基于Fe_(3)O_(4)@MIL-100(Fe)@Ag NPs的三唑磷SERS检测方法  

Surface-enhanced Raman Scattering Detection of Triazophos Based on Fe_(3)O_(4)@MIL-100(Fe)@Ag NPs

作　　者：阳能静 朱浩帆 韦庆益[1] 孙大文[1,2] 蒲洪彬 YANG Nengjing;ZHU Haofan;WEI Qingyi;SUN Da-wen;PU Hongbin(School of Food Science and Engineering,South China University of Technology,Guangzhou 510641,China;Guangdong Laboratory for Lingnan Modern Agriculture,Guangzhou 510642,China)

机构地区：[1]华南理工大学食品科学与工程学院,广东广州510641 [2]岭南现代农业科学与技术广东省实验室,广东广州510642

出　　处：《食品科学》2023年第12期376-384,共9页Food Science

基　　金：岭南现代农业实验室科研项目(NZ2021035)。

摘　　要：针对在农产品中简便、快速地检测农药三唑磷残留问题,建立基于磁纳米、金属有机框架和Ag纳米颗粒(Ag NPs)的核-壳-卫星纳米结构表面增强拉曼光谱(surface-enhanced Raman scattering,SERS)基底,并应用在有机磷农药三唑磷的灵敏检测。通过低温循环自组装法和银镜循环制备了由MIL-100(Fe)包覆的Fe_(3)O_(4),并在表面原位负载Ag NPs组成的核-壳-卫星纳米结构的Fe_(3)O_(4)@MIL-100(Fe)@Ag NPs基底。对苹果中的三唑磷残留进行SERS传感,三唑磷特征峰强度对数值与质量浓度对数值的线性检测范围为0.05~10 mg/L,线性方程为Y=0.573 8X+2.804(R^(2)=0.980),检出限低至11.9μg/L。在加标量为2、5、10 mg/L时,该方法的回收率为90.07%~103.27%。表明制备的SERS基底在食品农残中的检测领域具有巨大潜力。A core-shell-satellite nanostructure surface-enhanced Raman scattering(SERS)substrate based on magnetic nanoparticles,metal-organic frameworks(MOFs)and gold nanoparticles(Ag NPs)was established and applied in the simple,rapid and sensitive detection of the organophosphorus pesticide triazophos in agricultural products.MIL-100(Fe)-coated Fe_(3)O_(4) was prepared by low-temperature cyclic self-assembly method,and Ag NPs were in-situ grown on the surface of MIL-100(Fe)-coated Fe_(3)O_(4) by silver mirror cycling.The SERS sensing of triazophos residues in apples was carried out.The logarithmic value(Y)of the characteristic peak intensity of triazophos was linearly related to the logarithmic value(X)of its concentration in the range of 0.05–10 mg/L,which was described by the following equation:Y=0.5738X+2.804(R^(2)=0.980).The limit of detection(LOD)was as low as 11.9 mg/L.The recoveries of the developed method ranged from 90.07%to 103.27%at spiked concentrations of 2,5,and 10 mg/L.Therefore,the prepared SERS substrate has great potential for application in the detection of pesticide residues in foods.

关 键 词：表面增强拉曼散射 金属有机框架 Fe_(3)O_(4)@MIL-100(Fe)@Ag NPs 三唑磷 

分 类 号：TS255.7[轻工技术与工程—农产品加工及贮藏工程]