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Issue 4, 2020
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The construction of a CND/Cu2+ fluorescence sensing system for the ultrasensitive detection of glyphosate

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Abstract

In this work, a coumarin derivative (CND) was synthesized by a one-step condensation reaction and exhibited selective fluorescence quenching by Cu2+. Glyphosate with amine and carboxylate groups provided strong chelation for Cu2+ from the CND/Cu2+ system, leading to fluorescence recovery. In this strategy, a CND/Cu2+ fluorescence sensing system was constructed to achieve the quantitative analysis of glyphosate. Under the optimized experimental conditions, a good linear relationship between CND and Cu2+ of glyphosate concentration in the range from 0.02 μg mL−1 to 1.50 μg mL−1 was obtained and the correlation coefficient was 0.99. The detection limit was calculated to be 18.30 ng mL−1 (S/N = 3) and presented relative advantages compared with other methods. The interference study exhibited excellent selectivity towards glyphosate. In addition, satisfactory recoveries ranging from 91.31% to 105.28% were achieved for the real samples. These results indicate that the CND/Cu2+ fluorescence sensing system has practical application prospects.

Graphical abstract: The construction of a CND/Cu2+ fluorescence sensing system for the ultrasensitive detection of glyphosate

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Supplementary files

Article information


Submitted
25 Oct 2019
Accepted
17 Dec 2019
First published
20 Dec 2019

Anal. Methods, 2020,12, 520-527
Article type
Paper

The construction of a CND/Cu2+ fluorescence sensing system for the ultrasensitive detection of glyphosate

X. Wang, M. Sakinati, Y. Yang, Y. Ma, M. Yang, H. Luo, C. Hou and D. Huo, Anal. Methods, 2020, 12, 520
DOI: 10.1039/C9AY02303H

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