A ratio fluorescence sensor based on rhodamine B embedded metal-organic framework for glyphosate detection in agri-food products

IF 8.5 1区农林科学 Q1 CHEMISTRY, APPLIED

Food Chemistry Pub Date : 2022-11-15 DOI:10.1016/j.foodchem.2022.133446

Chao-Qun Wan , Yue-Hong Pang , Yong-Wei Feng , Xiao-Fang Shen

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引用次数: 13

Abstract

Glyphosate, a broad-spectrum and high-efficiency herbicide, could accumulate in the human body through the consumption of agri-food products. Herein, a ratio fluorescence sensor based on rhodamine B-embedded amino-functionalized iron-based metal-organic framework (MOF, NH₂-MIL-88(Fe)@RhB) bonded with Cu²⁺ was developed for rapid detection of glyphosate. The synthesized NH₂-MIL-88(Fe) was a biconical prism and had a cavity for the embedding of RhB as a reference compound. In the presence of Cu²⁺, Lewis interactions with NH₂-MIL-88(Fe)@RhB cause the fluorescence signal to be turned off. When glyphosate was added, the signal was turned on due to chelation with Cu²⁺ and hydrogen bonding interactions with NH₂-MIL-88(Fe)@RhB. Under optimal conditions, the developed sensor exhibited a linear range of 0.60–45 μmol L⁻¹ with a response time of less than 1 min. The sensor was applied in the analysis of agri-food products (tea, soybean, wheat, cucumber), with recoveries between 97.93% and 109.06%, indicating its promising application in agri-food safety.

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基于罗丹明B嵌入金属-有机框架的比例荧光传感器用于农产品中草甘膦的检测

草甘膦是一种广谱高效的除草剂，可通过食用农产品在人体内积累。本文设计了一种基于罗丹明b包埋氨基功能化铁基金属有机骨架(MOF, NH2-MIL-88(Fe)@RhB)与Cu2+键合的比例荧光传感器，用于草甘膦的快速检测。合成的NH2-MIL-88(Fe)为双棱柱状结构，并具有可包埋RhB作为参比化合物的空腔。在Cu2+存在下，与NH2-MIL-88(Fe)@RhB的Lewis相互作用导致荧光信号被关闭。加入草甘膦后，由于与Cu2+的螯合作用和与NH2-MIL-88(Fe)@RhB的氢键相互作用，信号被打开。在最佳条件下，该传感器的线性范围为0.60 ~ 45 μmol L−1，响应时间小于1 min。该传感器可用于农产品(茶叶、大豆、小麦、黄瓜)的分析，回收率在97.93% ~ 109.06%之间，在农业食品安全领域具有广阔的应用前景。

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来源期刊

Food Chemistry 工程技术-食品科技

CiteScore

16.30

自引率

10.20%

发文量

3130

审稿时长

122 days

期刊介绍： Food Chemistry publishes original research papers dealing with the advancement of the chemistry and biochemistry of foods or the analytical methods/ approach used. All papers should focus on the novelty of the research carried out.