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A Simple Paper-Based Colorimetric Device for Rapid Mercury(II) Assay

Scientific reports, 2016-08, Vol.6 (1), p.31948-31948, Article 31948 [Peer Reviewed Journal]

Copyright Nature Publishing Group Aug 2016 ;Copyright © 2016, The Author(s) 2016 The Author(s) ;ISSN: 2045-2322 ;EISSN: 2045-2322 ;DOI: 10.1038/srep31948 ;PMID: 27554633

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  • Title:
    A Simple Paper-Based Colorimetric Device for Rapid Mercury(II) Assay
  • Author: Chen, Weiwei ; Fang, Xueen ; Li, Hua ; Cao, Hongmei ; Kong, Jilie
  • Subjects: Color ; Colorimetry ; Contamination ; Enzymes ; Fiber optics ; Mercury ; Nanomaterials ; Nanoparticles ; Oxidation ; Platinum ; Sensors ; Smartphones
  • Is Part Of: Scientific reports, 2016-08, Vol.6 (1), p.31948-31948, Article 31948
  • Description: Contamination of the environment by mercury(II) ions (Hg(2+)) poses a serious threat to human health and ecosystems. Up to now, many reported Hg(2+) sensors require complex procedures, long measurement times and sophisticated instrumentation. We have developed a simple, rapid, low cost and naked-eye quantitative method for Hg(2+) environmental analysis using a paper-based colorimetric device (PCD). The sample solution to which platinum nanoparticles (PtNPs) have been added is dispensed to the detection zone on the PCD, where the 3,3,5,5-tetramethylbenzidine (TMB) substrate has been pre-loaded. The PtNPs effect a rapid oxidization of TMB, inducing blue colorization on the PCD. However, Hg(2+) in the solution rapidly interact with the PtNPs, suppressing the oxidation capacity and hence causing a decrease in blue intensity, which can be observed directly by the naked eye. Moreover, Hg(2+) at concentrations as low as 0.01 uM, can be successfully monitored using a fiber optic device, which gives a digital readout proportional to the intensity of the blue color change. This paper-based colorimetric device (PCD) shows great potential for field measurement of Hg(2+).
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2045-2322
    EISSN: 2045-2322
    DOI: 10.1038/srep31948
    PMID: 27554633
  • Source: PubMed Central
    ProQuest Central
    DOAJ Directory of Open Access Journals
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