食品科学 ›› 2021, Vol. 42 ›› Issue (2): 278-282.doi: 10.7506/spkx1002-6630-20190927-334

• 安全检测 • 上一篇    下一篇

基于智能手机同时检测4 种兽药残留的免疫芯片技术

吴颖,范丛丛,苏晓娜,沈玉栋,谭庶,钟翠丽,许小炫,曾道平,杨金易   

  1. (1.华南农业大学食品学院,广东 广州 510642;2.温氏食品集团股份有限公司,广东 云浮 527499)
  • 出版日期:2021-01-18 发布日期:2021-01-27
  • 基金资助:
    “十三五”国家重点研发计划重点专项(2018YFC1602904);广东省自然科学基金重大培育项目(2018B030314005); 国家自然科学基金面上项目(31871887);广州市民生科技重大专项(201704020082)

Simultaneous Detection of Four Veterinary Drugs Using Immunochip Assay Based on Smart Phone

WU Ying, FAN Congcong, SU Xiaona, SHEN Yudong, TAN Shu, ZHONG Cuili, XU Xiaoxuan, ZENG Daoping, YANG Jinyi   

  1. (1. College of Food Science, South China Agricultural University, Guangzhou 510642, China; 2. Wens Food Group Co. Ltd., Yunfu 527499, China)
  • Online:2021-01-18 Published:2021-01-27

摘要: 建立一种基于智能手机同时检测猪尿中莱克多巴胺、盐酸克仑特罗、氯霉素、氟苯尼考及其代谢物氟苯尼考胺多种兽药残留的免疫蛋白芯片方法。以硝酸纤维素膜(NC膜)为固相载体固定4 种药物抗原,基于分析物与固相抗原竞争抗体的反应,利用不同质量浓度的药物标准品与芯片显色斑点检测强度作标准曲线,建立智能手机检测方法。该方法对莱克多巴胺、盐酸克仑特罗、氯霉素、氟苯尼考的检出限分别为0.146、0.137、0.035、3.73 ng/mL,线性范围分别为0.353~1.017、0.309~0.897、0.082~0.249、9.424~35.594 ng/mL,与氟苯尼考胺的交叉反应率为81.5%。同时将本方法与胶体金免疫层析法、酶联免疫吸附法进行对比,检测结果基本一致。本方法具有低成本、高通量、操作方便等特点,适用于现场快速大量筛选。

关键词: 免疫芯片;兽药;多残留;智能手机

Abstract: An immunochip based on smart phone for simultaneous detection of four veterinary drugs including ractopamine (RAC), clenbuterol (CL), chloramphenicol (CAP), florfenicol (FF) and its metabolite florfenicol amine (FFA) in pig urine was developed in this study. The immunochip test was conducted based on the competitive reactions with the antibodies on nitrocellulose (NC) membrane. After chromogenic reaction, a calibration curve for the concentration of each veterinary drug versus the intensity of spots on the immunochip was established. The limits of detection (LODs) of the immunochip assay for RAC, CL, CAP, and FF were 0.146, 0.137, 0.035, and 3.73 ng/mL respectively, and the linear working ranges were 0.353–1.017, 0.309–0.897, 0.082–0.249, and 9.424–35.594 ng/mL, respectively. The cross-reactivity rate with FFA was 81.5%. The results determined by this method were consistent with those determined by colloidal gold immunochromatography assay (GICA) and enzyme-linked immunosorbent assay (ELISA). To sum up, this immune chip is a cheap, simple and powerful tool for on-site and high throughput screening of veterinary drug residues.

Key words: immunochip; veterinary drugs; simultaneous detection; smart phone

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