Abstract No. F-311, 61st IPC (2009). HPTLC of levocetirizine dihydrochloride and montelukast sodium on silica gel with chloroform - methanol 93:7. The hRf value was 21 and 65 for levocetrizine and montelukast, respectively. Quantitative determination by absorbance measurement at 345 nm. The method was linear in the range of 100-350 ng/band for levocetrizine and 600-1100 ng/band for montelukast.

J. Planar Chromatogr. 22, 449-451 (2009). TLC of zolpidem and zoplicone on silica gel with methanol - triethylamine 39:1, acetonitrile - triethylamine 39:1, chloroform - methanol - triethylamine 38:2:1, and acetonitrile - methanol - triethylamine 34:4:1 with chamber saturation. Detection by spraying with chloranilic acid reagent (0.5 chloranilic acid in dioxane) and evaluation of colored zones in daylight.

J. Planar Chromatogr. 22, 273-276 (2009). HPTLC of bicalutamide and leflunomide (as internal standard) on silica gel with toluene - ethyl acetate 4:5 in a twin trough chamber saturated for 30 min at room temperature. Quantitative determination by absorbance measurement at 273 nm. The limit of detection and quantification was 50 and 200 ng/band, respectively.

Appl. Surf. Sci. 256, 6489-6494 (2010). TLC of naproxen released from a SBA-15 mesoporous silica drug delivery system on silica gel with benzene - tetrachloromethane - acetic acid 7:1:1. Quantitative determination by absorbance measurement at 260 nm at different time intervals. The hRf value of naproxen was 50.

International Seminar on Herbal Drug Research, PN-017 (2009). HPTLC of thiocolchicoside and diclofenac sodium on silica gel with toluene - acetone - methanol - formic acid 500:200:200:1. Quantitative determination by absorbance measurement at 280 nm. The method was linear in the range of 160-800 ng/band (thiocolchicoside) and 1000-5000 ng/band (diclofenac sodium). The recovery was in the range of 99.2-100.9 for both compounds.

J. Planar Chromatogr. 23, 298-303 (2010). TLC of oxaprozin on silica gel with n-hexane - chloroform - glacial acetic acid 4:1:1 with chamber saturation for 15 min at room temperature. The hRf value of oxaprozin was 56. Quantitative determination by absorbance measurement at 286 nm. The limit of detection and quantification was 16 and 40 µg/mL, respectively. Linearity was between 33 and 433 µg/mL. The recovery was between 98.9 and 101.6 % at different spiking levels. Intra-day precision (%RSD) at different concentration levels was 0.86-1.03 % and inter-day precision 0.99-1.15 %. Oxaprozin was subjected to stress tests (acidic and alkaline hydrolysis) and the method was able to separate the degradation products from the main compound.

J. Planar Chromatogr. 24, 232-235 (2011). HPTLC of darunavir ethanolate in tablets on silica gel, prewashed with methanol, with toluene - ethyl acetate - methanol 7:2:1 in a twin-trough chamber lined with filter paper and saturated with mobile phase for 30 min at room temperature (25 +/- 2 °C). Quantitative determination by densitometry in absorbance mode at 267 nm. The hRf of darunavir ethanolate was 47. Linearity was between 250 and 1750 ng/band with r = 0.9994. The limits of detection and quantification were 15 and 46 ng/band, respectively. The intra-day and inter-day precision was (%RSD, n = 6) between 0.5-0.9 % and 1.1-1.3 %. Recovery (n = 6) was 99.3-101.2 %.

J. AOAC Int. 93, 811-819 (2010). HPTLC of olanzapine on silica gel (prewashed twice with methanol) with methanol - ethyl acetate 4:1 in a twin-trough chamber saturated for 20 min at 25 +/- 2 °C. Quantitative determination by densitometry in absorbance mode at 285 nm. The hRf was 35. Linearity was between 100 and 600 ng/band for olanzapine. LOD was 24 ng/band and LOQ 91 ng/band. The average recovery (n = 6) was 100.4 %. The %RSD of intra-day and inter-day precision (n = 5) was between 0.2-1.4 %.