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.

J. Sep. Sci. 26, 1698-1700 (2003). HPTLC of levofloxacin and lamotrigine (internal standard) on silica gel with water – methanol – n-butanol 1:1:1 and 1 drop of ammonia. Quantitative determination by absorbance measurement at 298 nm. Linearity of determination of levofloxacin is between 0.8 and 3.0 µg and its average percentage recovery is 99.9 %.

J. AOAC Int. 90, 405-413 (2007). TLC of acediasulfone, cinchocaine and cefuroxime on silica gel with butanol - methanol - tetrahydrofurane - concentrated ammonium hydroxide 10:10:10:1 with chamber saturation. Detection under UV at 254 nm. Quantitative determination by absorbance measurement at 262 nm.

Pharmazie 61, 747-750 (2006). TLC of phenazopyridine and 4 major metabolites (i. a. p-methoxyaniline) on silica gel with chloroform - methanol mixtures. Also irradiation of phenazopyridine adsorbed on silica gel. The drug was dissolved in methanol and mixed with aqueous slurry of silica gel. TLC plates were prepared and wet plate photolyzed as such with a mercury lamp. The plate appeared as yellow chromatogram, which turned dark yellow within 15 min. The progress of reaction was monitored by Co-TLC of a withdrawn scratch with the starting drug.