中性载体可咯化合物应用于银离子电位传感器的研究

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

研制了一种以5,10,15-三(五氟苯基)可咯[H3(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Hg2+、Pb2+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。

A electrode was prepared with a PVC membrane using 5, 10, 15-tris （pentafluorophenyl） eorrole as an eleetroactive material, 2-nitrophenyl octyl ether （o-NPOE） as a plasticizer and sodium tetraphenylbomte as an additive in the percentage ratio of 3 ： 3 ： 62 ： 32 （corrole ： NaTPB ： o-NPOE ： PVC, w ： w ）. The electrode exhibited linear response with a near Nernstian slope of 54.8 mV/deeade 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 determination of silver in real ore samoles with satisfactory results.