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Fluorescent and visual detection of methyl-paraoxon by using boron-and nitrogen-doped carbon dots
Luo,Mai1; Wei,Jinchao1; Zhao,Yunyang2; Sun,Yuzhou1; Liang,Hengxing3; Wang,Shuangpeng2; Li,Peng1
Source PublicationMicrochemical Journal

Methyl-paraoxon (MP) is a representative organophosphorus pesticide (OP), which is a huge threat to the safety of human beings. In this study, carbon dots doped with boron and nitrogen (B, N–CDs) were used as a fluorescent probe for MP detection. The prepared cerium oxide (CeO) decompose MP efficiently into p-nitrophenol (p-NP) and phosphate group in the alkaline condition. The dissociative p-NP could reduce the fluorescent intensity of B, N–CDs through the inner filter effect (IFE). The pH value, incubation time, the amount of B, N–CDs and solvent effect were investigated and optimized for detection system. Under the optimum conditions, the limit of the detection was calculated to be 24.7 ng mL with simple procedures. Tap water, lake water, Semen Coicis and Panax quinquefolius L. samples were used to test the recoveries of the detection system. The recoveries ranged from 94.68% to 107.28%. Furthermore, the fluorescence laminate was developed by painting B, N–CDs on the polyamide laminate. The MP residue could be observed directly under the 365 nm lamp, and linearity for MP by using the fluorescent laminates was ranged from 0.015 to 1.5 mM. The present work provides a rapid and dual-signal based method (fluorescent and visual) for routine detection of MP in real samples.

KeywordCarbon Dots Cerium Oxide Fluorescence Laminates Fluorescent Probe Methyl-paraoxon
URLView the original
Indexed BySCIE
WOS Research AreaChemistry
WOS SubjectChemistry, Analytical
WOS IDWOS:000527366200021
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Cited Times [WOS]:7   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionInstitute of Chinese Medical Sciences
Corresponding AuthorWang,Shuangpeng
Affiliation1.State Key Laboratory of Quality Research in Chinese Medicine,Institute of Chinese Medical Sciences,University of Macau,Macau,China
2.Institute of Applied Physics and Materials Engineering,University of Macau,Macau,China
3.Chengdu Institute for Food and Drug Control,Chengdu,China
First Author AffilicationInstitute of Chinese Medical Sciences
Recommended Citation
GB/T 7714
Luo,Mai,Wei,Jinchao,Zhao,Yunyang,et al. Fluorescent and visual detection of methyl-paraoxon by using boron-and nitrogen-doped carbon dots[J]. Microchemical Journal,2020,154.
APA Luo,Mai,Wei,Jinchao,Zhao,Yunyang,Sun,Yuzhou,Liang,Hengxing,Wang,Shuangpeng,&Li,Peng.(2020).Fluorescent and visual detection of methyl-paraoxon by using boron-and nitrogen-doped carbon dots.Microchemical Journal,154.
MLA Luo,Mai,et al."Fluorescent and visual detection of methyl-paraoxon by using boron-and nitrogen-doped carbon dots".Microchemical Journal 154(2020).
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