金属卤化物CH_(3)NH_(3)PbBr_(3)钙钛矿量子点快速检测新烟碱类农药  

Rapid Detection of Neonicotinoids by Metal Halide CH_(3)NH_(3)PbBr_(3) Perovskite Quantum Dots

作　　者：周然锋 彭茂民[1] 刘丽[1,2] 尹小丽 彭西甜 夏虹[1] ZHOU Ranfeng;PENG Maomin;LIU Li;YIN Xiaoli;PENG Xitian;XIA Hong(Hubei Key Laboratory of Nutritional Quality and Safety of Agro Products,Institute of Agricultural Quality Standards and Testing Technology Research,Hubei Academy of Agricultural Science,Wuhan 430064,China;College of Life Science,Yangtze University,Jingzhou 434023,China)

机构地区：[1]湖北省农业科学院农业质量标准与检测技术研究所,农产品营养品质与安全湖北省重点实验室,湖北武汉430064 [2]长江大学生命科学学院,湖北荆州434023

出　　处：《发光学报》2024年第4期688-698,共11页Chinese Journal of Luminescence

基　　金：湖北省自然科学基金(2021CFB387);武汉市知识创新专项项目(2022020801020345)。

摘　　要：以新烟碱类农药为靶标物,结合荧光传感策略构建了基于金属卤化物钙钛矿量子点CH_(3)NH_(3)PbBr_(3)(Perovskite quantum dots,PQDs)荧光探针快速检测新烟碱类农药的新方法。该方法的线性检测范围为0.0~20 mg/L,相关系数为0.9939,检出限和定量限分别为0.17 mg/kg和0.56 mg/kg。对萝卜和香蕉样品中噻虫胺的加标回收率在79.3%~115.4%之间,日内日间相对标准偏差在3.8%~9.4%之间。该方法具有高灵敏度、高选择性和适用性,为农产品中新烟碱类农药残留的风险防控提供了一种有效的检测技术。对噻虫胺与钙钛矿量子点之间的相互作用进行了研究,结果表明,钙钛矿量子点与噻虫胺之间的相互作用是一个动态过程,噻虫胺对钙钛矿量子点的荧光猝灭方式为通过氢键或范德华力形成了新的复合物的静态猝灭。其内容可作为其他光谱分析手段的技术基础,其分析检测结果可为果蔬安全监管提供有价值的建议。A new method for the rapid detection of neonicotinoid pesticides based on metal halide perovskite quantum dot fluorescent probes was constructed by taking neonicotinoid pesticides as the target and combining fluorescence sensing strategies.The linear detection range of the method was 0-20 mg/L,the linear correlation coefficient was 0.9939,the detection limit was 0.17 mg/kg.The recovery rate of clothianidin spiked in banana and radish samples was 79.3%-115.4%,and the relative standard deviation was less than 9.4%.This method has high sensitivity,high selectivity and applicability,and provides an effective detection technology for the risk prevention and control of clothianidin in agricultural products and food.The interaction between clothianidin and perovskite quantum dots was studied.The results showed that the interaction between perovskite quantum dots and clothianidin was a dynamic process,and the fluorescence quenching of clothianidin to perovskite quantum dots was static quenching of new complexes formed by hydrogen bonds or van der Waals forces.Its content can be used as the technical basis of other spectral analysis methods,and its analysis and detection results can provide valuable suggestions for the safety supervision of fruits and vegetables.

关 键 词：金属卤化物钙钛矿 量子点 快速检测 新烟碱类农药 

分 类 号：O482.31[理学—固体物理]