J. Planar Chromatogr. 21, 97-102 (2008). The flowing-eluent-wall (FEW) procedure is suitable for single and multi-channel OPLC separation by operational segmentation of a non-segmented absorbent bed. OPLC of PTH-amino acids with chloroform - ethyl acetate 9:1 and of glycerol, diethylene glycol, ethylene glycol, 1,4-butanediol, 1,2-propanediol, 1,3-butanediol, 2,3-butanediol, and 1,6-hexanediol on silica gel with dichloromethane - n-dibutyl ether - acetone - acetic acid - water 50:15:20:13:3. Detection by derivatization with chromium(VI) oxide reagent, followed by heating at 120 °C for 5 min. Densitometry at 540 nm.

Ind. J. Pharm. Sci. 69 (6), 841-844 (2007). HPTLC of artesunate in bulk and pharmaceutical formulations on silica gel aluminium foil with toluene - ethyl acetate - acetic acid 10:40:1. Detection by spraying with vanillin reagent (1 % vanillin and 5 % sulphuric acid in ethanol). The pink zone for artesunate was stable for more than a day. Quantitative determination by densitomety in absorbance mode at 520 nm. The hRf value for artesunate was 44. Linearity was between 100 and 600 ng/spot. Recovery (by standard addition) was 98.9 to - 99.9 % both from tablets and injections.

Indian Drugs 45 (3), 233-225 (2008). HPTLC of atisine in Aconitum heterophyllum on silica gel with toluene - ethyl acetate - diethylamine 7:2:1. Densitometric evaluation at 274 nm. Detection by spraying with Dragendorff reagent followed by spraying with 10 % sodium nitrate. Densitometric evaluation of reddish brown zones at 520 nm. Linearity of atisine was between 10 and 60 ng/spot.

J. Planar Chromatogr. 21, 43-47 (2008). TLC and polarimetry was used to investigate the tendency of L-alanine to undergo oscillatory in-vitro chiral inversion when dissolved in neutral, acidic, and basic solvents. The influences of temperature and sample mixing were investigated as well. It was confirmed that L-alanine undergoes chiral inversion. TLC of L-alanine on silica gel, prewashed with methanol - water 9:1, and impregnated twice with aqueous copper sulfate solution and L-proline in water - methanol 9:1. Development with 2-propanol - acetonitrile - water 6:2:3 at 22 °C. Detection by dipping in freshly prepared 0.2 % methanolic ninhydrin solution, followed by heating at 100-110 °C for 10 min. Quantitation by densitometry at 540 nm.

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.

Asian J. Chem. 20(7), 5409 - 5413 (2008). HPTLC of atomoxetine HCl on silica gel with acetonitrile - acetic acid 9:1. Quantitative determination by absorbance measurement at 269 nm. The method was linear in the range of 100-1000 µg/mL. The recovery was 99.8 %. The method was suitable for routine analysis of atomoxetine HCl in its pharmaceutical preparations.

J. AOAC Int. 91, 1210-1217 (2008). HPTLC of monocrotophos, quinalphos, triazophos, parathion-methyl, isophenphos-methyl, temephos, parathion, phoxim, and chlorpyrifos on silica gel with automated multiple development. HPTLC of phoxim and chlorpyrifos on silica gel with dichloromethane - hexane 1:1 in a twin-trough chamber. Quantitative determination by absorbance measurement at 254 nm.

Asian J. Chem. 20(6), 4940-4942 (2008). HPTLC of paracetamol and tramadol hydrochloride on silica gel with ethyl acetate - toluene - ammonia 60:40:1. Absorbance measurement at 254 nm. The method was linear in the range of 0.1-0.5 µg/mL and 0.9-4.5 µg/mL for tramadol and paracetamol respectively. The recovery was 98.4-99.9 % for both compounds. The method was suitable for routine analysis.