期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 848, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2022.157675
关键词
Molecularly imprinted quantum dots; Tricolor; Ratiometric fluorescence; Visual detection; Dibutyl phthalate
资金
- Key Research and Development Program of Zhejiang Province [2022C02028, 2021C02062]
- Natural Science Foundation of Zhejiang Province [LGF21C190001, LQ21C200002]
- Ningbo Science and Technology Bureau [202002N3066, 2022S163]
- Major Scientific and Technological Project of Ningbo [2021Z102, 2021Z056]
A tricolor ratiometric fluorescence sensor was developed using molecularly imprinted quantum dots and quantum dots. It showed a wider range of color variations for visual DBP detection and had comparable results to gas chromatography-tandem mass spectrometry.
A tricolor ratiometric fluorescence sensor was fabricated by mixing blue- and red-emission molecularly imprinted quantum dots (MIP-QDs) with green-emission quantum dots at the optimal ratio. The MIP-QDs were synthesized by coating CdSe/ZnS QDs in polymer by inverse microemulsion method. Compared with single-emission or dual-emission sensors, the tricolor ratiometric fluorescence sensor provided a wider range of color variations for visual DBP detection. The ratio fluorescence value I-530/(I-450 + I-630) of the tricolor ratiometric fluorescence sensor linearly changed within the concentration of 2.0-20.0 x 10(3) mu g/L DBP. The correlation coefficient was 0.9910, and the limits of detection were 1.0 mu g/kg and 0.65 mu g/L in fish and seawater, respectively. Meanwhile, the fluorescence color gradually changed from purple to plum to pink to salmon to yellowish green and finally to green. The recoveries of DBP in fish and seawater were 84.3 %-91.4 % and 88.3 %-110.3%, respectively. Moreover, no obvious differences were observed between the detection results of the tricolor ratiometric fluorescence sensor and gas chromatography-tandem mass spectrometry. The tricolor ratiometric fluorescence sensor constructed herein provides an ideal choice for rapid and intuitive DBP detection in environmental and aquatic products.
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