Artículo
Studying current-potential curves throughout a bipotentiometric iodometric back-titration for the determination of ascorbic acid in fruits and vegetables
Fecha de publicación:
12/2004
Editorial:
American Chemical Society
Revista:
Journal Of Chemical Education
ISSN:
0021-9584
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A method for the determination of the ascorbic acid content in fruits and vegetables was used to introduce the principles of voltammetry. The procedure combines an iodometric back-titration with voltammetric (bipotentiometric) end point detection, which minimizes the risk of ascorbic acid oxidation, allowing for a rapid and efficient quantification of vitamin C in fruits and vegetables. A better understanding of the titration curve is achieved by analyzing the schematic current–potential curves of the anodic and cathodic half-cell reactions during the titration. Hence, not only theoretical principles of voltammetry are considered, but also the applications of these techniques to quantify a chemical species in a complex matrix. As a result, the laboratory experiment proposed is a valuable tool for analytical chemistry students to discuss electrochemistry techniques in the context of an interesting application.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(INTEC)
Articulos de INST.DE DES.TECNOL.PARA LA IND.QUIMICA (I)
Articulos de INST.DE DES.TECNOL.PARA LA IND.QUIMICA (I)
Citación
Verdini, Roxana Andrea; Lagier, Claudia Marina; Studying current-potential curves throughout a bipotentiometric iodometric back-titration for the determination of ascorbic acid in fruits and vegetables; American Chemical Society; Journal Of Chemical Education; 81; 12-2004; 1482-1485
Compartir