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Selective Voltammetric Analysis of o ‐Diphenols from Olive Oil Using Na 2 MoO 4 as Electrochemical Mediator
Author(s) -
Del Carlo M.,
Amine A.,
Haddam M.,
della Pelle F.,
Fusella G. C.,
Compag D.
Publication year - 2012
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201100603
Subject(s) - amperometry , electrochemistry , electrode , selectivity , molybdate , graphite , chemistry , flow injection analysis , materials science , nuclear chemistry , inorganic chemistry , detection limit , chromatography , organic chemistry , catalysis
The complexing ability of molybdate vs. o ‐diphenols has been exploited for their selective electrochemical detection. Graphite screen printed and carbon paste electrodes have been evaluated as electrochemical transducers for the selective mediated detection of o ‐diphenol compounds in the presence of Na 2 MoO 4 . Immobilization of the mediator onto the electrode surface has also been achieved using different types of single and multiwall carbon nanotubes. The best sensor in terms of selectivity, sensitivity and stability was the Mo‐MW‐CNT‐NH 2 modified electrode. Using the mediator either in solution or immobilized, detection of o ‐diphenols with linearity in the ppm range was achieved. An amperometric flow injection analysis set‐up was used to detect the o ‐diphenolic content of phenolic extracts obtained from olive oil samples.