中性载体可咯化合物应用于银离子电位传感器的研究

研制了一种以5,10,15-三(五氟苯基)可咯H_3(tpfc)]为活性组分物质、以邻硝基苯辛醚o-NPOE为增塑剂、以四苯硼钠为亲脂性大阴离子添加剂的PVC膜电极(4种物质的质量比为3:3:62:32),电极能斯特斜率为54.8 mV/decade、工作浓度范围为5.1×10~(-6)～0.1 mol/L,pH为4.0～8.0,响应时间不超过30 s,该电极对银离子能抵抗来自Hg~(2+)、Pb~(2+)等离子干扰,表现出较高的选择性.这种传感器可用于对实际矿石样品进行检测.

Study on corrole as a neutral carrier for a silver ion-selective electrode

A electrode was prepared with a PVC membrane using 5, 10, 15-tris (pentafluorophenyl) corrole as an electroactive material, 2-nitrophenyl octyl ether (o-NPOE) as a plasticizer and sodium tetraphenylborate as an additive in the percentage ratio of 3 : 3 : 62 : 32 (corrole : NaTPB : o-NPOE : PVC, w : w). The electrode exhibited linear re-sponse with a near Nernstian slope of 54.8 mV/decade within the concentration range of 5.1 × 10~(-6) to 0.1 mol/L for silver ions, with a working pH range from 4.0 to 8.0 and the response time of less than 30 s. The electrode is highly selective for Ag(Ⅰ) ions over a large number of cations like Hg~(2+) and Cd~(2+) . The sensor was applied to the determi-nation of silver in real ore samples with satisfactory results.