Highly Selective and Sensitive Tin(II) Membrane Electrode Based on a New Synthesized Schiff's Base

✍ Scribed by Morteza Hosseini; Hayedeh Bagheri Sadeghi; Mohammad Rahimi; Masoud Salavati-Niasari; Shiva Dehghan Abkenar; Kamal Alizadeh; Mohammad Reza Ganjali

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 270 KB
• Volume: 21
• Category: Article
• ISSN: 1040-0397
• DOI: 10.1002/elan.200804485

✦ Synopsis

Abstract

Studies on complex formation of tris(3‐(2‐hydroxybenzophenone)propyl)amine (THPA) with a number of metal ions in acetonitrile solution revealed the occurrence of a selective 1 : 1 complexation of the proposed ligand with Sn^2+^ ion. Consequently, THPA was used as a suitable neutral ionophore for the preparation of a polymeric membrane‐selective electrode. The electrode exhibits a Nernstian behavior with a slope of 29.4±0.3 mV per decade and a detection limit of 2.0×10^−7^ M. It also showed a good selectivity for Sn^2+^ ions in comparison with some of group A and B metal ions over a wide concentration range of 5.0×10^−7^–1.0×10^−1^ M. Improved selectivity was achieved compared to the best selectivity recently reported by other authors for tin(II). The electrode was successfully applied to the determination of Sn^2+^ ion in waste water and various canned products.