金属卤化物CH3NH3PbBr3钙钛矿量子点快速检测新烟碱类农药
Rapid Detection of Neonicotinoids by Metal Halide CH3 NH3 PbBr3 Perovskite Quantum Dots
周然锋 1彭茂民 2刘丽 1尹小丽 3彭西甜 1夏虹2
作者信息
- 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;长江大学 生命科学学院,湖北 荆州 434023
- 2. 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
- 3. 长江大学 生命科学学院,湖北 荆州 434023
- 折叠
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CH3NH3PbBr3(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0.993 9,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.
Abstract
A new method for the rapid detection of neonicotinoid pesticides based on metal halide perovskite quan-tum dot fluorescent probes was constructed by taking neonicotinoid pesticides as the target and combining fluores-cence sensing strategies.The linear detection range of the method was 0-20 mg/L,the linear correlation coefficient was 0.993 9,the detection limit was 0.17 mg/kg.The recovery rate of clothianidin spiked in banana and radish sam-ples was 79.3%-115.4%,and the relative standard deviation was less than 9.4%.This method has high sensitivi-ty,high selectivity and applicability,and provides an effective detection technology for the risk prevention and con-trol 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 dy-namic 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Key words
metal halide perovskite/quantum dots/rapid detection/neonicotinoid pesticides引用本文复制引用
基金项目
湖北省自然科学基金(2021CFB387)
武汉市知识创新专项项目(2022020801020345)
出版年
2024
国家科技期刊平台
NSTL
万方数据