A nafion film cover to enhance the analytical performance of the CuO/Cu electrochemical sensor for determination of chemical oxygen demand

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dc.careerEscuela de Ciencias Químicases
dc.category.authorprincipales
dc.contributor.authorEspinoza-Montero, Patricio Javier
dc.contributor.authorFernández Martínez, Lenys Mercedes
dc.contributor.correspondingEspinoza-Montero, Patricio Javier y Fernández Martínez, Lenys Mercedeses
dc.countryEcuadores
dc.date.accessioned2023-11-04T21:41:50Z
dc.date.available2023-11-04T21:41:50Z
dc.date.issued2019-02
dc.dedication.authorTCes
dc.description.abstractWe modified and evaluated the performance of a CuO/Cu electrochemical electrode for chemical oxygen demand (COD) determination by covering it with a Nafion (Nf) film. The resulting modified CuONf/Cu electrode sensor was used for the electrochemical determination of COD in river, slaughterhouse and estuarine water samples in order to evaluate its performance for this particular task. It was compared with the CuO/Cu sensor with no Nafion. The main electrochemical characteristics of interest, resistance, sensitivity, accuracy and reproducibility, were assessed by means of Linear Sweep Voltammetry using glucose as a standard. Results of these essays indicate that the procedure used produced smooth and firmly attached Nf films covering the whole copper surface. This sensor was shown to be resistant to interferences and effective in electro-oxidation of a wide range of organic compounds and therefore very useful for COD determination. Using the newly developed CuONf/Cu electrode an analytical linear range of 50 to 1000 mg·L−1 COD, with a detectionlimitof2.11mg·L−1 (n=6)CODwasachieved. The comparison shows that theCuONf/Cu sensor is more appropriate for COD determination than its counterpart with no Nafion.es
dc.facultyCiencias Exactas y Naturaleses
dc.id.author2100381306es
dc.id.author1757845787es
dc.id.type1es
dc.identifier.doihttps://doi.org/10.3390/s19030669es
dc.identifier.issn1424-8220
dc.identifier.urihttps://www.mdpi.com/1424-8220/19/3/669/htmes
dc.identifier.urihttps://repositorio.puce.edu.ec/handle/123456789/5905
dc.indexed.databaseScimago Journal Rankes
dc.list.authorsCarchi, T., Lapo, B., Alvarado, J., Espinoza-Montero, P., Llorca, J, y Fernández L.es
dc.magazine.pageRange1-17es
dc.magazine.titleSensorses
dc.magazine.volumeChapter19 (3)es
dc.rightsOpenAccesses
dc.statepublishedes
dc.subjectAgua - Control de calidades
dc.subjectElectroquímicaes
dc.subjectOxidaciónes
dc.titleA nafion film cover to enhance the analytical performance of the CuO/Cu electrochemical sensor for determination of chemical oxygen demandes
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