AGH University of Science and Technology, Faculty of Material Science and Ceramics, Mickiewicza 30, PL-30059 Cracow, Poland.
Talanta. 2012 May 15;93:424-7. doi: 10.1016/j.talanta.2012.02.013. Epub 2012 Feb 11.
This study developed new types of all-solid-state ion-selective electrodes based on carbon black (CB). The electrodes were obtained basing on two methods. The first method concerned the addition of the CB as an intermediate layer between an ionophore-doped solvent polymeric membrane and an electrical conductor. The second one used the CB as a polymeric membrane component. The stability of the electrical potential of the new solid-contact electrodes was examined by performing the current-reversal chronopotentiometry and the influence of the interfacial water film was assessed by the potentiometric aqueous-layer test. The performance of the new electrodes was evaluated by the determining K(+) with an ion-selective membrane that contained the well known valinomycin ion carrier. The new electrodes had a Nernstian slope, a high stability, the reproducibility of the standard potential values and a very small potential drift.
本研究基于碳黑 (CB) 开发了新型全固态离子选择性电极。这些电极是通过两种方法获得的。第一种方法是将 CB 作为离子载体掺杂溶剂聚合物膜和电导体之间的中间层添加。第二种方法则是将 CB 用作聚合物膜的组成部分。通过进行电流反向计时电位法来检查新固态接触电极的电势能稳定性，并通过电位水层测试评估界面水膜的影响。通过使用含有知名缬氨霉素离子载体的离子选择性膜来测定 K(+)，评估了新电极的性能。新型电极具有能斯特斜率、高稳定性、标准电位值的重现性以及非常小的电位漂移。
