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.

Scholars Research Library 2(1), 489-494 (2010). HPTLC of montelukast sodium and levocetirizine dihydrochloride on silica gel with toluene - chloroform - methanol - glacial acetic acid 6:20:10:1 in a twin trough chamber with chamber saturation for 25 min. The hRf value of levocetirizine was 64 and of montelukast 89. Densitometric evaluation at 302 nm. The method was linear in the range of 200-3200 ng/band for montelukast and 400-1200 ng/band for levocetirizine. The recovery was 99.9-100.0 %.

International Journal of ChemTech Research 1(4), 1129-1135 (2009) The marker compound was first isolated by column chromatography over silica gel by elution with toluene - ethyl acetate 17:3. TLC of ethanolic extracts of Syzgium cumini seed on silica gel with toluene - ethyl acetate 17:3. The hRf value of the marker compound was 50. Densitometric evaluation in fluorescence mode at 366 nm. The method was linear in the range of 1-5 µg/band. The extract of the powdered sample contained 7.4 % of the marker compound.

International Journal of Pharma World Research 1(2) (2010). A validated stability indicating assay method is described for estimation of voglibose in bulk and dosage formulation. TLC on pre-washed silica gel plates with acetonitrile - methanol - 25 % ammonia 150:40:1. The hRf value of voglibose was 66. Densitometric evaluation at 284 nm. The method was linear in the range of 100-450 ng/band. The average recovery was 101.4 %.