NDLI: An electrochemical sensor based on a magnetic Fe<sub>3</sub>O<sub>4</sub> nanoparticles and gold nanoparticles modified electrode for sensitive determination of trace amounts of arsenic(iii)

Content Provider	Royal Society of Chemistry (RSC)
Author	Cui, Hong Yang, Weiying Yuan, Zhuobin Li, Xiangjun Zhao, Hong
Copyright Year	2012
Abstract	A simple and sensitive method for the detection of arsenic(III) using a magnetic Fe3O4 nanoparticles and gold nanoparticles modified glassy carbon electrode (Au NPs/Fe3O4/GCE) was developed. The Fe3O4 nanoparticles were dropped onto a GCE and the gold nanoparticles were electrodeposited later. The resulting electrode surfaces were characterized with both field emission scanning electron microscopy (FESEM) and electrochemical impedance spectroscopy (EIS). Square wave anodic stripping voltammetry (SWASV) was performed for the determination of arsenic(III). The obtained results show that the sensitivity of arsenic(III) is significantly improved on Au NPs/Fe3O4/GCE in comparison with Au NPs/GCE. Under optimal conditions, the detection limit (S/N = 3) was 0.00097 μg L−1. In addition, the modified electrode exhibited excellent reproducibility and high stability. The developed method was successfully applied to determine arsenic(III) in real water samples with satisfactory results.
Starting Page	4176
Ending Page	4181
Page Count	6
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	4
Issue Number	12
Journal	Analytical Methods
DOI	10.1039/c2ay25913c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Spectroscopy Electrode Arsenic Electrochemical stripping analysis Electrochemistry Electroplating Carbon Scanning electron microscope Electrical impedance Square wave
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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