Colorimetric Detection of Trace Arsenic(iii) in Aqueous Solution Using Arsenic Aptamer and Gold Nanoparticles

DOI PDF 被引用文献5件
  • Shenshan Zhan
    ASchool of Environmental Science and Engineering, and Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, and School of Agriculture and Biology, and Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai 200240, China.
  • Minglei Yu
    BSchool of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
  • Jing Lv
    ASchool of Environmental Science and Engineering, and Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, and School of Agriculture and Biology, and Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai 200240, China.
  • Lumei Wang
    ASchool of Environmental Science and Engineering, and Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, and School of Agriculture and Biology, and Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai 200240, China.
  • Pei Zhou
    ASchool of Environmental Science and Engineering, and Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, and School of Agriculture and Biology, and Bor S. Luh Food Safety Research Center, Shanghai Jiao Tong University, Shanghai 200240, China.

書誌事項

公開日
2014-04-10
権利情報
  • https://doi.org/10.1071/journalslicense
DOI
  • 10.1071/ch13512
公開者
CSIRO Publishing

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説明

<jats:p>In this study, trace arsenic(iii) (AsIII) in aqueous solution was detected by applying a classical aptamer-based gold nanoparticles colorimetric sensing strategy. An arsenic aptamer was used as a sensing probe and gold nanoparticles as a colorimetric indicator. In the absence of AsIII, the gold nanoparticles were stabilised by the arsenic aptamer and remained dispersed at high NaCl concentrations, displaying a red solution. Contrarily, in the presence of AsIII, the gold nanoparticles were prone to aggregation, owing to the formation of aptamer–AsIII complex between the arsenic aptamer and AsIII, and thus exhibited a blue solution. By monitoring the colour change, a simple and fast colorimetric assay for AsIII was established with a detection range of 1.26–200 ppb and a detection limit of 1.26 ppb. Because this colorimetric assay only involves common reagents and can be assessed visually, it holds great potential for arsenic(iii) monitoring in environment-related and other applications.</jats:p>

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