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A novel approach for in situ monitoring of Zn in citrus plants using two-step square-wave anodic stripping voltammetry

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Abstract

This study presents in situ detection of Zn2+ using a novel two-step square-wave anodic stripping voltammetry (SWASV)-based needle-type microsensor for citrus plant applications. A double-barrel bismuth/platinum (Bi/Pt) microelectrode was fabricated with a solid metal tip (~110 urn), which was durable enough to penetrate the thick skin of the citrus leaves and sensitive enough to detect ppb changes in Zn2+ concentration using SWASV. The microelectrode tip size was also determined to reduce mass transport limitation and improve limit of detection. Overall, the developed Bi/Pt microelectrode successfully measured Zn2+ concentrations within the vascular bundle of citrus plants.

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ACKNOWLEDGMENTS

This work is supported by Citrus Disease Research and Extension (CDRE) (grant no. 2016-70016-24828/project accusation no. 1008984) from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the US Department of Agriculture.

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Authors and Affiliations

  1. Department of Civil, Environmental, and Construction Engineering, University of Central Florida, Orlando, Florida, 32816, USA

    Jared Church & Woo Hyoung Lee

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  1. Jared Church
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  2. Woo Hyoung Lee
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Correspondence to Woo Hyoung Lee.

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The supplementary material for this article can be found at https://doi.org/10.1557/mrc.2018.61

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Church, J., Lee, W.H. A novel approach for in situ monitoring of Zn in citrus plants using two-step square-wave anodic stripping voltammetry. MRS Communications 8, 404–410 (2018). https://doi.org/10.1557/mrc.2018.61

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