Journal
ELECTROANALYSIS
Volume 26, Issue 10, Pages 2283-2291Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201400350
Keywords
Ordered mesoporous carbon; Thiolated polyaniline; Stripping voltammetry; Cadmium; Lead
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Funding
- Young Top-Notch Talent Support Program of China
- National Natural Science Foundation of China [51222805]
- Program for New Century Excellent Talents in University from the Ministry of Education of China [NCET-11-0129]
- Interdisciplinary Research Project of Hunan University
- Foundation for the Author of Excellent Doctoral Dissertation of Hunan Province
- Hunan Provincial Innovation Foundation for Postgraduate [CX2009B080]
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The fabrication and evaluation of a glassy carbon electrode (GCE) modified with ordered mesoporous carbon (OMC), 2-mercaptoethanesulfonate (MES)tethered polyaniline (PANI) and bismuth for simultaneous determination of trace Cd2+ and Pb2+ by differential pulse anodic stripping voltammetry (DPASV) are presented here. The morphology and electrochemical properties of the fabricated electrode were respectively characterized by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). Experimental parameters such as PANI disposition, preconcentration potential, preconcentration time and bismuth concentration were optimized. Under optimum conditions, the fabricated electrode exhibited linear calibration curves ranged from 1 to 120 nM for Cd2+ and Pb2+. The limits of detection (LOD) were 0.26 nM for Cd2+ and 0.16 nM for Pb2+ (S/N=3), respectively. Additionally, repeatability, reproducibility, interference and application were also investigated, and the proposed electrode exhibited excellent performance. The proposed method could be extended for the development of other new sensors for heavy metal determination.
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