基于银纳米表面增强拉曼光谱快速检测水果中有机硫农药残留  

Use of AgNPs and gold electrode as substrates Raman enhancement for rapid detection of sulfur-containing pesticide residues at fruit

作　　者：文长春[1] 覃江克[1] 蒋庆科 岑丹丹[1] 韦春芳[1] 廖苏奇 

机构地区：[1]药用资源化学与药物分子工程教育部重点实验室,广西师范大学化学与药学学院,桂林541004

出　　处：《食品科技》2016年第4期305-309,共5页Food Science and Technology

基　　金：广西科学研究与技术开发计划课题(桂科攻12118008-10);桂林市科技计划项目(20140111-2);药用资源化学与药物分子工程教育部重点实验室主任基金项目(CMEMR2014-A10);2015年度广西自治区大学生创新创业训练计划支持项目(201510602 001)

摘　　要：研究的目的是利用银纳米粒作为关键材料制备出高效的基底用于表面增强拉曼光谱法检测农药残留,选择了有机硫农药中的福美双用于检测。银纳米在表面增强拉曼方面有着巨大的潜力,因为其纳米粒子在拉曼光谱的激发波长下很容易产生表面等离子共振。金电极是比较成熟的表面增强拉曼基底同时在辅助金属纳米结构方面也具有优良的表现。结合银纳米-金电极制备了一种新颖的表面增强拉曼基底。研究表明,银纳米-金电极(AgNPs-Au)结构对所选择的农药显示出很强的拉曼增强效果,AgNPs-Au结构对农药福美双检测的检测限为4.0×10^(-10) mol/L。银纳米-金电极复合结构在制备灵敏、轻质、灵活结构方面具有巨大的潜力,可用于表面增强拉曼应用到促进食品安全。This study aimed to use silver nanoparticles（Ag NPs） and gold electrode as key materials to fabricate high-performance substrates for the detection of pesticides by surface enhanced Raman spectroscopy（SERS）.Sulfur-containing pesticide（thiram） were selected.Ag NPs have great potential to be used as a SERS substrate because it was easy to tune the surface plasmon resonance of the nanoparticles to the laser excitation wavelength of Raman spectroscopy.Gold electrode was a ripe material that can be used for supporting metal nanostructures.One type of novel SERS substrates were fabricated,including silver nanoparticles-gold electrode substrate.The results demonstrated that Ag NPsAu substrates exhibited the strong Raman signals of the selected pesticides.The Ag NPs-Au substrate was able to detect sulfur-containing pesticides at the parts per trillion level with limits of detection at around 4.0×10^（–10） mol/L for thiram.These results indicated that combining silver nanoparticles and gold electrode has great potential in the fabrication of sensitive,lightweight,and flexible substrates for SERS applications to improve food safety.

关 键 词：有机硫农药 福美双 表面增强拉曼光谱 农药残留 

分 类 号：TS255.1[轻工技术与工程—农产品加工及贮藏工程]