Journal of Environmental Health Sciences (한국환경보건학회지)

Korean Society of Environmental Health (한국환경보건학회)
권호 표지

Determination of Lead(II) at Nation-Coated Glassy Carbon Electrodes Modified by Tetren-Glycerol

Nafion-Tetren-Glycerol이 수식된 유리탄소전극에서 납(II) 이온의 정량

  • Published : 2003.06.01
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Abstract

Differential pulse voltammetry (DPV) using nafion-coated glassy carbon electrodes modified with Tetren(tetraethylene pentamine)-glycerol showed sensitivity for determining lead (II) at low concentration. The Lead (II) was accumulated on the electrode surface by the formation of the complex in an open circuit, and the resulting surface was characterized by medium exchange, electrochemical reduction, and differential pulse voltammetry. Various experimental parameters, such as the composition of modifier, preconcentration time, pH of electrolyte (0.1 M acetate buffer), and parameters of differential pulse voltammetry, were optimized. The initial potential was applied for 50 s, the electrode was scanned from -0.9 to -0.3 V, and the anodic peak current was measured at -0.604 V $\pm$ 0.015 V (vs. Ag/AgCl). The calibration plot was obtained in the range 1.0$\times$10$^{-8}$ M~l.0$\times$10$^{-6}$ M with pH 4.5 buffer solution. The detection limit (3$\sigma$) it as low as 5.0$\times$ 10$^{-9}$ M. This method is applied to the determination of lead(II) in a certified reference material and the result agrees satisfactorily with the certified value.

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References

  1. Lobinski, R., Witte, C., Adams, F. C., Teissedre, P. L., Cabanis. J. C. and Boutron, C. F. : Organolead in wine, Nature, 370, 24, 1994
  2. Boeckx, R. L. : Lead poisoning in children. Anal. Chem., 58. 274-287. 1986 https://doi.org/10.1021/ac00293a001
  3. Dong. S. and Wang, Y. : Electroanlysis, 1, 99, 1989
  4. Wang. J. : Stripping Analysis, Principles, Instrumentation and Applications, VCH: Deerfield Beach, FL.: 1985
  5. Liu, A-C., Chen, D-C., Lin, C-C., Chou. H-H. and Chen, C-H. : Application of cystein monolayer for electrochemical determination of sub-ppb copper(II). Anal. Chem., 71, 1549-1552. 1999 https://doi.org/10.1021/ac980956g
  6. Gao, Z., Wang, G., Li, P. and Zhao, Z. : Differential pulse voltammetric determination of cobalt with a perfluorinated sulfonated polymer-2,2-bipyridyl dified carbon paste electrode. Anal. Chem., 63, 953-957. 1991 https://doi.org/10.1021/ac00010a004
  7. Abruna, H. D. and Guadalupe, A. R. : Electroanalysis with chemically modified electrodes. Anal. Chem., 57, 142-149, 1985 https://doi.org/10.1021/ac00279a036
  8. Harris, D. C. : Quantitative chemical analysis, 5th Ed., W. H. Freeman and Company. 1999
  9. Watson, C. M., Dwyer, D. J., Andle, J.. C., Bruce, A. E. and Bruce, M. R. : Stripping analyses of mercury using gold electrode : Irreversible adsorption of mercury. Anal. Chem., 71, 3181-3186, 1999 https://doi.org/10.1021/ac981312b
  10. Kiekens, P., Mertens, M., Bogaert, M. and Temmerman, E. ; Determination of Mercury by Anodic-stripping Voltammetry Using a Glassy Carbon Rotating Disc Electrode. Analyst, 109, 909-911, 1984 https://doi.org/10.1039/an9840900909
  11. Shi, M. and Anson, F. C. : Some consequences of the signilicantly different mobilities of hydrophilic and hydrophobic metal complexes in perfluorosulfonated nomer coatings on electrodes. Anal. Chem., 69, 2653-2660, 1997 https://doi.org/10.1021/ac970137g
  12. Zook, L. A. and Leddy, Johna : Density and solubility of nafion : Recast, annealed, and commercial films. Anal. Chem., 68, 3793-3796, 1996 https://doi.org/10.1021/ac960604e
  13. Moore, R. B. and Martin. C. R. : Procedure for preparing solution-cast perfluono-sulfonate ionomer films and membranes. Anal. Chem., 58, 2569-2570, 1986 https://doi.org/10.1021/ac00125a046
  14. Martin, C. R. and Freiser, H. : lon-selective electrodes based on an ionic polymer, Anal. Chem., 53, 902-904, 1981 https://doi.org/10.1021/ac00229a037
  15. Martin, C. R., Rubinstein, I. and Bard A. J. : Polymer films on electrodes. 9. electron and mass transfer in nafion films containing $Ru(bpy)_3{^{2+}}$. J. Am. Chem. Soc., 104, 4817-4824, 1982 https://doi.org/10.1021/ja00382a014
  16. 박상희, 박찬주, 박은희, 고영춘, 정근호 : Nafion-EDTA-Glycerol이 수식된 유리탄소전극에서 납(Ⅱ) 이온의 펄스차이 전압전류법, 한국환경위생학회지, 28, 53-58, 2002
  17. Zhong, C.-J. and Porter, M. D. : Anal. Chem., 63, 709A, 1995
  18. Harris, D. C. : Quantitative chemical analysis, 5th Ed., W. H. Freeman and Company, 74, 1999