J. Chromatogr. Sci. 46 (4), 320-324 (2008). HPTLC of jasmonic acid (extracted from Lasiodiplodia theobromae with ethyl acetate) on silica gel with isopropanol - ammonia - water 10:1:1. Quantification by densitometry at 295 nm in absorbance mode. The limit of detection and quantification was 1 µg and 80 µg, respectively. The method is useful for high sample throughput, e.g. for routine analysis of jasmonic acid in perfumery industries.

J. of Pharm. Biomed. Anal. 44 (3), 812-817 (2007). HPTLC of extracts of Notopterygium incisum Ting ex H.T. Chang (or Notopterygium forbesii Boiss) root and rhizome, and marker compounds isoimperatorin, notopterol and bergapten. The authentication of rhizoma et radix Notopterygii was achieved by comparing the colors and Rf values of the bands in TLC fingerprints with those of the marker compounds. The HPLC fingerprints of 16 batches of herbal samples from different regions of China showed similar chromatographic patterns. Five peaks were selected as characteristic peaks, and three of these were identified by using LC-MS-MS techniques.

J. Chromatogr. Sci. 46 (10), 907-911 (2008). Examination of M(DEDTC)2 (M = Cu, Co, or Ni) and M(PyDTC)2 (M = Cu or Co) complexes prepared by reactions of sodium diethyldithiocarbamate (NaDEDTC) and ammonium pyrrolidinedithiocarbamate (NH4PyDTC) with metal (II) nitrates. Qualitative analysis and separation using TLC systems in the literature. Reexamination and discussion of the already known separation behaviour of the mentioned metal cations and their complexes in the context of relation to the crystal field theory (CFT) and TLC. Based on the chromatographic data it was found that CFT is closely related to the TLC separation of these metal cations and their complexes. This study is useful in understanding the linkage between the CFT of coordination chemistry and the chromatographic parameters, e.g., hRf value and theoretical plate numbers of the complexes.

J. Liq. Chromatogr. Relat. Technol. 31, 1881-1891 (2008). HPTLC of various neutral lipid classes on silica gel (prewashed with dichloromethane - methanol 1:1) with petroleum ether - diethyl ether - acetic acid 80:20:1 in a twin trough chamber saturated for 20 min. Detection by spraying with 5 % ethanolic phosphomolybdic acid solution and heating for 10 min at 110 °C. Quantitative determination by absorbance measurement at 610 nm.

60th Indian Pharmaceutical Congress PA-49, (2008). HPTLC of alfuzosin hydrochloride on silica gel with toluene - methanol - triethyl amine 15:5:1. Densitometric evaluation at 245 nm. Linearity was in the range of 5-400 ng/spot. The method was stability indicating (acid, alkali, oxidation, dry and wet heat and photodegradation). The compound was stable to oxidation and alkaline degradation. The hRf value of the main zone was 63, and of additional zones 10 and 33. The method could effectively separate the main drug from the degradation products.

J. Pharm. Res. 6(4), 205-207 (2007). HPTLC of itraconazole on silica gel with toluene - acetone - triethylamine 30:30:1. Quantitative determination by absorbance measurement at 270 nm. The hRf value of itraconazole was 62. Linearity was between 200 and 600 ng. The percent drug estimated from the market formulation was found to be 99.6 and 100.2 by peak height and peak area respectively. The percent recovery of the drug (by standard addition method) was between 99.4 and 100.3.

Chromatographia 69 (1-2), 157-161 (2009). TLC of amlodipine besylate (AML) and valsartan (VAL) on silica gel with toluene - methanol - acetic acid 70:30:1. Quantification by absorbance measurement at 244 nm. Linearity was between 100 - 600 ng/spot for AML and 1600 - 9600 ng/spot for VAL. For AML the RSD of intra-day precision was 1.5 - 1.8 % and of inter-day precision 1.2 - 2.0 %. For VAL the RSD of intra-day precision was 0.1 - 0.4 % and of inter-day precision 0.2 - 0.5 %. Accuracy was 98.3 % for AML and 98.7 % for VAL.

Asian J. Chem. 19(7), 5582-5586 (2007). HPTLC of telmisartan and hydrochlorothiazide on silica gel with ethyl acetate - chloroform - methanol 10:3:1. Absorbance measurement at 270 nm. The method was linear in the range of 500-750 ng/µL and 1600-2400 µg/µL for hydrochlorothiazide and telmisartan respectively. The recovery was 99.4-99.6 % for both compounds.