食品科学 ›› 2017, Vol. 38 ›› Issue (8): 239-243.doi: 10.7506/spkx1002-6630-201708037

• 安全检测 • 上一篇    下一篇

酶联免疫吸附法检测动物源性食品中恩诺沙星残留量

杨 熠,孟坤杰,赵红琼,米克热木·沙衣布扎提,张小莺,   

  1. 1.新疆农业大学动物医学学院,新疆 乌鲁木齐 830052;2.西北农林科技大学动医学院,陕西 杨凌 712100
  • 出版日期:2017-04-25 发布日期:2017-04-24
  • 基金资助:
    国家自然科学基金面上项目(31572556);2016年度国家外国专家局国文教专家聘请计划学校重点项目(X2015017); 中国-上合组织国家动物疫病与动物源性食品安全检测创新平台项目(2016E03012)

ELISA Determination of Enrofloxacin

YANG Yi, MENG Kunjie, ZHAO Hongqiong, Mikeremu·SHAYIBUZHATI, ZHANG Xiaoying,   

  1. 1. College of Veterinary Medicine, Xinjiang Agricultural University, ürümqi 830052, China; 2. College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China
  • Online:2017-04-25 Published:2017-04-24

摘要: 为检测动物源性食品中恩诺沙星残留量,评估基于卵黄抗体的间接竞争酶联免疫吸附法检测恩诺沙星的可行性,用活性脂法将恩诺沙星同卵清蛋白偶联制备免疫原和包被抗原并用紫外光谱进行验证。用聚乙二醇-6000提取卵黄抗体。五免之后效价达到峰值1∶32 000。用间接竞争酶联免疫吸附法确定包被原质量浓度、卵黄抗体的稀释倍数和IC50分别为38 ng/mL、1∶64 000和18.207 ng/mL,回归曲线方程为y=0.891 1-0.016 5x(R2=0.990)。结果表明,制备的抗恩诺沙星卵黄抗体为进一步建立检测动物源性食品中恩诺沙星的残留的免疫方法提供参考依据。

关键词: 恩诺沙星, 卵黄抗体, 药物残留, 酶联免疫吸附法

Abstract: An indirect competitive enzyme-linked immunosorbent immunoassay (ic-ELISA) based on chicken IgY was developed and validated for the detection of enrofloxacin (ENR) residues in animal-derived food samples. The ENR immunogen and coating antigen were prepared by the active ester method and confirmed by UV spectroscopy for further detection and immunization into laying hens. IgY antibodies were extracted with PEG-6000 precipitation. The titer of anti- ENR IgY attained its peak (1:32 000) after the fifth booster immunization. Checkerboard titration showed that 1:64 000 dilution of anti-ENR IgY could give OD around 1.0 at 38 ng/mL ENR-OVA coating concentration. The IC50 of the ELISA for ENR was 18.207 ng/mL and the regression curve equation was y = 0.891 1?0.016 5x (R2 = 0.990). The study demonstrated that anti-ENR IgY antibody was feasible for the detection of ENR in animal-derived food samples.

Key words: enrofloxacin, IgY, antibiotic residues, indirect competitive enzyme-linked immunosorbent immunoassay (ic-ELISA)

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