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

چکیده مقاله

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^-3 and 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. © J. New Mat. Electrochem. Systems.