Metal ion enrichment using organic nanocrystal coatedmicrofluidic paper analytical devices to achieve highly sensitive colorimetric detection

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Low sensitivity is a common issue in the colorimetric of microfluidic paper analytical device (μPADs) for heavy metal ion detection. In this work, we demonstrated the utilization of insoluble organic nanocrystal (NCs) coated on μPADs both for reagent and sample enrichment. By applying a large volume of aqueous metal solution, NCs absorbed Fe2+ until it reached high capacity, leading to an obvious color change even at ppb-level. NCs coated-μPADs successfully detected 5.4 ppb (0.1 μM) of Fe2+ which meets the criteria to detect the ion in a reference river water sample (6.9 ppb), a sensitivity higher than other comparable sensing device.

Original languageEnglish
Title of host publicationMicroTAS 2020 - 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences
PublisherChemical and Biological Microsystems Society
Pages567-568
Number of pages2
ISBN (Electronic)9781733419017
Publication statusPublished - 2020
Event24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2020 - Virtual, Online
Duration: 2020 Oct 42020 Oct 9

Publication series

NameMicroTAS 2020 - 24th International Conference on Miniaturized Systems for Chemistry and Life Sciences

Conference

Conference24th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2020
CityVirtual, Online
Period20/10/420/10/9

Keywords

  • Colorimetric
  • Organic Nanocrystal
  • Reagent Accumulation
  • Sample Accumulation
  • Sensitivity

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Bioengineering
  • Chemistry(all)
  • Control and Systems Engineering

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