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Modification of Carbon Paste Electrodes using Pyridine Functionalized SBA-15 and Multi-walled Carbon Nanotubes (MWCNTs) for Determination of Lead Ions in Real Aqueous Solutions

Department of Chemistry, Islamic Azad University Shahr-e-Rey Branch, P. O. Box 18735-334, Tehran, Iran

Department of Chemistry, Islamic Azad University Kazerun Branch, P. O. Box 73135-168, Kazerun, Shiraz, Iran

Corresponding Author Email:

h2o.group.chem@gmail.com

Received:

October 08, 2010

| |

Accepted:

January 26, 2011

| | Citation

v14n01a06_p039-042.pdf

OPEN ACCESS

Abstract:

For determination of trace amounts of lead(II) ions, a carbon paste electrode was modified with functionalized SBA-15 and Multi-Walled Carbon Nanotubes. The electrode composition was graphite powder 59%, Paraffin 23%, modified SBA-15 14%, MWCNTs 4% (W/W). The linear range for lead(II) was 6.5×10^-8 to 2.0×10^-3and the limit of detection was obtained 5.5×10^-8 mol L^-1. The lifetime of the electrode was 4 months and a fast response time was observed. The electrode was used for determination of trace amounts of lead in real samples.

Keywords:

Carbon paste electrode; Lead; Modified SBA-15; MWCNTs; Potentiometry

1. Introduction

2. Experimental

3. Results and Discussion

4. Conclusion

References

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Modification of Carbon Paste Electrodes using Pyridine Functionalized SBA-15 and Multi-walled Carbon Nanotubes (MWCNTs) for Determination of Lead Ions in Real Aqueous Solutions