复合式氧微电极结构参数对于性能的影响  

Effect of structural parameters on the performances of a combined oxygen microelectrode

作　　者：周小红[1] 施汉昌[1] 邱玉琴[1] 刘加恩[1] 

机构地区：[1]清华大学环境科学与工程系,环境模拟与污染控制国家重点联合实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2008年第6期991-994,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50478009);国家“九七三”基础研究计划资助项目(2005CB724901);国家教育部博士点基金资助项目(20040003040)

摘　　要：为了研究简单可行的复合式氧微电极制作方法,并优化氧微电极的设计,通过统计学分析,确定了影响氧微电极性能的主要结构特征参数。拉制出来的氧微电极对测试样品中的溶解氧浓度的线性响应相关系数为0.998,氧气体积的最小分辨率为0.037%,残余电流为(33±2)pA,搅动影响4%,响应时间3.5 s。简单相关分析和典型相关分析表明氧透过性膜厚度与响应时间的相关性最为显著,而阴极工作电极直径以及工作阴极尖端与电极尖端的距离对电极性能的影响不大。The performance and structural parameters of a combined oxygen microelectrode were analyzed statistically to develop a simple fabrication procedure for optimized design. The performance was correlated to the structural parameters by a statistical analysis. The sensor has a good linear response for the various oxygen partial pressures. The sensor＇s guaranteed oxygen volume resolution is 0. 037%, the zero current is （33 ± 2） pA, the stirring effect is 4%, and the response time is 3.5 s. A simple correlation analysis and a canonical correlation analysis show that oxygen permeable membrane thickness most strongly correlated to the sensor response time, while the cathode diameter and the distance between the cathode and the sensor tip does not strongly correlate with the sensor performance.

关 键 词：微电极 溶解氧 简单相关分析 典型相关分析 

分 类 号：X505[环境科学与工程—环境工程]