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Differentiation of Detection of Ascorbic Acid and Dehydroascorbic Acid Using Hydrodynamic Amperometry and Anodic Stripping Voltammetry on Modified Aluminum Electrodes
Author(s) -
PournaghiAzar M. H.,
Dastangoo H.,
Fadakar R.
Publication year - 2010
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.200900213
Subject(s) - ascorbic acid , amperometry , dehydroascorbic acid , detection limit , chemistry , anodic stripping voltammetry , voltammetry , electrode , chromatography , stripping (fiber) , calibration curve , inorganic chemistry , electrochemistry , analytical chemistry (journal) , materials science , food science , composite material
Abstract An electroanalytical strategy for the simultaneous determination of ascorbic acid (AA) and dehydroascorbic acid (DHA), is described. A palladized Al electrode is used for hydrodynamic amperometry of AA. While the decrease of anodic stripping voltammetry current of the K 2 UO 2 [Fe(CN) 6 ]‐Pd/Al electrode prepared in the presence of DHA was the principal of the DHA determination. The calibration graph for both methods was linear over the concentration range 1–50 μM. The detection limit was found to be 0.5 μM. Some fresh fruit juices and vegetables of trace level of AA and DHA were analyzed as the typical example of application.