Electrochemically monitoring the removal of bisphenol A based on its anodic deposition at an ITO electrode

In this paper, bisphenol A (BPA) was successfully deposited on an indium–tin oxide (ITO) electrode by the method of multiple sweep voltammetry. The BPA deposition was found to be affected by the upper potential limit of the multiple sweep voltammetry, the voltammetric sweep number, pH value and BPA...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2011-12, Vol.160 (1), p.784-790
Main Authors: Zhang, Jin, Li, Qian, Chen, Miaojing, Li, Hong, Xu, Zhenghe
Format: Article
Language:English
Subjects:
Bisphenol A
Deposition
Deposits
detection limit
Electrochemistry
Electrodes
Indium tin oxide
microscopy
Monitoring
redox reactions
Removal
Sensor
Sensors
Voltammetry
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Summary:In this paper, bisphenol A (BPA) was successfully deposited on an indium–tin oxide (ITO) electrode by the method of multiple sweep voltammetry. The BPA deposition was found to be affected by the upper potential limit of the multiple sweep voltammetry, the voltammetric sweep number, pH value and BPA concentration. The resulting BPA deposit showed excellent redox activity in an appropriate potential range between −0.2 V and 0.4 V as well as high ionic–electronic conductivity, revealed by ex-situ voltammetry and scanning electrochemical microscopy. On the basis of redox reactions of the BPA deposit on the ITO electrode, an electrochemical sensor for monitoring the removal of BPA was further proposed. The linear response range was found to be between 0.5 μM and 50 μM with a detection limit of 0.4 μM ( S/ N = 3). The results from this study have provided an alternative in situ method for monitoring of BPA removal.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2011.08.063