Ind. J. Pharm. Sci. 69 (6), 834-836 (2007). HPTLC of olmesartan medoxomil and hydrochlorothiazide on silica gel with acetonitrile - chloroform - acetic acid 14:4:1. Quantitative determination by absorbance measurement at 254 nm. The calibration curve was linear between 500 and 750 ng/spot for olmesartan medoxomil and between 100 and 600 ng/spot for hydrochlorothiazide. The limit of detection and quantification for olmesartan medoxomil was 170 and 500 ng/spot, and for hydrochlorothiazide 30 and 100 ng/spot. The proposed method can be successfully used to determine the drug content of marketed tablet formulation.

Biomed. Chromatogr. 10, 146-147 (1996). TLC on silica by developing twice with 1) ethyl acetate - isooctane - acetic acid 100:400:11, and 2) ethyl acetate - hexane 3:1. Detection by spraying with Triton X-100 - chloroform - petrol ether 1:9:30. Quantification by densitometry at 340 nm/> 540nm.

Ind. J. Pharm. Sci. 70(5), 644-647 (2008). HPTLC of meloxicam on silica gel with ethyl acetate - cyclohexane - glacial acetic acid 325:175:1 with chamber saturation for 45 min. Quantitative determination by absorbance measurement at 353 nm. The method was linear in the range of 100-500 ng/zone, recovery was 100.3 %. The method was evaluated for stability (acid, base, thermal, oxidative, photodegradation) and degradation products were well separated from the main drug.

Chinese J. Pharm. (Zhongguo Yaoxue Zazhi) 33, 165-167 (1998). TLC on silica gel with heptane - chloroform - ethanol - ethyl acetate 10:4:4:3. Quantitation by densitometry. Investigation and discussion of the linear ranges, precision and recoveries of each drug. Precision < 4.89% (n=5) within plate and < 5.23% (n=5) plate-to-plate. Recovery > 91.64 ± 9.16% (n=5).

Separation and analysis of duloxetine hydrochloride and olanzapine in a synthetic mixture. J. Planar Chromatogr. 22, 121-126 (2009). HPTLC of duloxetine hydrochloride (and degradation products after acidic and basic hydrolysis, oxidation and photodegradation) on silica gel with toluene - methanol - 10 % ammonia 60:26:1 in a twin trough chamber saturated at 25 °C. Quantitative determination by absorbance measurement at 231 nm. The hRf value was 39. Linearity was between 60-480 ng/band. The limit of detection and quantification was 20 and 60 ng/spot, respectively. For separation of duloxetine hydrochloride and olanzapine in a synthetic mixture HPTLC with acetone - methanol - triethylamine 10:6:1. Quantitative determination by absorbance measurement at 240 nm. The hRf values were 63 and 77, respectively. Linearity was between 100-800 ng/band.

Anal. Biochem. 271, 114-116 (1999). TLC of 10 to 20 (l of the assay mixture containing the SYBR Green II-bound reaction products AMP and ADP on silica with dioxane - NH3 - water 6:1:4. The resulting fluorescence image was directly scanned and quantitated.

60th Indian Pharmaceutical Congress PA-230 (2008). HPTLC of amlodipine besylate (AB) and telmisartan (TMS) on silica gel with ethyl acetate - 1,4-dioxane - methanol - 25 % ammonia 30:3:6:3. The hRf value was 16 for TMS and 33 for AB. Quantitative determination by absorbance measurement at 323 nm. The method was linear in the range of 100-500 µg/mL (TMS) and 200-1000 µg/mL (AB), average recovery was 100.2-100.4 %.

J. Planar Chromatogr. 16, 211-213 (2003). TLC of nimesulide on silica gel, prewashed with methanol, with toluene - acetone 10:1 in an unsaturated glass chamber. Densitometry at 310 nm in absorbance mode. The method is characterized by high sensitivity (0.1 mg/l) and within-run and day-to-day coefficients of variation of 2.8-4.5% and 4.8-8.5%, respectively. New simple, quick, and reliable method.