基于表面印迹聚合物的电化学传感器用于乙型副伤寒沙门氏菌的检测An Electrochemical Sensor Based on Surface Molecularly Imprinted Polymer for Detection of Salmonella Paratyphi B
刘婷;林晓惠;陈谦;卞晓军;颜娟;
摘要(Abstract):
致病菌感染引发的食源性疾病已成为全球性的食品安全和公共卫生问题,因此,构建快速、灵敏的致病菌分析方法具有重要意义。本研究结合分子印迹技术与电化学阻抗技术,以噻吩-3-乙醇(TE)为单体,乙型副伤寒沙门氏菌(S.Paratyphi B)为模板,采用一步电聚合法在玻碳电极表面快速、便捷地制备了一层具有特异性识别能力的细菌印迹膜,据此构建了一种快速、灵敏、无标记检测沙门氏菌的新方法。采用电化学阻抗和扫描电子显微镜对细菌印迹膜的形成过程进行了表征。在最佳实验条件下,细菌印迹传感器具有识别快速(仅10 min)、线性范围宽(1.0×101~1.0×101~1.0×106 CFU/mL)、检出限低(约2.0 CFU/mL)、选择性好等良好的分析性能,用于实际样品(饮用水和脱脂奶粉)中沙门氏菌的检测效果良好,回收率高(93.0%~114.9%)。与现有的细菌生物传感方法相比,此传感器具有制备高效(印迹膜的形成仅需15 min)、成本低、环境友好等优点,在细菌检测方面具有较大的应用潜力。
关键词(KeyWords): 乙型副伤寒沙门氏菌;电化学聚合;表面印迹聚合物;聚噻吩;细菌电化学传感器;细菌印迹;无标记检测
基金项目(Foundation): 国家自然科学基金项目(No.21775102);; 上海市自然科学基金项目(No.20ZR1424100)资助~~
作者(Authors): 刘婷;林晓惠;陈谦;卞晓军;颜娟;
DOI: 10.19756/j.issn.0253-3820.210715
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