J. Planar Chromatogr. 20, 293-301 (2007). TLC of candesartan, eprosartan, losartan, telmisartan, and valsartan on silica gel, aluminum oxide, amino-, cyano-, and diol-phase in a horizontal chamber in sandwich technique. Diol-phases were developed with hexane - isopropanol - formic acid 40:60:1, cyano-phases with hexane - dioxane - formic acid 30:70:1. Detection and quantification at 254 nm.

Indian J. Pharm. Educ. Res. 41(3), 261 (2007). HPTLC of irbesartan on silica gel with toluene - ethyl acetate - acetic acid 70:30:2. Densitometric aevaluation at 305 nm. Linearity was between 500-6000 ng/zone. Limit of detection and quantification was 100 and 400 ng/zone, respectively. Recovery was more than 100 %. The degradation products as result of acid and alkali hydrolysis, oxidation, dry and wet heat treatment and photodegradation were well separated from tirbesartan.

59th Indian Pharmaceutical congress C-327, 303, (2007). HPTLC of 3-beta-23-24 -trihydroxy-olean-12-en-28-oic acid in Convolvulus pluricaulus on silica gel with n-hexane - ethyl acetate 7:4. Quantitative determination by densitometry at 226. The limit of detection and quantification was14.2 and 50 ng/zone, respectively. Recovery was 94.5 % - 97.2 %. The method was applied for analysis of herbal syrup and tablets.

J. Planar Chromatogr. 20, 451-456 (2007). HPTLC of levetiracetam and oxcarbazepine on silica gel, prewashed with methanol, with toluene - acetone - methanol 3:1:1 in a twin-trough chamber saturated for 20 min at 25 °C. Densitometric evaluation in absorbance mode at 200 and 261 nm.

J. Planar Chromatogr. 20, 73-74 (2007). HPTLC of hedychenone (a trimethyldecalin terpene) on silica gel with n-hexane - ethyl acetate 4:1 in a saturated twin-trough chamber. After development the plates were dried at 105 °C for 20 min. Densitometric evaluation in absorbance mode at 254 nm.

J. Planar Chromatogr. 21, 39-42 (2008). HPTLC of neutral lipids and ubiquinone on silica gel with petroleum ether - diethyl ether - acetic acid 80:20:1. Detection with phosphomolybdic acid reagent. Quantitative determination by densitometry at 610 nm. Specific detection reagents were used to confirm the identity of particular lipid classes. The studies confirmed the presence of free sterols, free fatty acids, methyl esters, hydrocarbons and ubiquinone, and triacylglycerols.

J. Food Comp. Anal. 21, 496-500 (2008). HPTLC of bergenin (1), catechin (2), and gallic acid (3) from Bergenia ciliata and Bergenia ligulata on silica gel with toluene - ethyl acetate - formic acid 4:6:1. Quantitative determination by absorbance measurement at 280 nm. The hRf values of (1), (2), and (3) were 29, 54, and 60, respectively. Selectivity regarding matrix was given. Linearity was between 160 and 800 ng/spot for (1), 160 and 480 ng/spot for (2), and 160 and 560 ng/spot for (3). The limits of detection and quantification were 120 and 160 ng for (1), 80 and 120 ng for (2), and 40 and 80 ng for (3), respectively. Recovery was 99.3 % for (1), 98.6 % for (2), and 99.2 % for (3). The intermediate/interday/intra-day precision (n=6) was 0.04 % and 0.07 % for (1), 0.07 % and 0.06 % for (2), and 0.02 % and 0.11 % for (3).

J. Pharm. Res. 6 (4), 233-235 (2007). HPTLC of ofloxacin and satranidazole on silica gel with n-butanol - ethanol 5:5 containing 4 % ammonia. Densitometric analysis at 320 nm. The hRf value of ofloxacin and satranidazole was 54 and 83 respectively. Linearity was between 200 and 1000 ng/spot for ofloxacin and between 300 and 1500 ng/spot for satranidazole. Recovery was 99.1 - 99.8 % for both compounds.