate - methanol 6:4:1 in a twin trough chamber saturated with the mobile phase for 30 min at 25 °C. Quantitative determination by absorbance measurement at 306 nm. The limit of detection and limit of quantitation were 50 and 100 ng/spot, respectively.

J. Chinese Trad. & Herb. Drugs 40 (8), 1249-1252 (2009). TLC of extracts of the TCM drug on silica gel with 1) methanol - acetic acid - water 18:1:4; 2) petroleum ether (60-90 °C) - ethyl acetate 1:1; 3) toluene - ethyl acetate - methanol 5:5:3; 4) petroleum ether (60-90 °C) - ethyl acetate - formic acid 15:5:1. Detection 1) by spraying with potassium iodobismuthate reagent; 2) under UV 254 nm; 3) by spraying with 5 % AlCl3 in ethanol and evaluation under UV 365 nm.

J. Planar Chromatogr. 22, 385-387 (2009). Ultrathin-layer chromatography of quercetin, rutin, and quercetin-3-O-glucoside on monolithic silica gel (size 30 mm x 18 mm) with binary and tertiary mobile phases in a cylindrical glass chamber previously saturated for 1 min. The migration distance was 20 mm and development time was 2 min. The investigated mobile phases were ethyl acetate - n-hexane 1:4 and 3:7, tetrahydrofurane - hexane 2:3 and 3:2, tetrahydrofurane - methanol - hexane 3:3:4, and hexane - acetone - methyl ethyl ketone 3:3:4. The best separation was achieved with acetone - methyl ethyl ketone - hexane 3:4:3. Densitometric evaluation at 366 nm.