检出限
线性范围
铕
猝灭(荧光)
过程(计算)
荧光
计算机科学
材料科学
生物系统
纳米技术
化学
色谱法
发光
生物
光电子学
光学
操作系统
物理
作者
Beibei Zhao,Xinfang Liu,Cheng Zheng,Lu Xu,Xiaoyu Zhang,Xun Feng
出处
期刊:Food Chemistry
[Elsevier]
日期:2024-05-01
卷期号:440: 138269-138269
被引量:2
标识
DOI:10.1016/j.foodchem.2023.138269
摘要
Pymetrozine (PYM) is an effective pyridine insecticide for controlling aphids, while its residues pose a serious threat to human health. Herein, a europium complex (Eu-DBPA, DBPA represents deprotonated 2,5-dibromoterephthalic acid ligand) probe was prepared for the detection of PYM via fluorescence quenching. The detection process has the advantages of short response time (2 min), wide linear range (0-4 and 4-45 mg/kg) and low detection limit (2.2 μg/kg). Furthermore, a portable detection platform was designed by integrating Eu-DBPA-based paper strip with smartphone and applied for the visual detection of PYM in real cucumber, tomato, cabbage and apple samples, obtaining satisfactory recovery (99.00 %-107.00 %) and low standard deviation (RSD < 3.4 %). In addition, a logic gate device was designed to simplify the detection process. The smartphone-integrated paper-based probe detection platform provides a new strategy for intelligent and online identification of hazards in environmental and biological samples.
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