Artículos de revistas
Evaluation of boron-doped diamond electrode for simultaneous voltammetric determination of hydrochlorothiazide and losartan in pharmaceutical formulations
Registro en:
Sensors And Actuators B-chemical. Elsevier Science Sa, v. 188, n. 263, n. 270, 2013.
0925-4005
WOS:000326345600035
10.1016/j.snb.2013.07.025
Autor
Santos, MCG
Tarley, CRT
Dall'Antonia, LH
Sartori, ER
Institución
Resumen
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) A method for the simultaneous determination of hydrochlorothiazide (HCTZ) and losartan (LOS) in pharmaceutical formulations using differential-pulse voltammetry (DPV) was developed. Two very wellresolved and reproducible oxidation peaks of HCTZ and LOS, with separation of 0.23 V, were obtained in Britton-Robinson (BR) buffer (pH 9.5) using an anodically pretreated boron-doped diamond electrode. Under the optimum analytical experimental conditions, the voltammetric method exhibited linear responses for simultaneous determination of HCTZ and LOS in the concentration range 3.0 x 10(-6) to 7.4 x 10(-5) mol L-1 for both compounds, with detection limits of 1.2 x 10(-6) mol L-1 and 9.5 x 10(-7) MOI respectively. The proposed method was successfully applied in the simultaneous determination of LOS and HCTZ content in pharmaceutical formulations, whose accuracy was attested by good agreement of the results (paired t-test at a 95% confidence level) with those obtained using high performance liquid chromatography (HPLC). (C) 2013 Elsevier B.V. All rights reserved. 188 263 270 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundacao Araucaria Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) UEL Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)