Electrochemically etched gold wire microelectrode for the determination of inorganic arsenic

doi:10.1016/j.electacta.2017.01.184

	Electrochemically etched gold wire microelectrode for the determination of inorganic arsenic
	Zhou, Chi 1,2; Yang, Meng 1,2; Li, Shan-Shan1,2 ; Jiang, Tian-Jia 1,2; Liu, Jin-Huai1 ; Huang, Xing-Jiu1 ; Chen, Xing 1
	2017-03-20
Source Publication	ELECTROCHIMICA ACTA
Abstract	An electrochemical method for direct determination of inorganic arsenic [As(III), As(V), and total inorganic arsenic] was developed using an electrochemically etched gold wire microelectrode (Au-ME) by square wave anodic stripping voltammetry. Bromide was adopted to facilitate the electrochemical etching of gold through its complexation with gold ions, and controllably etched gold wire microelectrode can be obtained by adjusting the linear sweep voltammetry recycling numbers. Although the diameter of Au-ME decreases from 25.67 to 15.41 mm, for the determination of As(III) in 0.5 M H2SO4, the sensitivity increases 1.5-fold to 6.8 mu A cm(-2) ppb(-1) and the limit of detection (LOD) decreases 2.8-fold to 2.6 ppb; for determination of As(V) in 0.25 M HCl, the sensitivity increases 1.6-fold to 2.6 mu A cm(-2) ppb(-1) and LOD decreases 2.5-fold to 3.9 ppb. The As(V) deposition mechanism is put forward: first, chemically reduce to As(III) associated with active chlorine, and then electrochemically reduce to As(0), which experience two reduction step. Given that the LODs for both As(III) and As(V) are lower than the arsenic guideline value of 10 ppb, Au-ME shows efficiency in determining trace arsenic when applied to real environmental samples. (C) 2017 Elsevier Ltd. All rights reserved.
Subtype	Article
Keyword	Electrochemical Etching Gold Wire Microelectrode Electrochemical Determination Arsenite Arsenate
WOS Headings	Science & Technology ; Physical Sciences
DOI	10.1016/j.electacta.2017.01.184
WOS Keyword	ANODIC-STRIPPING VOLTAMMETRY ; GLASSY-CARBON ELECTRODE ; MICROWIRE ELECTRODE ; SENSITIVE DETECTION ; AS(III) OXIDATION ; ROOM-TEMPERATURE ; NATURAL-WATERS ; MERCURY ; AU ; SEAWATER
Indexed By	SCI
Language	英语
Funding Organization	National Basic Research Program of China(2011CB933700 ; National Basic Research Program of China(2011CB933700 ; National Basic Research Program of China(2011CB933700 ; National Basic Research Program of China(2011CB933700 ; National High Technology Research and Development Program of China (863 Program)(2013AA065602) ; National High Technology Research and Development Program of China (863 Program)(2013AA065602) ; National High Technology Research and Development Program of China (863 Program)(2013AA065602) ; National High Technology Research and Development Program of China (863 Program)(2013AA065602) ; National Natural Science Foundation of China(21377131 ; National Natural Science Foundation of China(21377131 ; National Natural Science Foundation of China(21377131 ; National Natural Science Foundation of China(21377131 ; 2013CB934300) ; 2013CB934300) ; 2013CB934300) ; 2013CB934300) ; 21475133 ; 21475133 ; 21475133 ; 21475133 ; 61474122 ; 61474122 ; 61474122 ; 61474122 ; 51202052) ; 51202052) ; 51202052) ; 51202052)
WOS Research Area	Electrochemistry
WOS Subject	Electrochemistry
WOS ID	WOS:000398324500027
Citation statistics	Cited Times:20[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.hfcas.ac.cn:8080/handle/334002/32885
Collection	中科院合肥智能机械研究所
Affiliation	1.Chinese Acad Sci, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Dept Chem, Hefei 230026, Peoples R China
Recommended Citation GB/T 7714	Zhou, Chi,Yang, Meng,Li, Shan-Shan,et al. Electrochemically etched gold wire microelectrode for the determination of inorganic arsenic[J]. ELECTROCHIMICA ACTA,2017,231(无):238-246.
APA	Zhou, Chi.,Yang, Meng.,Li, Shan-Shan.,Jiang, Tian-Jia.,Liu, Jin-Huai.,...&Chen, Xing.(2017).Electrochemically etched gold wire microelectrode for the determination of inorganic arsenic.ELECTROCHIMICA ACTA,231(无),238-246.
MLA	Zhou, Chi,et al."Electrochemically etched gold wire microelectrode for the determination of inorganic arsenic".ELECTROCHIMICA ACTA 231.无(2017):238-246.

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