Copper Selective Electrode Based on 1,8-bis(2-Hydroxynaphthaldiminato)3,6-Dioxaoctane

Mohammad Mazloum Ardakani^a*, Seyed Hasan Mirhoseini^b, Masoud Salavati-Niasari^b

^aChemistry Department, Yazd University, Yazd, Iran.
^bChemistry Department, Kashan University, Kashan, Iran.
E-mail: mazloum@kashanu.ac.ir

Absrtract
A coated–wire ion selective electrode, which was selective and sensitive to Cu (II) ions, was developed using 1, 8-Bis(2-hydroxynaphthaldiminato)3, 6-dioxaoctane as carrier. The electrode exhibits a good potentiometric response for Cu (II) over a wide concentration range (3.3×10^-6-1.0 M) with a slope 29.0±0.5 mV/decade. The proposed electrode has a response time between 10-15 s. The electrode is suitable for use in aqueous solutions in a wide pH range of 4.0 to 8.0. Applications of the proposed electrode to the determination of copper in real samples and as an indicator electrode for potentiometric titration of Cu²⁺ion with EDTA are reported.

Key words: Coated wire copper-selective electrode, 1,8-Bis(2-hydroxynaphthaldiminato)3,6- Dioxaoctaneas, Potentiometry