Department of Chemistry, School of Sciences, Tarbiat Modarres University, P.O. Box 14115-111, Tehran, Iran.
Talanta. 2003 Jul 4;60(4):853-9. doi: 10.1016/S0039-9140(03)00147-4.
A PVC membrane vanadyl (VO(2+)) ion-selective electrode was constructed using 1,8-diaminonaphthalen (DAN) as a neutral carrier. The electrode shows good Nernstian response for VO(2+) ions over a wide concentration range (1.0x10(-1)-1.0x10(-5) M). The optimum composition of the membrane was 55 wt.% poly(vinylchloride), 35 wt.% 2-nitrophenyl octyl ether (NPOE), 5 wt.% ionophore, and 5 wt.% potassium tetrakis(p-chlorophenyl)borate (KTpClPB). It has relatively fast response time and can be used at least for 5 weeks without any considerable divergence in potentials. The proposed electrode revealed relatively good selectivity for VO(2+) over wide variety of other metal ions. The electrode was used for the potentiometric titration of VO(2+) ions with EDTA.
采用 1,8-二氨基萘（DAN）作为中性载体，构建了一种 PVC 膜钒（VO(2+)）离子选择性电极。该电极对 VO(2+)离子表现出良好的 Nernstian 响应，检测范围较宽（1.0x10(-1)-1.0x10(-5) M）。膜的最佳组成是 55wt.%聚氯乙烯、35wt.%2-硝基苯基辛基醚（NPOE）、5wt.%离子载体和 5wt.%四(对氯苯基)硼酸钾（KTpClPB）。它具有相对较快的响应时间，至少可以在 5 周内使用，而不会导致电位出现明显偏差。与其他多种金属离子相比，该电极对 VO(2+)具有相对较好的选择性。该电极可用于 EDTA 对 VO(2+)离子的电位滴定。
