摘要
采用电聚合方法制备了聚氨基苯硼酸（PABA）膜修饰玻碳电极的新型pH传感器。利用红外图谱和交流阻抗谱对PABA膜的修饰进行了表征。考察了该修饰电极在不同pH的Britton-Robinson（BR）缓冲溶液中的循环伏安响应。结果表明，阴极还原峰电位与底液pH具有良好的线性关系，线性范围为pH2.01～8.00，能斯特响应斜率为-153mV／pH。将该修饰电极用于弱酸及中性实际样品pH测定，结果满意。
A novel pH - sensitive sensor was fabricated based on a poly （aniline boronic acid） （PABA） modified glassy carbon electrode （GCE） by electro-polymerization. The PABA film was characterized by infrared spectroscopy and electrochemical impedance spectroscopy. The cyclic voltammetric response of the pH sensor in different pH of BR buffer solution were investigated, and the results indicated that the cathodic peak potential of PABA film modified electrode showed a good linear response in the pH range of 2.01 ～ 8.00 with a super - Nernst response （ - 153mV/pH ）. The sensor had good reproducibility, stability and low sensitivities for different ions. In addition, the pH sensor was used for the pH determination of weak acid and neutral real samples with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2014年第4期388-391,共4页
Chinese Journal of Analysis Laboratory
基金
国家自然科学基金项目(21105062
21175091)资助
关键词
聚氨基苯硼酸
pH传感
电化学
循环伏安法
Poly（aniline bornic acid）
pH sensor
Electrochemistry
Cyclic voltammetry
