摘要
在电聚合制备普鲁士蓝(PB)膜修饰铂丝电极基础上,引入纳米粒子采用聚乙烯醇缩丁醛(PVB)为辅助固酶膜基质制成一种新型的葡萄糖传感器。系统地研究了膜修饰和测试条件对传感器性能的影响,结果表明传感器的最佳工作电位是0.23 V,测试液的最适宜的pH值为7.0,最佳的测试温度35℃。在选定的工作条件下,传感器的测定范围为1×10^(-7)～4.8×10^(-6)mol/L,检出下限为4×10^(-8) mol/L,响应时间为30 s,灵敏度较当前的葡萄糖传感器有明显的提高。
A glucose sensor prepared by immobilizing of. glucose oxidase and nanoparticles in polyvinyl butyral (PVB) on a Prussian blue-modified platinium electrode was described. The properties of the sensor were investigated. The result show that the optimum detection potential is 0. 23 V (vs. SCE) , the optimum pH is 7.5, and the optimum temperature is 35℃. Under selective conditions the current response is linear in the range of 1×10^(-7)～4. 8×10^(-6) mol/L, the detection limit is 4×10^(-8) mol/L and the response time is 30s. The high sensitivity is owing to the electrocatalytie effect of Prussian blue for the electroreduction of hydrogen peroxide.
出处
《化学传感器》
CAS
2004年第2期57-61,共5页
Chemical Sensors
基金
教育部优秀青年教师资助项目(教人司(2002)40)
重庆市自然科学基金资助课题(2002-7477)
