2010 · 18 citations · 11 references
PharmacyPharmaceutical AnalysisPharmaceuticsBiopharmaceuticsClinical PharmacologyDissolution TestingBioanalytical Method ValidationDrug SolubilitySolubility EnhancementSpectroscopic Analysis Of PharmaceuticalsAbsorbance QuantificationAbsorbance SpectroscopyConcentrationPoorly Water-soluble DrugsQuantitative DeterminationSolubility DeterminationSpectral Absorbance AnalysisTablet Spectroscopic Analysis
A novel, safe, accurate and sensitive spectrophotometric method was developed using 2 M sodium acetate and 8 M Urea solution as hydrotropic solubilizing agent for the quantitative determination of poorly water‐soluble hydrochlorothiazide in tablet dosage form. There were more than 55 and 70 fold enhancements in the solubility of hydrochlorothiazi de increases in 2 M sodium acetate and 8 M Urea solution as compared to solubilities in distilled water. Hydrochlorothiazide shows maximum absorbance at 272 nm. Sodium acetate and urea did not show any absorbance above 240 nm, and thus no interference in the estimation was seen. Hydrochlorothiazide is obeyed Beer,s law in the concentration range of 10 t0 50μg/ml (r2= 0.999) in sodium acetate and 5 to 25 μg/ml (r2= 0.999) in urea with mean recovery 98.74 and 99.99% in sodium acetate and urea respectively. Proposed method is new, simple, economic, safe, rapid, accurate and reproducible. The developed methods were validated according to ICH guidelines and values of accuracy, precision and other statistical analysis were found to be in good accordance with the prescribed values
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Nevin Erk · Journal of Pharmaceutical and Biomedical Analysis · 2001 · 74 citations
C. V. N. Prasad, Chandrika Parihar, K. Sunil et al. · Journal of Pharmaceutical and Biomedical Analysis · 1998 · 69 citations