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- W3157697147 abstract "Abstract In this study, we have developed a sensitive approach to measure organophosphorus pesticides (OPs) using graphitic-phase C 3 N 4 nanosheets (g-C 3 N 4 ) combined with a nanomaterial-based quencher MnO 2 nanosheets (MnO 2 NS). Because MnO 2 NS could quench the fluorescence of g-C 3 N 4 via the inner-filter effect (IFE), the enzymatic hydrolysate (thiocholine, TCh) can efficiently trigger the decomposition of MnO 2 nanosheets in the presence of acetylcholinesterase (AChE) and acetylthiocholine, resulting in the fluorescence recovery of g-C 3 N 4 . OPs, as inhibitors for AChE activity, can prevent the generation of TCh and decomposition of MnO 2 nanosheets, accompanied by fluorescence quenching again. So the AChE-ATCh-MnO 2 -g-C 3 N 4 system can be utilized to detect OPs quantitatively based on the g-C 3 N 4 fluorescence. Under the optimum conditions, the linear range for the determination of parathion-methyl (PM) and 2,2-dichlorovinyl dimethyl phosphate (DDVP) were found in the range of 0.1-2.1 ng/mL with a limit of detection of 0.069 ng/mL, and 0.5-16 ng/mL with a limit of detection of 0.069 ng/mL, respectively. Finally, this method was exploited for the monitoring of PM in real samples. The advantages of the assay are user-friendly, easy-to-ease, cost-effective compared to sophisticated analytical instruments." @default.
- W3157697147 created "2021-05-10" @default.
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- W3157697147 date "2021-02-19" @default.
- W3157697147 modified "2023-09-23" @default.
- W3157697147 title "Graphitic-Phase C3N4 Nanosheets Combined with MnO2 Nanosheets for Sensitive Fluorescence Quenching Detection of Parathion-Methyl" @default.
- W3157697147 doi "https://doi.org/10.21203/rs.3.rs-210957/v1" @default.
- W3157697147 hasPublicationYear "2021" @default.
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