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1.重庆市第八中学校,重庆 400030
2.重庆医科大学 药学院,重庆 400016
白丽娟,博士,教授,研究方向:生物传感与临床检验,E-mail:bailj1018@cqmu.edu.cn
纸质出版日期:2024-05-15,
收稿日期:2024-01-19,
修回日期:2024-03-28,
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鄢斌,吴依洁,廖星星,白丽娟.基于双金属材料的电化学适体传感器用于磺胺二甲氧嘧啶检测[J].分析测试学报,2024,43(05):755-762.
YAN Bin,WU Yi-jie,LIAO Xing-xing,BAI Li-juan.Electrochemical Aptasensor Based on Bimetallic Composites for Detection of Sulfadimethoxine[J].Journal of Instrumental Analysis,2024,43(05):755-762.
鄢斌,吴依洁,廖星星,白丽娟.基于双金属材料的电化学适体传感器用于磺胺二甲氧嘧啶检测[J].分析测试学报,2024,43(05):755-762. DOI: 10.12452/j.fxcsxb.24011901.
YAN Bin,WU Yi-jie,LIAO Xing-xing,BAI Li-juan.Electrochemical Aptasensor Based on Bimetallic Composites for Detection of Sulfadimethoxine[J].Journal of Instrumental Analysis,2024,43(05):755-762. DOI: 10.12452/j.fxcsxb.24011901.
开发能够精准检测磺胺二甲氧嘧啶(SDM)的方法在食品安全领域至关重要。该研究利用具有优异电化学活性的镍锌双金属微花(Ni-Zn MFs)作为生物传感平台,同时,引入金锰纳米粒子(AuMn NPs)修饰的还原氧化石墨烯(rGO)作为电信号抑制单元(AuMn/rGO,AMG)。在此基础上,设计了一种用于测定SDM的高灵敏生物传感器。当目标物SDM存在时,能与SDM的结合适配体(Apt)标记的AMG(AMG-Apt)特异性结合,将电信号抑制单元带离电极表面,放大氧化还原探针 [Fe(CN)
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的电化学信号变化。提出的用于检测SDM的适配体传感器在1 pg/mL~100 ng/mL范围内表现出良好的线性关系,检出限(LOD)低至0.26 pg/mL。此外,该生物传感器在牛奶样品中也表现出令人满意的结果,有望在食品安全分析中应用。
The development of detection techniques for the accurate determination of sulfadimethoxine(SDM) is crucial in food safety. In this study,nickel-zinc bimetallic microflowers(Ni-Zn MFs) with excellent electrochemical activity were utilized as an electrochemical sensing platform,while reduced graphene oxide(rGO) modified with Aurum-Manganese nanoparticles(AuMn NPs) was introduced as an electrical signal hindering molecule(AuMn/rGO,AMG). On this basis,a highly sensitive biosensor for the determination of SDM was developed. When SDM is present,it can specifically bind to the binding Aptamer(Apt)-labeled AMG(AMG-Apt),which carries the electrical signal hindering molecules away from the electrode surface and amplifies the electrochemical signal of the redox probe [Fe(CN)
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]
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. The proposed aptasensor for the detection of SDM showed good linearity in the range of 1 pg/mL-100 ng/mL with a low limit of detection(LOD) of 0.26 pg/mL. Notably,this biosensor also showed satisfactory results in milk samples,which is expected to be ap
plied in food safety analysis.
电化学检测双金属适配体传感器磺胺二甲氧嘧啶(SDM)
electrochemical detectionbimetalsaptasensorsulfadimethoxine(SDM)
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