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M. Yang, X. Chen, T. J. Jiang, Z. Guo, J. H. Liu and X. J. Huang, Electrochemical detection of trace arsenic（III)）by nanocomposite of nanorod-like alpha-MnO2 decorated with approximately 5 nm Au nanoparticles: Considering the change of arsenic speciation, Anal. Chem., 2016, 88, 9720–9728.