Flow-Injection spectrophotometric system for captopril determination in pharmaceuticals
A simple, accurate and precise flow-injection spectrophotometric procedure is reported for the determination of captopril in pharmaceutical formulations. In this procedure, captopril was oxidized by iron(III) and the iron(II) produced was spectrophotometrically monitored as iron(II)-1,10-phenantroline complex at 540 nm. The analytical curve for captopril was linear in the concentration range from 1.0 × 10-5 to 8.0 × 10-4 mol L-1 with a detection limit of 5.0 × 10-6 mol L-1. The recovery of this analyte in five samples ranged from 98.5 to 102.4%. The analytical frequency was sixty determinations per hour and the RSD was less than 0.2% for a captopril concentration of 4.0 × 10-4 mol L-1 (n = 10). A paired t-test showed that all results obtained for captopril in commercial formulations using the proposed flow injection procedure and a potentiometric procedure agreed at the 95% confidence level.
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Sociedade Brasileira de Química
2007
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oai:scielo:S0103-505320070006000162007-12-07Flow-Injection spectrophotometric system for captopril determination in pharmaceuticalsSuarez,Willian T.Madi,Alexandro A.Figueiredo-Filho,Luiz C. S. deFatibello-Filho,Orlando captopril pharmaceutical formulations flow injection spectrophotometry A simple, accurate and precise flow-injection spectrophotometric procedure is reported for the determination of captopril in pharmaceutical formulations. In this procedure, captopril was oxidized by iron(III) and the iron(II) produced was spectrophotometrically monitored as iron(II)-1,10-phenantroline complex at 540 nm. The analytical curve for captopril was linear in the concentration range from 1.0 × 10-5 to 8.0 × 10-4 mol L-1 with a detection limit of 5.0 × 10-6 mol L-1. The recovery of this analyte in five samples ranged from 98.5 to 102.4%. The analytical frequency was sixty determinations per hour and the RSD was less than 0.2% for a captopril concentration of 4.0 × 10-4 mol L-1 (n = 10). A paired t-test showed that all results obtained for captopril in commercial formulations using the proposed flow injection procedure and a potentiometric procedure agreed at the 95% confidence level.info:eu-repo/semantics/openAccessSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society v.18 n.6 20072007-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000600016en10.1590/S0103-50532007000600016 |
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Suarez,Willian T. Madi,Alexandro A. Figueiredo-Filho,Luiz C. S. de Fatibello-Filho,Orlando |
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Suarez,Willian T. Madi,Alexandro A. Figueiredo-Filho,Luiz C. S. de Fatibello-Filho,Orlando Flow-Injection spectrophotometric system for captopril determination in pharmaceuticals |
author_facet |
Suarez,Willian T. Madi,Alexandro A. Figueiredo-Filho,Luiz C. S. de Fatibello-Filho,Orlando |
author_sort |
Suarez,Willian T. |
title |
Flow-Injection spectrophotometric system for captopril determination in pharmaceuticals |
title_short |
Flow-Injection spectrophotometric system for captopril determination in pharmaceuticals |
title_full |
Flow-Injection spectrophotometric system for captopril determination in pharmaceuticals |
title_fullStr |
Flow-Injection spectrophotometric system for captopril determination in pharmaceuticals |
title_full_unstemmed |
Flow-Injection spectrophotometric system for captopril determination in pharmaceuticals |
title_sort |
flow-injection spectrophotometric system for captopril determination in pharmaceuticals |
description |
A simple, accurate and precise flow-injection spectrophotometric procedure is reported for the determination of captopril in pharmaceutical formulations. In this procedure, captopril was oxidized by iron(III) and the iron(II) produced was spectrophotometrically monitored as iron(II)-1,10-phenantroline complex at 540 nm. The analytical curve for captopril was linear in the concentration range from 1.0 × 10-5 to 8.0 × 10-4 mol L-1 with a detection limit of 5.0 × 10-6 mol L-1. The recovery of this analyte in five samples ranged from 98.5 to 102.4%. The analytical frequency was sixty determinations per hour and the RSD was less than 0.2% for a captopril concentration of 4.0 × 10-4 mol L-1 (n = 10). A paired t-test showed that all results obtained for captopril in commercial formulations using the proposed flow injection procedure and a potentiometric procedure agreed at the 95% confidence level. |
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Sociedade Brasileira de Química |
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2007 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532007000600016 |
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AT suarezwilliant flowinjectionspectrophotometricsystemforcaptoprildeterminationinpharmaceuticals AT madialexandroa flowinjectionspectrophotometricsystemforcaptoprildeterminationinpharmaceuticals AT figueiredofilholuizcsde flowinjectionspectrophotometricsystemforcaptoprildeterminationinpharmaceuticals AT fatibellofilhoorlando flowinjectionspectrophotometricsystemforcaptoprildeterminationinpharmaceuticals |
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