Chinese J. Modern Appl. Pharm. 25 (1), 66-69 (2008). TLC of Qufu Zhuanggu capsule extracts on silica gel with 1) n-hexane - ethyl acetate 4:1; 2) benzene - ethyl acetate 9:1; 3) chloroform - methanol 19:1; 4) cyclohexane - ethyl acetate 5:2; 5) n-hexane - acetone 3:1. Detection 1) under UV 365 nm; 2) by spraying with 10 % sulfuric acid in ethanol and heating at 105 ºC until the spot were visualized; 3) by treatment with ammonia vapors for 10 min; 4) by spraying with 20 % HClO4 in ethanol. Identification by comparison of the chromatograms with those of the standard psoralen.

J. Planar Chromatogr. 22, 395-398 (2009). HPTLC of coenzyme Q10, cholesterol and biological extracts on silica gel with petroleum ether - diethyl ether - acetic acid 85:15:1. Detection by dipping into 5 % phosphomolybdic acid in ethanol for 10 s followed by heating for 10 min at 110 °C. Quantitative evaluation in visible light.

J. AOAC Int. 92, 725-729 (2009). HPTLC of acrylamide extracted from coffee samples on silica gel with ethyl acetate - tert. butyl methyl ether 4:1 in a twin trough chamber or automatic developing chamber. Pre-chromatographic in situ derivatization of the extracts (applied as area) by overspraying with dansulfinic acid produced the fluorescent dansylpropanamide band. Quantitative determination by fluorescence measurement at 254/>400 nm. The limit of quantification was 48 µg/kg. The linearity over the whole procedure showed determination coefficients between 0.9995 and 0.9825 (n = 6). The within-run precision (%RSD, n = 6) of the chromatographic method was 3%. Commercial coffee samples analyzed showed acrylamide contents between 52 and 191 µg/kg, which was in correlation with amounts reported in publications.

60th Indian Pharmaceutical Congress PG-260 (2008). HPTLC of glycyrrhizic acid on silica gel with chloroform - glacial acetic acid - methanol - water 15:8:3:2. Quantitative determination by absorbance measurement at 254 nm. The hRf value of glycyrrhizic acid was 28. The method was linear in the range of 50-500 ng/spot. The sample analyzed by the proposed method contained 87.8 µg glycyrrhizic acid per tablet, equivalent to 0.015 % w/w of the tablet formulation.

J. Planar Chromatogr. 22, 445-448 (2009). HPTLC of myristicin, safrole and extract of seeds on silica gel, prewashed with methanol, with toluene in an automatic developing chamber saturated for 20 min. Quantitative determination by absorbance measurement at 210 nm for myristicin and at 290 nm for safrole.

Chinese J. Hospit. Pharm. 29 (8), 686-688 (2009). TLC of the extracts of Yixuean pills on silica gel with 1) chloroform - ethyl acetate - acetone - formic acid 60:25:25:4; 2) n-hexane - chloroform - methanol 15:5:2; 3) ethyl acetate - formic acid - acetic acid - water 15:1:1:2. Detection 1) under UV 254 nm; 2) by exposure to iodine vapor and under UV 254 nm; 3) by spraying with 10 % sulfuric acid in ethanol followed by heating at 105 °C until coloration evaluation under visible light and UV 254 nm.

60th Indian Pharmaceutical Congress PA-211 (2008). HPTLC of triamcinalone acetonide on silica gel aluminum foil with toluene - ethyl acetate - ammonia 33:67:1 %.The hRf value of triamcinalone acetonide was 38. Quantitative determination by absorbance measurement at 240 nm. The method was linear in the range of 100-2000 ng/spot; recovery was 99.5 %. The stability indicating method has been successfully applied to forced degradation studies of triamcinalone acetonide (acid, alkali, hydrogen peroxide, photo degradation thermal and neutral hydrolysis) and resolved degradation products and excipients from triamcinalone acetonide.

Abstract No. F-284, 61st IPC (2009). HPTLC of diclofenac sodium and thiocolchicoside on silica gel with toluene - ethyl acetate - methanol 5:3:2. The hRf value was 17 and 53 for thiocolchicoside and diclofenac sodium, respectively. Quantitative determination by absorbance measurement at 285 nm. The method was linear in the range of 50-300 ng/band for both drugs. Recovery was 100.5-101.1 %.