Electrochemical sensors can be used to create portable, attractive, high-sensitivity devices to detect heavy ions in water at a reasonable cost. A novel method of measuring local redox on an electrode using the differential reflectivity measured on an approximately 6 micron diameter spot using a He/Ne laser beam is described. Field focusing and electrode modification enhance the sensitivity, making the method ideal for miniaturization and multiplexing multiple analytes on a monolith electrode. The method is demonstrated by detecting Pb, Hg, and As ions at ppb and ppt levels.

中文翻译：

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使用光学电化学探针在微点电极上检测重金属离子

电化学传感器可用于制造便携式，有吸引力的高灵敏度设备，以合理的成本检测水中的重离子。描述了一种新颖的方法，该方法使用He / Ne激光束在约6微米直径的光斑上测量的差分反射率来测量电极上的局部氧化还原。场聚焦和电极修饰提高了灵敏度，使该方法非常适合在单块电极上小型化和多路复用多种分析物。该方法通过检测ppb和ppt水平的Pb，Hg和As离子来证明。