Design of Highly Selective and Sensitive PVC-Membrane Sensor for Terbium Ions Based on Di(N-succinimidyl) carbonate as a Neutral Ion Carrier

作者：Poorghazi Mahmoodabadi Mehdy^*; Zamani Hassan Ali; Pasyar Samaneh

来源：International Journal of Electrochemical Science, 2013, 8(3): 4010-4022.

• PVC membrane
• Sensor
• Ion selective electrode
• Potentiometry

A highly selective and sensitive Tb3+-PVC membrane sensor was created from poly (vinyl chloride) (PVC) matrix membrane containing Di(N-succinimidyl) carbonate (NSC) as an neutral carrier, oleic acid (OA) as anionic excluder and nitrobenzene (NB) as a plasticizing solvent mediator. The electrode performance includes a Nernstian slope of 19.8 +/- 0.3 mVdecade(-1) across a wide concentration range between 1.0x10(-6) and 1.0x10(-2) mol L-1 and a detection limit of 5.8x10(-7) mol L-1 in a pH range of 4.0-9.0. The sensor possesses the advantages of short conditioning time, fast response time (similar to 5 s) and, especially, great selectivity towards transition and heavy metal and some mono, di and trivalent cations. The developed Tb3+ sensor was successfully used as an indicator electrode in potentiometric titration of Tb3+ ions against EDTA as well as for the determination of terbium ions in mixtures of different metal ions.

• 出版日期2013-3