新型PVC膜锌离子选择性电极研究  

Study on new zinc(Ⅱ)-selective PVC membrane electrode

作　　者：刘新露[1] 王莹[1] 谯康全[1] 吴宇[1] 苟亚光[1] 

机构地区：[1]四川理工学院化学与制药工程学院,四川自贡643000

出　　处：《中国测试》2013年第6期46-49,共4页China Measurement & Test

基　　金：四川理工学院科研基金项目(2010XJKYL004);四川理工学院大学生创新基金项目(CX20111310)

摘　　要：研制以3,5-二溴水杨醛二缩邻苯二胺为中性载体的新型聚氯乙烯（PVC）膜锌离子选择性电极。该电极对Zn2＋具有良好的选择性,呈现出近能斯特电位响应,响应线性范围为1.0×10-5~1.0×10-1mol/L,检出限8.0×10-6mol/L,斜率为36.8mV/dec。电极的响应时间为55s,在连续使用一个月后其电位响应性能未见下降。电极的响应机理通过交流阻抗技术进行初步研究,可应用于工业废水、饲料、药品等样品中锌含量的检测。A new PVC membrane electrode based N,N′-bis（3,5-dibromosalicylaldehyde）-1,2-phenylenediamine as the neutral carrier was fabricated. This electrode displays a good selectivity to Zn2＋and exhibits a near-Nernstian potential response for Zn2＋over a linear range of 1.0×10-5-1.0 ×10-1mol/L with a detection limit of 8.0 ×10-6mol/L and a slope of 36.8 mV/decade. The response time of the electrode is 55 s and it can be used at least for one month without considerable divergence in potential. The response mechanism was primarily discussed in view of the A.C. impedance technique. The electrode can be applied to determine zinc in real samples such as industrial effluent,feed and medicine.

关 键 词：PVC膜 中性载体 3 5-二溴水杨醛二缩邻苯二胺 Zn2+ 离子选择性电极 

分 类 号：O657.15[理学—分析化学] O614.241[理学—化学]