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Highly selective and sensitive copper(II) membrane coated graphite electrode based on a recently synthesized Schiff’s base |
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| Authors: | Mohammad Reza Ganjali Tahereh Poursaberi Leila Haji-agha Babaei Shohre Rouhani Mohammad Yousefi Maryam Kargar-Razi Abolghasem Moghimi Hossein Aghabozorg Mojtaba Shamsipur |
| Affiliation: | a Department of Chemistry, Tehran University, Tehran, Iran b Department of Chemistry, Alzahra University, Tehran, Iran c Research Branch of Islamic Azad Tehran University, Tehran, Iran d Department of Chemistry, Imam Hossein University, Tehran, Iran e Department of Chemistry, Tarbiat Moallem University, Tehran, Iran f Department of Chemistry, Razi University, Kermanshah, Iran |
| Abstract: | A PVC membrane electrode based on bis-2-thiophenal propanediamine (TPDA) coated directly on graphite is described. The electrode exhibits a Nernstian response for Cu2+ over a very wide concentration range (1.0×10−1 to 6.0×10−8 M) with a detection limit of 3.0×10−8 M (2.56 ng ml−1). It has a fast response time and can be used for at least 2 months without any major deviation. The proposed sensor revealed very good selectivities for Cu2+ over a wide variety of other metal ions and could be used in the pH range of 3.0–7.0. It was successfully used for direct determination of copper in black tea and as an indicator electrode in potentiometric titration of copper ion. |
| Keywords: | Copper ion-selective electrode PVC membrane Graphite Bis-2-thiophenal propanediamine |
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