J. Planar Chromatogr. 16, 390-395 (2003). TLC of 5 series of anticonvulsant active N-substituted amides of a-arylalkylamine-g-hydroxybutyric acid (37 compounds) on RP-18 with mixtures of methanol, 0.1 M tris buffer pH 7.4, and acetic acid with chamber saturation. Visualization under UV 254 nm. Rapid, easy, and convenient method for determination of lipophilicity.

CBS 86, 6 (2001). HPTLC of etoposide solution (in 5 % dextrose or 0.9% NaCl) on silica gel in horizontal development chamber in sandwich configuration with diethyl ether - dichloromethane - methanol 24:20:1. Quantitative determination by absorbance measurement at 290 nm.

J. Planar Chromatogr. 17, 137-142 (2004). TLC of naproxen in pharmaceutical preparations (Naprosyn, Apranax, Aleve, Naproxen) on silica gel with cyclohexane - chloroform - methanol 12:6:1. Quantitative determination at 223 nm. Limit of detection for naproxen is 30 ng. Recovery and repeatability were satisfactory.

Indian Drugs 41 (6), 362-365 (2004). HPTLC on silica gel with n-butane - n-propanol - glacial acetic acid - water - chloroform 4:1:1:1:2 with addition of formic acid in proportion of 1:0.001. Densitometric evaluation of ginkgo biloba extract by absorbance measurement at 254 nm. The same plate was used for the quantitative determination of ginseng at 520 nm after spraying with ninhydrin reagent. A simple, fast and precise HPTLC method has been developed for the simultaneous determination of ginkgo biloba and ginseng in solid dosage form.

IPC 56th 2004, Abstract No. G-5. HPTLC of conessine in Holarrhena antidysentrica, an important ayurvedic drug, on silica gel with toluene - ethyl acetate - diethyl amine 13:5:2. Detection by spraying with Dragendroff’s reagent. Quantitative determination by densitometric scanning at 520 nm. Different market samples of the drug were found to contain 0.30 - 1.46 % of conessine with recovery of 95.18 - 102.70 %

An improved analytical procedure. J. Planar Chromatogr. 17, 173-176 (2004). TLC of R,S-(+-)-ibuprofen and S-(+)-ibuprofen on silica gel prewashed with methanol - water 9:1 and impregnated with L-arginine by conventional dipping for 2 s in a 0.03 mol/L solution of the compound in methanol. One-dimensional development with acetonitrile - methanol - water 5:1:1 plus several drops of acetic acid to adjust the pH to 4.8, and two-dimensional chromatography with the same solvent mixture in two directions. Quantitation by densitometry at 210 nm.

Abstract G-9, IPC (2005). HPTLC of pantoprazole and mosapride in combined dosage form on silica gel with methanol - toluene - chloroform 4:30:15. Quantitative determination by absorbance measurement at 305 nm. The hRf value of pantoprazole was 31 and of mosapride 43, recovery was 99.9-101.1 %. Accuracy, precision, and linearity of the method were established.

J. Planar Chromatogr. 18, 384-387 (2005). TLC of thirty-seven N-[(4-arylpiperazin-1-yl)alkyl]-2-azaspiro[4.4]nonane- and [4.5]decane-1,3-dione derivatives on RP-18 in a pre-saturated chamber with n-propanol - Tris buffer (pH 7.0) mixtures. Detection under UV at 254 nm.