2003
DOI: 10.1590/s0100-46702003000100005
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Potentiometric determination of captopril in pharmaceutical formulations

Abstract: A simple, precise, rapid and low-cost potentiometric method for captopril determination in pure form and in pharmaceutical preparations is proposed. Captopril present in tablets containing known quantity of drug was potentiometrically titrated in aqueous solution with NaOH using a glass pH electrode, coupled to an autotitrator. No interferences were observed in the presence of common components of the tablets as lactose, microcrystalline cellulose, croscarmellose sodium, starch and magnesium stearate. The anal… Show more

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Cited by 28 publications
(22 citation statements)
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“…It is a well known drug applied in the treatment of hypertension, coronary heart disease and congestive heart failure following myocardial infarction as well as in diabetic nephropathy. 1,2 Many analytical methods have been developed for CP determination, such as visual titrimetry, 3 electrometric methods, [4][5][6][7][8] capillary electrophoresis, 9 capillary isotachophoresis, 10 flow injection analysis, 11 and chromatographic methods. [12][13][14][15][16][17] The most widely used technique for captopril determination is high-performance liquid-chromatography.…”
Section: Introductionmentioning
confidence: 99%
“…It is a well known drug applied in the treatment of hypertension, coronary heart disease and congestive heart failure following myocardial infarction as well as in diabetic nephropathy. 1,2 Many analytical methods have been developed for CP determination, such as visual titrimetry, 3 electrometric methods, [4][5][6][7][8] capillary electrophoresis, 9 capillary isotachophoresis, 10 flow injection analysis, 11 and chromatographic methods. [12][13][14][15][16][17] The most widely used technique for captopril determination is high-performance liquid-chromatography.…”
Section: Introductionmentioning
confidence: 99%
“…In order to assure the quality of CPT containing pharmaceutical formulations, several methods have been developed for its determination, including batch fl uorimetry [3], chemiluminescence [4 -7], AAS [8,9], high-performance liquid chromatography (HPLC) [10 -17], GC [18], differential pulse polarography [19], amperometry [20 -22], volumetric titration [23], potentiometric titration [24 -28], capillary electropho-Artigo Article Artigo Article resis [29], conductometry [30], coulometry [31], voltammetry [32] and potentiometry [33].…”
Section: N Cooh Co Hs Chmentioning
confidence: 99%
“…Amostras, na forma de comprimido, contendo captopril foram adquiridas no comércio e analisadas pelo método proposto e os resultados comparados com aqueles obtidos empregando-se um procedimento potenciométrico descrito por Ribeiro e colaboradores 9 . Dez comprimidos de cada amostra foram triturados e para o preparo da solução foi utilizada uma massa equivalente a um comprimido, que foi dissolvida em 10 mL de água desionizada e titulada com solução padronizada de CuSO 4 .5H 2 O.…”
Section: Determinação De Captopril Em Amostras Comerciaisunclassified
“…Como procedimento comparativo para validar o procedimento proposto empregou-se uma titulação potenciométrica da solução do fármaco com solução de hidróxido de sódio e um eletrodo de vidro combinado como eletrodo indicador 9 .…”
Section: Procedimento Comparativounclassified
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