Abstract A synthesized Schiff base 2-acetylthiophene semicarbazone (3) was used for the preparation of Ni2+ selective polyvinyl chloride (PVC) membrane electrode. The prepared electrode with the optimized composition, PVC:3:sodium tetraphenylborate:di-n-butylphthalate as 33:6:3:58 exhibited a Nernstian response over the working range of 5.0 × 10−6–5.0 × 10−2 mol l−1 with a slope of 29.0 ± 0.3 mV/concentration. The electrode showed good selectivity towards Ni2+ with respect to several metal ions in the pH range of 2.5–10.0 in <15 s with a detection limit of 4.7 × 10−6 mol l−1. The electrode showed the additional benefit of working in partially nonaqueous media having up to 15% (v/v) methanol or ethanol. This electrode was also successfully applied in Ni2+ ion potentiometric titration with ethylenediaminetetraacetic acid as an indicator electrode.

中文翻译：

---

噻吩基席夫碱配体作为 Ni(II) 选择性聚氯乙烯膜电极的离子载体

摘要 采用合成的席夫碱2-乙酰噻吩缩氨基脲(3)制备Ni2+选择性聚氯乙烯(PVC)膜电极。制备的具有优化成分 PVC:3:四苯基硼酸钠:邻苯二甲酸二正丁酯为 33:6:3:58 的电极在 5.0 × 10−6–5.0 × 10−2 mol l 的工作范围内表现出能斯特响应−1，斜率为 29.0 ± 0.3 mV/浓度。该电极在 2.5-10.0 的 pH 范围内在 <15 秒内对几种金属离子显示出对 Ni2+ 的良好选择性，检测限为 4.7 × 10-6 mol l-1。该电极显示出在含有高达 15% (v/v) 甲醇或乙醇的部分非水介质中工作的额外好处。该电极还成功应用于以乙二胺四乙酸为指示电极的Ni2+离子电位滴定。