以芴的衍生物为载体的PVC膜铜(Ⅱ)离子选择性电极的研究  

Copper(Ⅱ)Ion-selective Electrode Based on a Fluorene Derivative

作　　者：颜振宁[1] 侯彦辉[1] 周稚仙[1] 杜晨霞[1] 吴养洁[1] 

机构地区：[1]郑州大学化学系,河南郑州450052

出　　处：《分析测试学报》2005年第3期104-106,共3页Journal of Instrumental Analysis

基　　金：郑州大学青年骨干教师基金资助项目

摘　　要：报道了4,5_二氮杂_9_对甲氧基亚氨基芴为铜(Ⅱ)离子载体的聚氯乙烯(PVC)膜电极的研制;研究了电极膜中增塑剂种类及载体和离子定域体(KTpClPB)含量对电极性能的影响,得到了电极膜中各组分的最佳质量比为m(载体)∶m(PVC)∶m(o_NPOE)∶m(KTpClPB)=2.0∶32.3∶65.6∶0.1;该选择电极对铜(Ⅱ)离子有良好的能斯特响应性能和较高的选择性,线性响应范围为10-6～10-2mol/L,斜率为29.9mV/decade;电极具有优良的重复性和稳定性,可用于电位滴定Cu2+的指示电极和水体中铜离子的测定。A newcopper(Ⅱ)ion_selective polyvinyl chloride membrane electrode prepared by using4,5_diˉaza_9_(4_methoxyphenyl)imino fluorine as the ionophore is presented.The influences of the nature of plastiˉcizers and the amounts ofthe incorporated ionophore and ionic additive(KTpClPB)on the response characterisˉtics of the electrode were studied.The electrode contains2.0%ionophore,32.3%PVC,65.6%o_NPOE and0.1%KTpClPB,respectively.The Cu 2+ -PVC electrode exhibited Nernstian response and fairly good selectivity with the response slope of29.9mV/decade in the range of10 -6 -10 -2 mol/L.The electrode showed good potential stability and reproducibility.The electrode could be used as the indicator electrode in potential titration of Cu 2+ and for the determination of Cu 2+ in water samples.

关 键 词：4 5-二氮杂-9-对甲氧基亚氨基芴 离子选择电极 铜离子 

分 类 号：O657.15[理学—分析化学] O614.121[理学—化学]