Ultrasensitive Voltammetric Detection of Trace Lead(II) and Cadmium(II) Using MWCNTs‐Nafion/Bismuth Composite Electrodes
作者： He Xu , Liping Zeng , Sujie Xing , Yuezhong Xian , Guoyue Shi
关键词:
摘要: Multiwall carbon nanotubes were dispersed in Nafion (MWCNTs-NA) solution and used combination with bismuth (MWCNTs-NA/Bi) for fabricating composite sensors to determine trace Pb(II) Cd(II) by differential pulse anodic stripping voltammetry (DPASV). The electrochemical properties of the MWCNTs-NA/Bi composites film modified glassy electrode (GCE) evaluated. synergistic effect MWCNTs was obtained detection improved sensitivity reproducibility. Linear calibration curves ranged from 0.05 100 μg/L 0.08 Cd(II). determination limits (S/N=3) 25 ng/L Pb 40 ng/L Cd, which compared favorably previously reported methods area detection. electrodes successfully applied real sample, results present method agreed well those atomic absorption spectroscopy.
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