Modification of Multiwalled Carbon Nanotubed by Dipyridile Amine for Potentiometric Determination of Lead(II) Ions in Environmental Samples

作者：Zhad Hamid Reza Lotfi Zadeh; Aboufazeli Forouzan; Amani Vahid; Najafi Ezzatollah^*; Sadeghi Omid

来源：Journal of Chemistry, 2013, 2013: 414375.

DOI：10.1155/2013/414375

A carbon paste electrode was modified by dipyridile amine functionalized multiwalled carbon nanotubes for determination of trace amounts of lead(II) ions. The electrode composition was graphite power 70%, paraffin 23%, and dipyridile amine modified MWCNTs 7% (W/W). The linear range for lead(II) was 9.5 x 10(-8) to 2.5 x 10(-3) mol L-1, and the limit of detection was obtained 7.0 x 10(-8) mol L-1. The lifetime of the electrode was ten weeks, and a fast response time was observed. The electrode was used for determination of trace amounts of Pb(II) ions in real samples and standard reference materials of water, soil, and plant.

• 出版日期2013