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Detection of Trace Heavy Metal Ions Using Carbon Nanotube‐ Modified Electrodes
Abstract
A sensitive voltammetric method for detection of trace heavy metal ions using chemically modified carbon nanotubes (CNTs) electrode surfaces is described. The CNTs were covalently modified with cysteine prior to casting on electrode surfaces. Cysteine is an amino acid with high affinities towards some heavy metals. In this assay, heavy metals ions accumulated on the cysteine‐modified CNT electrode surfaces prior to being subjected to differential pulse anodic stripping voltammetry analysis. The resulting peak currents were linearly related to the concentrations of the metal ions. The method was optimized with respect to accumulation time, reduction time and reduction potential. The detection limits were found to be 1 ppb and 15 ppb for Pb 2+ and Cu 2+ respectively. The technique was used for the detection of Pb 2+ and Cu 2+ in spiked lake water. The average recoveries of Pb 2+ and Cu 2+ were 96.2% and 94.5% with relative standard deviations of 8.43% and 7.53% respectively. The potential for simultaneous detection of heavy metal ions by the modified CNTs was also demonstrated.
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Cites
Enzyme-coated carbon nanotubes as single-molecule biosensors
Besteman, K., Lee, J.-O., Wiertz, F. G. M., Heering, H. A., & Dekker, C. (2003) · Nano Letters · doi:10.1021/nl034139u · Cited by 1,294
Modulation of p53, ErbB1, ErbB2, and Raf-1 Expression in Lung Cancer Cells by Depsipeptide FR901228
Yu, X. (2002) · CancerSpectrum Knowledge Environment · doi:10.1093/jnci/94.7.504 · Cited by 360
Cited by
Nanostructured Sensors for Detection of Heavy Metals: A Review
Li, M., Gou, H., Al-Ogaidi, I., & Wu, N. (2013) · ACS Sustainable Chemistry & Engineering · doi:10.1021/sc400019a · Cited by 606
Gao, C., Guo, Z., Liu, J.-H., & Huang, X.-J. (2012) · Nanoscale · doi:10.1039/c2nr11757f · Cited by 424
Privett, B. J., Shin, J. H., & Schoenfisch, M. H. (2010) · Analytical Chemistry · doi:10.1021/ac101075n · Cited by 334
Metadata
- Authors
- Morton, J., Havens, N., Mugweru, A., & Wanekaya, A. K.
- Venue
- Electroanalysis
- Publisher
- Wiley
- Published
- 2009-07
- Volume
- 21
- Issue
- 14
- Pages
- 1597-1603
- ISSN
- 1040-0397 (ISSN-L)
- 1521-4109
- OpenAlex
- W2020817023
- Cited by
- 178
- References
- 2
- FWCI
- 5.87
- Type
- journal article
- Language
- en
- Open access
- closed
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- Morton, J., Havens, N., Mugweru, A., & Wanekaya, A. K. (2009). Detection of Trace Heavy Metal Ions Using Carbon Nanotube‐ Modified Electrodes. Electroanalysis. https://doi.org/10.1002/elan.200904588
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