Fluorescent Detection of 2,4-Dichlorophenoxyacetic Acid in Food Samples Based on Covalent Organic Frameworks and MnO(2)Nanosheets

NWIPB OpenIR

	Fluorescent Detection of 2,4-Dichlorophenoxyacetic Acid in Food Samples Based on Covalent Organic Frameworks and MnO(2)Nanosheets
	Qu, Fei; Sun, Yang; Guo, Shuxian; Yan, Hang; You, Jinmao
	2020
发表期刊	FOOD ANALYTICAL METHODS
卷号	13 期号:10
摘要	2,4-Dichlorophenoxyacetic acid (2,4-D) is a typical chlorinated aromatic herbicide which is widely used because of its low cost. Herein, a new fluorescent assay for 2,4-D is developed based on covalent organic frameworks (COFs) and MnO(2)nanosheets. The fluorescence of COFs is quenched effectively by MnO(2)nanosheets. Ascorbic acid 2-phosphate (AAP) is hydrolyzed by alkaline phosphatase (ALP) to produce ascorbic acid (AA), which reduces MnO(2)nanosheets into Mn2+, so the quenched fluorescence recovers. Additionally, 2,4-D can inhibit the catalytic activity of ALP. Therefore, the addition of 2,4-D quenches the fluorescence of COF-MnO(2)system again. Under the optimum conditions, this assay displays a wide linear range of 2,4-D from 1 to 150,000 ng/mL with a limit of detection of 0.36 ng/mL. Then, this method is successfully used to measure 2,4-D in rice, millet, and cucumber samples with satisfactory recoveries. Compared with other probes for 2,4-D detection, both of COFs and MnO(2)nanosheets are stable, cost-effective, and easily prepared. The sensitivity and linear range of 2,4-D in this strategy are superior to most reported works. This is the first time that a novel sensing platform using fluorescent COFs and MnO(2)nanosheets is developed for 2,4-D.
关键词	Covalent organic frameworks MnO(2)nanosheets Alkaline phosphatase Food 2 4-Dichlorophenoxyacetic acid
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/60307
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Qu, Fei,Sun, Yang,Guo, Shuxian,et al. Fluorescent Detection of 2,4-Dichlorophenoxyacetic Acid in Food Samples Based on Covalent Organic Frameworks and MnO(2)Nanosheets[J]. FOOD ANALYTICAL METHODS,2020,13(10).
APA	Qu, Fei,Sun, Yang,Guo, Shuxian,Yan, Hang,&You, Jinmao.(2020).Fluorescent Detection of 2,4-Dichlorophenoxyacetic Acid in Food Samples Based on Covalent Organic Frameworks and MnO(2)Nanosheets.FOOD ANALYTICAL METHODS,13(10).
MLA	Qu, Fei,et al."Fluorescent Detection of 2,4-Dichlorophenoxyacetic Acid in Food Samples Based on Covalent Organic Frameworks and MnO(2)Nanosheets".FOOD ANALYTICAL METHODS 13.10(2020).