J. Planar Chromatogr. 20, 451-456 (2007). HPTLC of levetiracetam and oxcarbazepine on silica gel, prewashed with methanol, with toluene - acetone - methanol 3:1:1 in a twin-trough chamber saturated for 20 min at 25 °C. Densitometric evaluation in absorbance mode at 200 and 261 nm.

Ind. J. Pharm. Res. 6 (4), 205-207 (2007). HPTLC of itraconazole on silica gel with toluene - acetone - triethylamine 30:30:1. Detection at 270 nm. The hRf value of itraconazole was 62. Linearity was between 0.2 and 0.6 µg. The market formulation contained itraconazole amounts of 99.6 % via peak height and 100.2 via peak area, respectively. Recovery (by standard addition) was 99.4 % and 100.3 % respectively.

60th Indian Pharmaceutical Congress PA-205, (2008). HPTLC of diacerein on silica gel with ethyl acetate - n-hexane - acetic acid 120:19:1. The hRf value was 32. Quantitative determination by absorbance measurement at 258 nm. The method was linear in the range of 50-250 ng/spot. The recovery was 96-103 %.

Chem. 18(1), 667-672 (2006). HPTLC of mefenamic acid and drotaverine HCl in tablets on silica gel with methanol - toluene - triethylamine 10:75:2. Quantitative determination by absorbance measurement at 241 nm. The hRf values were 31 and 47 for mefenamic acid and drotaverine HCl, respectively. The method was validated in terms of accuracy, precision, specificity, ruggedness. Linearity was between 3800 and 8400 ng for mefenamic acid and 1200 and 2700 ng for drotaverine HCl. The recovery (by standard addition method) was in the range of 99.1-100.9 % for both compounds. The method could be used for routine analysis of these compounds and their combined dosage form.

Asian J. Chem. 19(4), 2955-2960 (2007). TLC of esomeprazole and domperidone on silica gel with chloroform - acetonitrile - ammonia 20:40:1. Quantitative determination by absorbance measurement at 222 nm. The hRf value was 76 for esomeprazole and 89 for domperidone. Linearity was between 600 and 1400 µg/mL for domperidone and 1200 and 2800 µg/mL for esomeprazole. Recovery (by standard addition method) was 99.6 %. The proposed method is precise, accurate and can be used for routine analysis of esomeprazole and domperidone in tablets.

J. Pharm. Res. (7)4, 229-232 (2008). HPTLC of lumefantrine and artemether on silica gel with toluene - ethyl acetate - formic acid 60:60:7. Quantitative determination by absorbance measurement of lumefantrine at 267 nm and of artemether at 561 nm. The hRf value for lumefantrine was 54 and of artemether 89. Linearity was in the range of 1200-6000 ng/spot for lumefantrine and 200-1000 ng/spot for artemether. The method was successfully applied to the analysis of commercial formulations.

J. Planar Chromatogr. 21, 283-287 (2008). HPTLC of tolnaftate on silica gel with toluene - chloroform 4:1 in a twin trough chamber saturated with mobile phase for 10 min at room temperature and at 60 +/- 5 % relative humidity. Quantitative determination by absorbance measurement at 248 nm.

60th Indian Phamraceutical Congress PA-222 (2008). HPTLC of paracetamol, aceclofenac and rabeprazole on silica gel with ethyl acetate - methanol - glacial acetic acid 90:10:1. Quantitative determination by absorbance measurement at 275 nm. Linearity was in the range of 100-500 µg/mL, 20-100 µg/mL and 2-10 µg/mL for paracetamol, aceclofenac and rabeprazole respectively. Recovery was in the range of 98.9-100.1 % for all three compounds.