Lin Wen-Chi, Li Zhongrui, Burns Mark A
Department of Chemical Engineering, University of Michigan , 3074 H. H. Dow, 2300 Hayward Street, Ann Arbor, Michigan 48109-2136, United States.
Department of Earth and Environmental Science, University of Michigan , 2534 C. C. Little Building, 1100 North University Avenue, Ann Arbor, Michigan 48109-1005, United States.
Anal Chem. 2017 Sep 5;89(17):8748-8756. doi: 10.1021/acs.analchem.7b00843. Epub 2017 Aug 17.
Leakage of lead and other heavy metals into drinking water is a significant health risk and one that is not easily detected. We have developed simple sensors containing only platinum electrodes for the detection of heavy metal contamination in drinking water. The two-electrode sensor can identify the existence of a variety of heavy metals in drinking water, and the four-electrode sensor can distinguish lead from other heavy metals in solution. No false-positive response is generated when the sensors are placed in simulated and actual tap water contaminated by heavy metals. Lead detection on the four-electrode sensor is not affected by the presence of common ions in tap water. Experimental results suggest the sensors can be embedded in water service lines for long-time use until lead or other heavy metals are detected. With its low cost (∼$0.10/sensor) and the possibility of long-term operation, the sensors are ideal for heavy metal detection of drinking water.
铅和其他重金属泄漏到饮用水中会带来重大健康风险，且这种风险不易察觉。我们开发了仅含铂电极的简单传感器，用于检测饮用水中的重金属污染。双电极传感器能够识别饮用水中多种重金属的存在，四电极传感器则可以在溶液中区分铅和其他重金属。当传感器置于受重金属污染的模拟自来水和实际自来水中时，不会产生误阳性响应。四电极传感器对铅的检测不受自来水中常见离子的影响。实验结果表明，这些传感器可以嵌入供水管道中长期使用，直至检测到铅或其他重金属。由于成本低廉（每个传感器约0.10美元）且具备长期运行的可能性，这些传感器是检测饮用水中重金属的理想选择。
