On-site determination of Pb<sup>2+</sup> and Cd<sup>2+</sup> in seawater by double stripping voltammetry with bismuth-modified working electrodes

Zhang, X, Zhang, Y, Ding, D, Zhao, J, Liu, J, Yang, Wenrong and Qu, K 2016, On-site determination of Pb2+ and Cd2+ in seawater by double stripping voltammetry with bismuth-modified working electrodes, Microchemical journal, vol. 126, pp. 280-286, doi: 10.1016/j.microc.2015.12.010.

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Title On-site determination of Pb2+ and Cd2+ in seawater by double stripping voltammetry with bismuth-modified working electrodes
Author(s) Zhang, X
Zhang, Y
Ding, D
Zhao, J
Liu, J
Yang, WenrongORCID iD for Yang, Wenrong orcid.org/0000-0001-8815-1951
Qu, K
Journal name Microchemical journal
Volume number 126
Start page 280
End page 286
Total pages 7
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-05-01
ISSN 0026-265X
Keyword(s) Heavy metals
On-site determination
Double stripping voltammetry
Bi film
Environmental monitoring
Summary To meet the urgent requirement of determining trace Pb2+ and Cd2+ in seawater on site, herein we developed a simple but novel electrochemical method, named as double stripping voltammetry, using only a portable heavy metal analyzer. The proposed method consisted of three steps: First, the targeted heavy metal ions in bulk solution were concentrated onto an ionic liquid-graphite-based paste working electrode (ILGPE), which exhibits a dramatic ability of accumulation, by electrodeposition in the presence of Bi3+. Second, the three-electrode arrangement, including the ILGPE loaded with the reduced products, was transferred into 1.0mL acetate buffer solution, followed by a stripping procedure. Third, the measurement was performed with the other stripping voltammetry procedure by using a glassy carbon electrode as working electrode. Under optimum conditions, the linear range values for Pb2+ and Cd2+ in seawater were 0.2-3.2 μg/L and 0.1-3.2 μg/L, respectively. The concentrations of Pb2+ and Cd2+ in five real samples collected from coastal sites of Qingdao City were determined on site, and the results were in good agreement with that obtained with the atomic absorption spectroscopy method. In addition, the analytical performance of working electrode modified with Bi film by in situ mode was investigated in comparison with that by ex situ mode. The results showed that the in situ mode was much better than the ex situ one.
Language eng
DOI 10.1016/j.microc.2015.12.010
Field of Research 030102 Electroanalytical Chemistry
050206 Environmental Monitoring
030199 Analytical Chemistry not elsewhere classified
Socio Economic Objective 970105 Expanding Knowledge in the Environmental Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30085386

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