Abstract
Simple and sensitive spectrophotometric and spectrofluorimetric methods have been developed for the determination of hydrochlorothiazide (I), indapamide (II) and xipamide(III) based on ternary complex formation with eosin and lead (II) in the presence of methylcellulose as surfactant. The methods do not involve solvent extraction. For spectrophotometric method, the ternary complex showed an absorption maximum at 543 nm. The factors affecting the formation of ternary complex were studied and optimized. The method obeys Beer’s law over concentration range of 8–40 μg mL−1. A fluorescence quenching method for the determination of the cited drugs by forming this ternary complex was also investigated for the purpose of enhancing the sensitivity of the determination. The analytical performance of both methods was fully validated, and the results were satisfactory. The methods have been successfully applied for the determination of the studied drugs in their pharmaceutical tablets and the results obtained ware in good agreement with those obtained by the reference method. Common excipients used as additives in tablets do not interfere with the proposed methods.
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Omar, M.A. Spectrophotometric and Spectrofluorimetric Determination of Certain Diuretics Through Ternary Complex Formation with Eosin and Lead (II). J Fluoresc 20, 275–281 (2010). https://doi.org/10.1007/s10895-009-0551-2
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DOI: https://doi.org/10.1007/s10895-009-0551-2