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Ratio fluorescence test strip visualized by amino-functionalized metal-organic framework for rapid sensing of glyphosate.
- Source :
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Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2023 Sep 05; Vol. 297, pp. 122673. Date of Electronic Publication: 2023 Mar 31. - Publication Year :
- 2023
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Abstract
- As glyphosate is a broad-spectrum herbicide extensively used in agriculture worldwide, rapid glyphosate detection is essential for food safety and human health. Herein, a ratio fluorescence test strip was prepared and coupled with an amino-functionalized bismuth-based metal-organic framework (NH <subscript>2</subscript> -Bi-MOF) that bonded with copper ion for rapid visualization and determination of glyphosate. NH <subscript>2</subscript> -Bi-MOF had excellent fluorescence performance, and the copper ion, a Lewis acid, was selected as the quencher. The strong chelation of glyphosate with copper ion and its quick interaction with NH <subscript>2</subscript> -Bi-MOF would turn on the fluorescence signal, thus enabling the quantitative sensing of glyphosate, with a linear range of 0.10-200 µmol L <superscript>-1</superscript> , and recoveries between 94.8% and 113.5%. The system was then expanded to a ratio fluorescence test strip, in which the fluorescent ring sticker was set as a binding-in self-calibration to reduce errors from the angle and light dependency. The method realized the visual semi-quantitation referring to a standard card, as well as the ratio quantitation using the gray value output with LOD of 0.82 µmol L <superscript>-1</superscript> . And the as-developed test strip was accessible, portable, and reliable, thus offering a platform for the rapid on-site detection of glyphosate and other residual pesticides.<br />Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2023 Elsevier B.V. All rights reserved.)
- Subjects :
- Humans
Agriculture
Bismuth
Glyphosate
Copper
Metal-Organic Frameworks
Subjects
Details
- Language :
- English
- ISSN :
- 1873-3557
- Volume :
- 297
- Database :
- MEDLINE
- Journal :
- Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
- Publication Type :
- Academic Journal
- Accession number :
- 37054567
- Full Text :
- https://doi.org/10.1016/j.saa.2023.122673