J. Liq. Chromatogr. & Relat. Technol. 29, 2129-2139 (2006). TLC of fusidic acid on silica gel with n-hexane - ethyl acetate - glacial acetic acid 6:3:1. To detect the spots on chromatograms, densitometric measurements at three different wavelengths were carried out, i. e., 240 nm (FA), 260 nm (MHB, PHB), and 290 nm (BHA), leading to increased selectivity and decreased interferences of the peaks.

J. Liq. Chromatogr. Relat. Technol. 28, 1679-1691 (2005). HPTLC of the iridoid gycoside picroside I and picroside II on silica gel with chloroform - methanol 41:9 in a saturated twin-trough chamber. Quantitation by absorbance measurement at 290 nm.

J. Planar Chromatogr. 20, 127-130 (2007). TLC of isorhamnetin-3-glucoside, isorhamnetin-3-rutinoside, kaempferol-3-rhamnosidoglucoside, isoquercitrin, rutoside, hyperoside on silica gel in horizontal chamber with ethyl acetate - methyl ethyl ketone - formic acid - water 5:3:1:1 or ethyl acetate - formic acid - water 9:1:1. Quantitation by scanning at 366 nm; detection by spraying with a 1 % methanolic solution of Natural Product Reagent A followed by a 4 % methanolic solution of polyethylene glycol 400.

Food Res. Int. 40, 167-175 (2007). HPTLC of absinthin in absinthe beverage (from the wormwood plant Artemisia absinthium L.) on silica gel with acetone - acetic acid (98 %) – toluene – dichloromethane 1:1:3:5. Detection by dipping into a solution of acetic anhydride – sulphuric acid – ethanol 1:1:10, followed by heating for 5 min at 104 °C. 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 precision was better than 13.5 % (intraday) and 15.8 % (interday). The limit of detection and quantification for absinthin was 0.05 and 0.11 g/L, respectively.

Indian Drugs 44(10), 734 (2007). HPTLC of valdecoxib on silica gel with toluene - ethyl acetate 1:1. Quantitative evaluation by densitometry at 262 nm. Valdecoxib was well separated from rofecoxib. Linearity was between 800 and 1000 ng/zone. Recovery was 98.9 %.

Chromatographia 67 (1-2), 101-107 (2008). HPTLC of simvastatin and ezetimibe on silica gel with n-hexane – acetone 3:2. Quantification by densitometry in absorbance mode at 234 nm. The hRf value of simvastatin was 39 and of ezetimibe 50. Linearity was between 200 and 1600 ng/spot with correlation coefficients r2 = 0.9917 for simvastatin and r2 = 0.9927 for ezetimibe. Limits of detection and quantitation were 25 and 150 ng per band, respectively. For investigation of stability simvastatin and ezetimibe were subjected to acid, pH 6.8 phosphate buffer, oxidation, dry heat, and wet heat. The degradation products were well resolved from the pure drug, therefore the method could be effectively used for stability-indicating analysis.

59th Indian Pharmaceutical congress F-152, 426, (2007). HPTLC of rosiglitazone on silica gel aluminum layer with chloroform - ethyl acetate - ammonia 70:30:1. The hRf value of rosiglitazone was 40. Densitometric analysis in absorbance mode at 230 nm. Linearity was between 100 and 1000 ng/zone. Recovery (by standard addition method) was 99.6 %. Limit of detection and quantification was 10 ng and 50 ng/zone, respectively.

59th Indian Pharmaceutical congress F-224, 443, (2007). HPTLC of cilostazol on silica gel with ethyl acetate - toluene - methanol - ether 4:4:2:1. The hRf value was 64. Limit of detection and quantification was 7 ng/spot and 20 ng/spot respectively.