J. Planar Chromatogr. 12, 152-154 (1999). HPTLC of nimesulide (4'-nitro-2'-phenoxymethanesulfonanilide) on silica gel with toluene - methanol 4:1. Densitometry at 324 nm. Limit of detection was found to be 0.26 ng/µl. New simple, precise, accurate, rapid and stability-indicating determination.

J. Planar Chromatogr. 12, 230-323 (1999). HPTLC of magnesium salicylate and salicylic acid on silica gel with ethyl acetate - acetic acid 19:1. Quantitation after drying by linear densitometry at 252 nm.

J. Planar Chromatogr. 12, 392-394 (1999). TLC of seven intermediates from all steps of the syntheses of oxazepam on silica gel. After cleaning the plate by successive development with chloroform - ethyl acetate 3:1 and aqueous NH3 - methanol 1:9, chromatography with chloroform - acetone and chloroform - ethyl acetate mixtures in different ratios in previously saturated N-chambers. The optimum chromatographic system for related compounds was found to be chloroform - ethyl acetate 3:1. Detection under UV 254nm.

J. Planar Chromatogr. 13, 468-470 (2000). HPTLC of alprazolam, chlordiazepoxide, diazepam, lorazepam, nitrazepam, oxazepam on silica gel with chloroform - acetone 4:1. Detection under UV 254 nm. Visualization by spraying with 1% sulfuric acid and heating at 100°C for 10 min. After cooling, the plate was sprayed with 10% ammonium chloride solution and then, after 5 min, diazotized with sodium nitrite reagent and treated with N-(1-naphthylethylenediamine) in ethanol. Intense violet spots were immediately observed for ClDz, Nz, and Oz. Simple, rapid procedure.

Indian Drugs 39 (2), 91-95 (2002). HPTLC of catechin on silica gel with chloroform - ethanol - ethyl acetate - toluene - formic acid 6:2:4:1:1. Quantification by densitometry at 280 nm. The method was applied to catechu extracts from black tea, green tea, pale and black catechu.

J. Planar Chromatogr. 15, 192-195 (2002). HPTLC of rosiglitazone (and pioglitazone as internal standard) on silica gel after prewashing with methanol with ethyl acetate - toluene - methanol 45:55:1 after equilibration for 10 min. Densitometry at 242 nm. Limit of detection was found to be 40 ng; limit of quantitation 100 ng. New simple, specific, and sensitive method.

J. Planar Chromatogr. 15, 345-348 (2002). HPTLC of enoxacin, ofloxacin, and pefloxacin on silica gel in with dichloromethane - methanol - 25% NH3 14:10:3. Detection and quantification by videodensitometry at 254 nm and by classical densitometry at 263 nm for enoxacin, 290 nm for ofloxacin, and 275 nm for pefloxacin. Precision, expressed as RSD, was between 7.56 and 10.08.

J. Planar Chromatogr. 16, 19-22 (2003). TLC of fluoxetine [N-methyl-3-(4-trifluoromethylphenoxy)-3-phenyl-propylamine]and paroxetine [(-)-trans-5-[(4-p-fluorophenyl-3-piperidyl)methoxy]-1,3-benzodioxol]on silica gel with benzene - acetone - ethanol - NH3 9:7:2:1. Detection of fluoxetine by densitometry at 218 nm and of paroxetine at 293 nm. Video densitometry at 254 nm for both drugs. The range of linearity was 2-10 µg/spot for fluoxetine and 0.5-8 µg/spot paroxetine. RSD was less than 4.3% for densitometry and less than 4.9% for videodensitometry. New, simple, rapid, and accurate methods.