In situ deposition of bismuth on pre-anodized screen-printed electrode for sensitive determination of Cd 2+ in water and rice with a portable device.

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  • Additional Information
    • Source:
      Publisher: Nature Publishing Group Country of Publication: England NLM ID: 101563288 Publication Model: Electronic Cited Medium: Internet ISSN: 2045-2322 (Electronic) Linking ISSN: 20452322 NLM ISO Abbreviation: Sci Rep Subsets: MEDLINE
    • Publication Information:
      Original Publication: London : Nature Publishing Group, copyright 2011-
    • Subject Terms:
      Cadmium*/analysis ; Oryza*/chemistry ; Bismuth*/chemistry ; Bismuth*/analysis ; Electrodes* ; Electrochemical Techniques*/methods ; Electrochemical Techniques*/instrumentation; Water/chemistry ; Water/analysis ; Water Pollutants, Chemical/analysis ; Limit of Detection ; Food Contamination/analysis
    • Abstract:
      Electrochemical detection is favorable for the rapid and sensitive determination of heavy metal cadmium. However, the detection sensitivity needs to be further improved, and a portable, low-cost device is needed for on-site detection. Herein, an in-situ bismuth modified pre-anodized screen-printed carbon electrode (SPCE) was developed for Cd 2+ determination by square wave anodic stripping voltammetry (SWASV). The in-situ bismuth modification enhances the enrichment of Cd 2+ , and together with pre-anodization improve the electron transfer rate of electrode, thus enhancing the detection sensitivity. The electrode modification method combines pre-anodization and in-situ bismuth deposition, which is very easy and effective. Furthermore, a self-made PSoC Stat potentiostat coupled with a stirring device was fabricated for portable and low-cost electrochemical detection. After comprehensive optimization, the developed method can reach a testing time of 3 min, a detection limit of 3.55 μg/L, a linear range of 5-100 μg/L, and a recovery rate of 91.7-107.1% in water and rice samples for Cd 2+ determination. Therefore, our method holds great promise for the rapid, sensitive and on-site determination of Cd 2+ in food samples.
      (© 2024. The Author(s).)
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    • Grant Information:
      32371521 National Natural Science Foundation of China; CGZ07001 start-up funds for scientific research of high-level talents in Foshan University
    • Contributed Indexing:
      Keywords: Bismuth modification; Cd2+; Electrochemical sensor; Portable device; Pre-anodization
    • Accession Number:
      00BH33GNGH (Cadmium)
      U015TT5I8H (Bismuth)
      059QF0KO0R (Water)
      0 (Water Pollutants, Chemical)
    • Publication Date:
      Date Created: 20240808 Date Completed: 20240808 Latest Revision: 20240813
    • Publication Date:
      20240813
    • Accession Number:
      PMC11310196
    • Accession Number:
      10.1038/s41598-024-69626-7
    • Accession Number:
      39117723