Chemical and Environmental Engineering Institute, Dalian University, Dalian 116622, China; Environmental Micro Total Analysis Lab, Dalian University, Dalian 116622, China.
Department of Physics, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States.
Mar Pollut Bull. 2019 Jul;144:20-27. doi: 10.1016/j.marpolbul.2019.04.063. Epub 2019 May 9.
By combination of miniaturization potential of digital microfluidics (DMF) and sensitivity of fluorescence probe, an integrated sensor device has been initially constructed for mercury detection in coastal waters. The actuation feature of the detecting target, seawater droplet, which remains unclear, was basically explored. To overcome a potential risk of driven failure, induced by diversity ion ingredients in seawater, a feedback control loop was included into control system. Analyzing method for coastal waters was well established on DMF, which showed satisfied stability and selectivity in Hg sensing under high salinity condition, with the sensitivity of Hg at the parts per billion level and total testing time less than 20s. With the advantages of being fast, amenable to automation and low cost, this device is promising for the formation of simple and rapid sensor device, especially for a routine monitoring and emergency detection of Hg/or other metals in coastal waters.
通过数字微流控（DMF）的微型化潜力和荧光探针的灵敏度相结合，我们初步构建了一种集成传感器设备，用于检测沿海水中的汞。该设备对检测目标——海水液滴的驱动特征进行了基本探索，因为海水液滴中的成分复杂，可能存在潜在的驱动故障风险，所以我们在控制系统中加入了反馈控制回路。我们在 DMF 上建立了一种用于沿海海水的分析方法，该方法在高盐度条件下对 Hg 具有良好的稳定性和选择性，Hg 的灵敏度达到了十亿分之几的水平，总检测时间小于 20s。该设备具有快速、易于自动化和低成本的优点，有望形成简单快速的传感器设备，特别适用于沿海地区 Hg 或其他金属的常规监测和应急检测。
