改性PVC膜电极性能的研究  

STUDY OF ELECTRODE WITH MODIFIED PVC MEMBRANE

作　　者：廖永忠[1] 周定[2] 

机构地区：[1]华南理工大学应用化学系 [2]哈尔滨工业大学应用化学系

出　　处：《华南理工大学学报（自然科学版）》1993年第4期118-125,共8页Journal of South China University of Technology(Natural Science Edition)

摘　　要：本文描述了端基为季胺盐的聚氯乙烯(PVC—QA)的合成,并以此做为十二烷基苯磺酸根离子的选择性电极敏感膜,电极响应的线性范围是5.6×10^(-6)～5.5×10^(-3)mol/l,响应斜率是52mV/Pa,漂移小于0.5mV/h,pH适合范围是6.5～8.5。本文还从化学热力学的角度出发探讨了以PVC—QA为敏感膜和以(PVC+游离季铵盐)为敏感膜在性能和机理方面的不同。This paper describes the syntheses of PVC with quaternary amine group asend group(PVC—QA).A selective electrode is made with PVC—QA as sensitivemembrane to Dodecyl—benzene—sulfonate(DBS),and the linear range is 5.6×10^(-6)—5.5×10^(-3)mol/1,the slope is 52mV/Pa,the drift is less than 0.5mV/h,pH suitingrange is 6.5～8.5.The difference of properties of electrodes and mechanism betweenPVC—QA and the type(PVC+Quaternay amine)as sensitive membrane is discussedin terms of chemical thermodynamics.

关 键 词：电极 聚氯乙烯膜 离子选择电极 

分 类 号：O657.15[理学—分析化学]