Rapid screening detection of fluoroquinolone residues in milk based on turn-on fluorescence of terbium coordination polymer nanosheets
Rapid screening detection of fluoroquinolone residues in milk based on turn-on fluorescence of terbium coordination polymer nanosheets
复制标题
基于铽配位聚合物纳米片开启荧光快速筛查检测牛奶中氟喹诺酮类药物残留
DOI：
10.1016/j.cclet.2018.11.026
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发表时间：
2019-03
影响因子：
9.1
通讯作者：
Cheng Xianglei
中科院分区：
文献类型：
--
作者：
Xu Xin;Feng Lixia;Li Jie;Yuan Ping;Feng Jiangao;Wei Lijun;Cheng Xianglei
本文报道了一种以镧系配位聚合物纳米材料为传感平台的牛奶中总氟喹诺酮类药物的简便、有效、快速的检测方法。在这项工作中使用的非发光配位聚合物纳米片（CPNS）是由腺苷一磷酸（AMP）和铽（Tb 3+）离子（AMP/Tb CPNS）。用透射电镜、傅里叶变换红外光谱和荧光光谱对产物进行了表征。Tb 3+作为配位聚合物的中心离子，AMP通过磷酸根和胺基组装。然而，荧光量子点和AMP/Tb CPNS之间的反应显着打开荧光，由于荧光量子点和Tb 3+之间的强配位相互作用。在优化条件下，AMP/Tb体系在545 nm处的荧光强度与氟喹浓度在0.04 ~ 5.0 μmol/L范围内呈线性关系。日内精密度的相对标准偏差（RSD）小于1%，检出限低至0.01 μmol/L。该方法已成功地应用于牛奶样品中氟喹诺酮类化合物的测定。
We report a facile, effective and rapid screening method for the determination of total fluoroquinolones (FQs) in milk using lanthanide coordination polymer nanomaterials as the sensing platform. The non-luminescent coordination polymer nanosheets (CPNSs) used in this work are composed of adenosine monophosphate (AMP) and terbium (Tb3+) ions (AMP/Tb CPNSs). The as-prepared CPNSs were characterized by transmission electron microscopy, Fourier transform infrared spectroscopy and fluorescence techniques. Tb3+acts as the center ion of the coordination polymer, with AMP assembled through phosphate and amine groups. However, the reaction between FQs and AMP/Tb CPNSs noticeably turns on the fluorescence due to the strong coordination interaction between FQs and Tb3+. Under optimized conditions, the fluorescence intensity of AMP/Tb at 545 nm shows a linear relationship with FQ concentrations between 0.04 μmol/L and 5.0 μmol/L. The relative standard deviation (RSD) of the intraday precision is below 1%, and detection limits are as low as 0.01 μmol/L. The proposed method was successfully applied to the determination of FQs in milk samples.
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