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- Title
Nikel-Sakkarin Temelli PVC-Membran Karbonat (CO<sub>3</sub><sup>2-</sup>) Seçici Elektrot ve Potansiyometrik Uygulamaları.
- Authors
Topcu, Cihan
- Abstract
In this study, a nickel saccharine (Ni-sac) complex was used as ionophore and various membrane compositions (PVC-plasticizerionophore) at different ratios were prepared by using it as ionophore. Various potentiometric electrodes were constructed by coating the prepared membranes on the solid-contact surfaces of the electrodes and their potentiometric behaviors were investigated. The potentiometric measurements performed with the prepared electrodes showed that the Ni-saccharine complex material exhibited sensitive and selective response towards carbonate ions and the optimum membrane composition providing the best potentiometric characteristics was determined as 30% PVC, 67% plasticizer (dibutylphthalate), 3% ionophore (Ni-sac). It was observed that the developed carbonate selective PVC-membrane electrode exhibited linear response towards carbonate ions in the concentration range of 1.0×10-2-1.0×10-6 M with a slope of -24±2 mV/decade in the presence of the common anionic species. The detection limit and average response time of the electrode were also determined as 6.1×10-7 M and 12 seconds, respectively. The potentiometric response of the carbonate selective PVC-membrane electrode was independent from the pH of the test solution in the pH range of 5.0-9.0. In addition, the electrode had a life-span of 8 weeks. The proposed PVC-membrane carbonate selective electrode was applied successfully for the quantitative carbonate determination in various commercially available mineral water samples.
- Publication
Karaelmas Science & Engineering Journal / Karaelmas Fen ve Mühendislik Dergisi, 2016, Vol 6, Issue 2, p283
- ISSN
2146-4987
- Publication type
Article