J. Liq. Chromatogr. Relat. Technol. 31, 2429-2441 (2008). TLC of citalopram, sertraline, fluoxetine, and fluvoxamine on silica gel with acetone - benzene - 25 % ammonia 10:9:1 in a twin-trough chamber saturated for 15 min. Detection under UV 254 nm. The hRf value was 28 for fluoxetine, 44 for citalopram, 56 for fluvoxamine, and 68 for sertraline (with a standard deviation less than 0.02 % in all cases). Quantitative determination by absorbance measurement at 240 nm. The calibration curve was linear in the range of 500-5000 ng/spot for all analyzed compounds; correlation coefficients were found to be more than 0.998 for all drugs (except the 0.991 for fluvoxamine). LOD was 40 ng/spot for citalopram and 50 ng/spot for fluoxetine, fluvoxamine, and sertraline, respectively. LOQ was found to be 130 and 160 ng/spot for citalopram and fluoxetine, respectively. Intra-assay precision (% RSD) was within the range of 0.52-0.87 % and 1.34-1.84 % for citalopram and fluoxetine, respectively, inter-day precision for the analyses conducted on three consecutive days was below 1.8 % and 2.5 % for citalopram and fluoxetine, respectively. The recoveries (RSD) of citalopram ad fluoxetine were found to be in the range of 99.3-100.3% (0.8 %) and 99.4-100.4 % (1.9%), respectively.

Abstract No. C-497, 61st IPC (2009). HPTLC of ellagic acid in seeds of Eugenia jambolana Lam on silica gel with ethyl acetate - glacial acetic acid - formic acid - water 100:11:11:27. Densitometric evaluation at 254 nm. The method was linear in the range of 200-1200 ng/band. The alcoholic seed extract contained 11.03 % of ellagic acid and 21 % of total tannin (measured by chemical method).

Abstract No. C-291, 61st IPC (2009). Quantitative determination of curcumin in the marketed herbal product Rheumax (Herbajules rumatis) containing extracts of Curcuma longa, Boswellia serrata, Tinospora cordifolia and Vitex negundo by TLC on silica gel with chloroform - methanol 37:3. The hRf value of curcumin was 59. Quantitative absorbance measurement at 430 nm. The linear regression between 100 and 500 ng/zone showed R2 of 0.99984 and RSD of 1.58 % for curcumin.

J. Chromatogr. A 1217(1), 99-103 (2010). Discussion of the definition of multidimensional (MD) separations, especially some potentially powerful separation techniques such as comprehensive 2D LC (LC × LC), and comprehensive 2D GC (GC × GC). The definitions of MD separations have been extended by some researches beyond their intended scope. This disqualifies comprehensive 2D techniques as LC × LC, GC × GC and 2D TLC from being considered as 2D techniques. In other instances, extended treatment of the definition is used as a basis to justify design-parameters of comprehensive 2D separations despite the fact that these parameters lead to sub-optimal implementations. The review draws attention to the shortcomings in the definition, discusses the weaknesses in the currently used definitions, and proposes to define n-dimensional analysis as one that generates n-dimensional displacement information.

Chinese J. Food Sci. 29 (4), 291-295 (2008). HPTLC of celery extracts on silica gel with chloroform - methanol - water 360:46:7. Detection and identification of the flavonoids by the characteristic chemical reaction colors and the UV spectrum of the prepared samples. Quantitative determination of apigenin by absorbance measurement at 345 nm. The linearity was between 330 and 990 ng/zone. Precision ( % RSD) was 1.33 % (n = 5) and the recovery was 97.8 % (n = 5, RSD = 2.3 %).

Indian Drugs 47(3), 55-56 (2010). An HPTLC method is described for estimation of n-valeric acid in Valeriana officinalis (Valerianaceae). Methanolic extracts of the plant were subjected to chromatographic analysis on silica gel with toluene - ethyl acetate 3:1. Densitometric evaluation at 254 nm. The method was linear in the range of 500-1500 ng/band with a recovery between 98.4-104.1 %. The plant extract was found to contain 1.13 % of n-valeric acid.

Indian Drugs 47(11), 68-72 (2010). TLC on silica gel with ethyl acetate - acetic acid - water 15:3:2. The hRf value was 57. Densitometric evaluation at 265 nm. The method was linear in the range of 200-2400 ng/band. The method was suitable for routine quality control of the drug in formulation as there is no interference from excipients.

Analytical Chemistry - An Indian Journal 8(4), 608-612 (2009). An HPTLC method is reported for estimation of lupeol and beta-sitosterol from the whole plant of Vernonia cinerea (Acanthaceae). Methanolic extracts of the plant were subjected to chromatographic analysis on silica gel with toluene - methanol 220:3. Derivatization with Liebermann-Burchard reagent. Densitometric evaluation at 366 nm. The plant was found to contain 0.49 mg/g and 1.4 mg/g of lupeol and beta-sitosterol respectively. The method was suitable for quality control of herbal raw material.