J. Planar Chromatogr. 6, 153-160 (1993). HPTLC on cellulose with 13 mobile phases of gradually increasing eluent strength; three runs with each eluent. Detection under UV 254 nm or by spraying with aqueous potassium permanganate solution (0.001 M), 0.01% methanolic bromocresol green solution, Dragendorff’s reagent, 0.01 M aqueous silver nitrate solution.

Indian Drugs 31 (5), 211-214 (1994). TLC of different analgesics on silica (1mm thick) with ethyl acetate - chloroform - methanol - water 75:15:5:3:2. Quantification after elution with methanol - 1N HCl 99:1 by spectrophotometry at 242 nm (paracetamol), 258 nm (dextropropoxyphene HCl) and 620 nm (dicyclomine HCl) after derivatization with cobalt chloride reagent.

J. Planar Chromatogr. 8, 47-51 (1995). TLC of 10 barbituric acid derivatives on DTMA impregnated silica with mixtures of water and methanol. Visualization under UV 254 nm. Densitometry at 254 nm.

J. AOAC Int. 79, 656-659 (1996). TLC of antifungal agents (alone or combined with other drugs) in various pharmacopoeial or proprietary creams and ointments after extraction on silica with n-hexane - chloroform - methanol - diethylamine 50:40:10:1 as mobile phase. Visualization under UV 254 nm; quantification by densitometry at 220 nm. Recoveries 100.2 %.

(Hungarian). Magyar Kémiai Folyoirat 102, 343-355 (1995). TLC of heterocondensed quinazdones on silica with benzene - methanol 4:1. Detection under UV 254 nm.

J. Planar Chromatogr. 10, 460-463 (1997). HPTLC of chlorpheniramine maleate, methscopolamine nitrate, pseudoephedrine hydrochloride, brompheniramine maleate, phenylpropanolamine hydrochloride, and guaifenesin on silica. PE, CM, and BM were developed to a distance of ca. 6 cm with 1-butanol - deionized water - acetic acid 7:2:1; plates containing PP were developed to a distance of ca. 6 cm with ethyl acetate - methanol - conc. NH3 17:2:1. All developments were performed at 20°C and 60% relative humidity with chamber saturation. Quantification by densitometry at 277 nm for PE, at 264 nm for CM, at 265 nm for BM, and at 209 nm for PP. It has been demonstrated that the new HPTLC method achieved recoveries as a percentage of tablet label values, standard deviations for replicate analyses and recoveries of spiked samples that compare very favorably with data reported on the HPLC analyses of drugs. Advantages of the method: Internal standards are not required, high sample throughput, very low solvent usage per sample, accuracy and precision are more than satisfactory for performing pharmaceutical analysis with validation according to GLP and GMP recommendations.

J. Planar Chromatogr. 11, 201-204 (1998). TLC of betamethasone valerate and clotrimazole on silica gel with chloroform - acetone - acetic acid 34:4:3. Quantitation by densitometry in absorbance-reflectance mode at 228 nm. The method has been found suitable for the routine analysis of cream and products of similar composition in pharmaceutical industry quality control laboratories.

J. AOAC Int. 82, 825-829 (1999). HPTLC of sulpiride, 2-aminomethyl-1-ethylpyrrolidine (impurity A) and methyl-5-sulphamoyl-2-methoxybenzoate (impurity B) on silica gel with dichloromethane - methanol - 25 % NH3 45:7:1. Densitometry in absorbance/reflectance mode at 240 nm for sulpiride and impurity B; after spraying with ninhydrin solution, heating at 80°C for 10 min scanning of impurity A was done at 240 nm and 500 nm. Simple, accurate, reproducible and quick TLC procedure.