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Han S, Liu X, Wang L, Wang Y, Zheng G. An efficient protocol to use feedback-controlling digital microfluidic fluorimetric sensor for detection of mercury (II) in coastal seawaters. MethodsX 2019; 6:1443-1453. [PMID: 31289722 PMCID: PMC6593185 DOI: 10.1016/j.mex.2019.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 06/11/2019] [Indexed: 10/26/2022] Open
Abstract
Mercury ion is a highly toxic anthropogenic pollutants and has serious well-known effects on human. There is an ever-growing demand for convenient detection of mercury driven contaminants in environment, including coastal seawater. However, most of the reported methods are instrument-based and are not easy for portable detection. Our protocol described an efficient Digital Microfluidics method for detecting mercury in coastal seawater samples. It combined the miniaturization/automation potential of digital microfluidics and the sensitivity of fluorescence probe. To overcome a potential risk of driven failure, induced by diversity ion ingredients in seawater, a feedback control loop was included into control system. The method showed satisfied stability and selectivity in Hg sensing under high salinity condition, with the sensitivity of Hg2+ at the parts-per-billion level and total testing time of less than 20 s. With the advantages of being fast, amenable to automation and low cost, this protocol 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.
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Affiliation(s)
- Shuang Han
- Chemical and Environmental Engineering Institute, Dalian University, Dalian, 116622, China.,Environmental Micro Total Analysis Lab, Dalian University, Dalian, 116622, China
| | - Xianming Liu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116600, China.,Environmental Micro Total Analysis Lab, Dalian University, Dalian, 116622, China
| | - Lin Wang
- Chemical and Environmental Engineering Institute, Dalian University, Dalian, 116622, China.,Environmental Micro Total Analysis Lab, Dalian University, Dalian, 116622, China
| | - Yunhua Wang
- Medical School, Dalian University, Dalian, 116622, China.,Environmental Micro Total Analysis Lab, Dalian University, Dalian, 116622, China
| | - Guoxia Zheng
- Chemical and Environmental Engineering Institute, Dalian University, Dalian, 116622, China.,Environmental Micro Total Analysis Lab, Dalian University, Dalian, 116622, China
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