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