食品科学 ›› 2005, Vol. 26 ›› Issue (11): 174-177.

• 分析检测 • 上一篇    下一篇

以赭曲霉毒素A单克隆抗体建立竞争酶联免疫吸附分析方法的研究

 刘仁荣, 余宙, 何庆华, 许杨   

  1. 南昌大学食品科学教育部重点实验室
  • 出版日期:2005-11-15 发布日期:2011-10-01

Study on Competitive Enzyme-linked Immunosorbent Assay for Ochratoxin A Monoclonal Antibody Determination

 LIU  Ren-Rong, YU  Zhou, HE  Qing-Hua, XU  Yang   

  1. The Key Laboratory of Food Science of MOE, Nanchang University
  • Online:2005-11-15 Published:2011-10-01

摘要: 本研究通过活性酯法合成赭曲霉毒素A人工抗原,免疫小鼠制备单克隆抗体,在此基础上建立了竞争ELISA检测方法,线性范围为200~6000pg/ml,检测下限为150pg/ml。单抗与赭曲霉毒素B的交叉反应率为35%,与桔霉素、黄曲霉毒素B1和展青霉素等毒素交叉反应低于0.01%。在小麦样品中的加标回收率为83%~116%,变异系数为9.4%~19.8%。测试23份样品,赭曲霉毒素A的含量在0.6~2.56μg/kg之间。

关键词: 赭曲霉毒素A人工抗原, 单克隆抗体, 酶联免疫吸附分析方法

Abstract: Ochratoxin A (OTA) artificial antigen was synthesized by active ester method. A monoclonal antibody was prepared after being immune to mice. A competitive enzyme-linked immunosorbent assay was developed with it. The linear range of the assay was between 200pg/ml and 6000pg/ml and the lowest detectable amount of OTA was 150 pg/ml. Cross reactivity was 35% with ochratoxin B, and less than 0.01% with citrinin, patulin, aflatoxin B1, deoxynivalenol and zearalenone. Recovery of OTA from wheat spiked with OTA was 83% to 116% and the coefficient of variation was 9.4%~19.8%. The analysis of 23 domestic samples showed OTA levels ranging from 0.6μg/kg to 2.56μg/kg.

Key words: ochratoxin A, artificial antigen, monoclonal antibody, ELISA