An integrated system for photo-accumulation (photoreduction) and sensing, based on a Zr/ZrO₂ electrode, has been developed for the detection of trace heavy metals. The nanostructuring of the Zr/ZrO₂ electrode was achieved by anodizing, which produced a nanotubular structure. Solutions containing Cd(II), Pb(II), Cu(II) and Hg(II) were used for analysis. Linear calibration plots were obtained in the concentration ranges from 8×10^-8 to 10^-5 M for Pb(II), 5×10^-8 to 2×10^-6 M for Cu(II) and 4×10^-8 to 10^-5 M for Hg(II).

中文翻译：

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用于重金属离子检测的Zr / ZrO ₂纳米管电极

基于Zr / ZrO ₂电极的用于光聚集（光还原）和感测的集成系统已经开发出来，用于检测痕量重金属。Zr / ZrO ₂电极的纳米结构是通过阳极氧化实现的，产生了纳米管结构。使用含有Cd（II），Pb（II），Cu（II）和Hg（II）的溶液进行分析。在浓度范围，获得的线性校准曲线从8×10 ^-8至10 ^-5 M表示铅（II），5×10 ^-8〜2×10 ^-6 M代表铜（II）和4×10 ^-8至Hg（II）为10 ^-5M。