Anal. Sci. 22, 743-745 (2006). HPTLC of gatifloxacin and ornidazole on silica gel with n-butanol – methanol 8:1 and 1 drop ammonia with chamber saturation for 45 min. Quantitative determination by absorbance measurement at 302 nm. Linearity of determination of gatifloxacin is 100 – 500 ng and of ornidazole 250 – 1250 ng, with a correlation coefficient of more than 0.9850. The intra-day and inter-day coefficients of variation are found to be in the range of 0.68 - 2.58 % and 0.37 - 3.62%, respectively.

J. Liq. Chromatogr. & Relat. Technol. 30, 1437-1445 (2007). HPTLC of steryl esters, methyl esters, triacylglycerols, FFA, and free sterols on silica gel (prewashed by development with dichloromethane -methanol 1:1) with petroleum ether - diethyl ether - glacial acetic acid 80:20:1 in a saturated twin-trough chamber. Detection by spraying with 5 % ethanolic phosphomolybdic acid followed by heating at 150 °C for 110 min. Quantitative determination by absorbance measurement at 610 nm.

J. Chinese Trad. Patent Med. (Zhongchengyao), 29 (3), 386-389 (2007). TLC of Fengshi Gutong tincture on silica gel with 1) chloroform - methanol - ammonia 80:20:3; 2) n-hexane - ethyl acetate - 4:1; 3) benzene - ethyl acetate - methanol 6:4:1; 4) benzene - ethyl acetate - methanol - isopropanol - water 60:15:15:10:3. Detection 1) by spraying with reagent of FeCl3 - K3Fe(CN)6; 2) under UV 365 nm; 3) by spraying with 10 % H2SO4 in ethanol and heating at 105 °C.

J. Chinese Trad. Patent Med. (Zhongchengyao) 29 (3), suppl. 3-4 (2007). TLC of Liandan Xiaoyanpian tablet extracts on silica gel with 1) toluene - chloroform - acetone 4:4:1; and 2) chloroform - methanol - ammonia 36:4:1. Detection 1) by spraying with 10 % H2SO4 in ethanol and heating at 105 °C.

J. Planar Chromatogr. 20, 251-257 (2007). TLC with aqueous ammonia-organic modifier (acetonitrile, dioxane, acetone) mobile phases has been used to study the effect on retention of the chromatographic system and the physicochemical properties of twelve 2,4-dioxotetrahydro-1,3-thiazoles. Principal-component analysis and partial least-squares regression were used to determine the molecular properties with the greatest effect on retention for each modifier. Good correlation was obtained between experimental and calculated retention data. HPTLC on RP-18 without chamber saturation. Detection under UV 254 nm.

J. Pharm. Biomed Anal. 45(2), 337-340 (2007). HPTLC of oleanolic acid and ursolic acid on silica gel impregnated with 1 % iodine solution in chloroform after sample application. Development with petroleum ether - ethyl acetate – acetone 82:18:1. Detection by spraying with a solution of 10 % sulfuric acid in ethanol followed by heating at 120 °C for 3 min. Quantification by densitometry in absorbance mode at 530 nm.

59th Indian Pharmaceutical Congress F-95, 414, (2007). HPTLC of granisetron hydrochloride on silica gel aluminium plates with chloroform - methanol 4:1, with 0.1 mL of ammonia. The hRf value of granisetron hydrochloride was 42. Densitometry in absorbance mode at 301 nm. Linearity was between 400 and 1600 ng/zone. The limit of detection and quantification was 80 ng and 160 ng/zone, respectively. The drug was subjected to acid and alkali hydrolysis, oxidative and thermal degradation. The degration products were well separated from the main compound.

J. Planar Chromatogr. 20, 279-281 (2007). HPTLC of alpha-amyrin on silica gel with dichloromethane - toluene 19:1 in a twin-trough chamber saturated for 5 min. Visualization by spraying with anisaldehyde reagent and heating for 10 min at 105 °C. Quantitation by densitometry at 586 nm.