J. Planar Chromatogr. 17, 169-172 (2004). HPTLC of omeprazole and pantoprazole and their impurities omeprazole sulfone and N-methylpantoprazole on silica gel with chloroform - 2-propanol - 25 % ammonia - acetonitrile (108:12:3:40). Detection under UV light at 254 nm. Quantitation of omeprazole and omeprazole sulfone at 300 nm and of pantoprazole and N-methylpantoprazole at 295 nm in reflectance-absorbance mode. Regression coefficients (r > 0.998), recovery (90.7 - 120.0 %), and detection limits (0.025 - 0.05 %) were validated and found to be satisfactory.

IPC 56th 2004, Abstract No. GP-11. Stability indicating HPTLC determination of indapamide in tablets on silica gel with toluene - methanol 7:3. Quantitative determination by scanning at 246 nm. Optimization of experimental parameter such as band size, chamber saturation, and slit width. The method was linear in the range of 1.4 - 3.72 g, recovery was 100.01 %. The drug was subjected to stress conditions according to ICH guidelines, degradation products were separated from the pure drug. The method was validated for accuracy, precision, linearity, and specificity.

J. Planar Chromatogr. 18, 61-66 (2005). TLC of three antidiabetic agents (pioglitazone, rosiglitazone, and repaglinide) on silica gel RP-8 with buffer - organic modifier binary mobile phases of widely different compositon in horizontal chambers; visualization under UV light at 254 nm. Peak-purity tests by recording the in-situ spectra in the wavelength range of 200 to 400 nm.

J. Planar Chromatogr. 18, 308-313 (2005). HPTLC of beta-adrenergic-blocking agents (acebutolol, atenolol, betaxolol, bisoprolol, labetalol, metoprolol, oyprenolol, pindolol, propanolol, sotalol, timolol) on silica gel with chloroform - methanol - ammonia 75:35:1. Quantitative determination by absorbance measurement at 270 nm for atenolol, at 240 nm for acebutolol, at 289 nm for propanolol, and at 220 nm for bisoprolol. The limits of detection and determination ranged from 30 to 400 ng and recovery was from 97.1 to 102.2 %.

J. Planar Chromatogr. 18, 380-383 (2005). HPTLC of ethamsylate in tablets on silica gel (pre-washed with methanol) at 25 +/-2 °C with chloroform - methanol -acetic acid 10:5:1 in a pre-saturated twin-trough chamber. Quantitative determination by absorbance measurement at 300 nm. The validated calibration range was 500-2500 ng per spot (r = 0.997).

J. Pharm. Biomed. Anal 36, 617-620 (2004) HPTLC of caffeine in herbal products and energy drinks, on silica gel with ethyl acetate - methanol 17:3. Solid samples (capsules) were extracted with methanol, filtered and applied whereas liquid samples (coca cola) were applied after the effervescence has ceased. Quantitative determination by absorbance measurement at 275 nm. The developed method was validated for specificity, repeatability (CV < 5 %), recovery (98.90) and accurary (99.84). The levels of caffeine were 4.76-13.29 % and 0.011-0.032 % for the herbal products and the energy drinks resp.

J. Planar Chromatogr. 19, 223-227 (2006). HPTLC of leuprolide acetate (a synthetic nonapeptide analog) on silica gel after prewashing with chloroform - methanol 1:1 using five-step isocratic incremental multiple development with ethyl acetate - methanol - 25 % ammonia. Detection under UV light at 254 and 280 nm. Quantitation by reflectance scanning at 280 nm.

J. Planar Chromatogr. 19, 73-80 (2006). TLC of six atypical antipsychotic drugs (amisulpride, clozapine, olanzapine, quetiapine, risperidone, ziprasidone) on silica gel, amino, cyano, DIOL, and polyamide phases with mixtures of n-hexane and six polar modifiers (acetone, dioxane, diethylamine, ethanol, isopropanol, and tetrahydrofuran) in a horizontal DS chamber. After development the plates were inspected under UV light at 254 nm. Quantification by densitometry.