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Fluorometric determination of ziram using CsPbBr3 quantum dots
Shuqin Chen1, Mengna Huang2, Mianli Huang2
1College of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou, 362000, People's Republic of China. chenshuqin@qztc.edu.cn.
Mikrochimica Acta
|October 22, 2021
Summary
This study introduces a new method using cesium lead bromide perovskite quantum dots (CsPbBr3 QDs) to detect the ziram pesticide. The CsPbBr3 QDs offer a sensitive and reliable approach for ziram determination in food safety applications.
Area of Science:
- Materials Science
- Analytical Chemistry
- Environmental Science
Background:
- Pesticide detection is crucial for food safety and environmental monitoring.
- Cesium lead bromide perovskite quantum dots (CsPbBr3 QDs) offer unique optical properties for sensing applications.
Purpose of the Study:
- To develop a sensitive and facile method for ziram pesticide determination.
- To investigate the fluorescence quenching mechanism of CsPbBr3 QDs in the presence of ziram.
Main Methods:
- Synthesis of CsPbBr3 quantum dots (QDs) using a facile, inert gas-free method.
- Utilizing the turn-off fluorescence behavior of CsPbBr3 QDs for ziram detection.
- Investigating the fluorescence quenching mechanism via surface defects and structural changes.
Main Results:
- The CsPbBr3 QDs exhibited inverse proportionality between fluorescence intensity and ziram concentration (0.10–50.0 ppm).
- A low detection limit of 0.086 ppm for ziram was achieved.
- Satisfactory recoveries (100 ± 0.25% to 107 ± 5.72%) were obtained in spiked fruit samples.
Conclusions:
- The developed strategy provides a promising and applicable method for ziram detection in real food samples.
- The fluorescence quenching mechanism involves increased surface defects and structural alterations in CsPbBr3 QDs.
- This approach holds significant potential for enhancing food safety monitoring systems.
