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Stripping Analysis of Trace Arsenic Based on the MnO x /AuNPs Composite Film Modified Electrode in Alkaline Media
Author(s) -
Wu Shouguo,
Zhao Qiping,
Zhou Lei,
Zhang Zhixin
Publication year - 2014
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.201400219
Subject(s) - detection limit , anodic stripping voltammetry , stripping (fiber) , arsenic , electrode , materials science , manganese , anode , cyclic voltammetry , bismuth , working electrode , voltammetry , inorganic chemistry , analytical chemistry (journal) , chemistry , electrochemistry , metallurgy , chromatography , composite material
A simple, rapid fabricated and sensitive modified electrode for detection of As(III) in alkaline media was proposed. The modified electrode was prepared by co‐electrodeposition of manganese oxides (MnO x ) and gold nanoparticles (AuNPs) on the glassy carbon electrode (GCE) with cyclic voltammetry. Linear sweep anodic stripping voltammetry (LS‐ASV) was employed for the determination of arsenic (III) without interference from Cu(II), Hg(II), and other coexisting metal ions. A lower detection limit of 0.057 µg L −1 ( S/N =3) were obtained with a accumulation time of 200 s. The proposed method was successfully applied to determine arsenic (III) in real water samples with satisfactory recoveries.