Ion-Selective Carbon Paste Electrode Based on 2-Amino-N-benzthioazolyl Benzamide (ABTB) for Determination of Copper (II) by Potentiometric Method

2-Amino-N-benzthioazolyl benzamide (ABTB) was synthesized, characterized and used for thefabrication of a potentiometric sensor for Cu2+ metal ions. The electrode exhibits linear response to Cu(II) over a wide concentration range (4.79×10 -8 – 1.85×10 -1 M) with Nernstian slope of 30 ± 1.5 mVper decade. The electrode can be used in the pH range from 2 to 9. It has a fast response time of about10 s and can be used for a period of four months with good reproducibility. The detection limit of thiselectrode was 2.91×10 - 8 M. The proposed electrode shows a very good selectivity for Cu (II) over awide variety of metal ions. This chemically modified carbon paste electrode was successfully used forthe determination of Cu (II) in electronics waste sample solution.