Copper(II)-Selective Membrane Electrode Based on a Recently Synthesized Macrocyclic Diamide

✍ Scribed by Mojtaba Shamsipur; Shohre Rouhani; Mohammad Reza Ganjali; Hossein Eshghi; Hashem Sharghi

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 58 KB
• Volume: 63
• Category: Article
• ISSN: 0026-265X
• DOI: 10.1006/mchj.1999.1784

✦ Synopsis

A recently synthesized 23-member macrocyclic diamide was used as a membrane-active component to prepare a new Cu 2ϩ -selective polymeric membrane electrode. The electrode exhibits a Nernstian response for copper(II) ions over a wide concentration range (1.0 ϫ 10 Ϫ1 to 3.2 ϫ 10 Ϫ5 M), with a limit of detection of 1.2 ϫ 10 Ϫ5 M (0.77 ppm). It has a response time Ͻ20 s and can be used for at least 3 months without any considerable divergence in potentials. The proposed membrane sensor revealed very good selectivities for Cu 2ϩ over a wide variety of other metal ions and could be used in the pH range 3.5-6.0. It was used as an indicator electrode in potentiometric titration of copper ions with EDTA.