中国农业科学 ›› 2008, Vol. 41 ›› Issue (2): 443-449 .doi: 10.3864/j.issn.0578-1752.2008.02.018

• 植物保护 • 上一篇    下一篇

精喹禾灵酶联免疫吸咐分析(ELISA)研究

曾得意,王鸣华,施海燕,李 波   

  1. 南京农业大学植物保护学院
  • 收稿日期:2006-05-14 修回日期:1900-01-01 出版日期:2008-02-10 发布日期:2008-02-10
  • 通讯作者: 王鸣华

Study on ELISA for quizalofop-p-ethyl

MingHua Wang HaiYan Shi Bo Li   

  1. 南京农业大学植物保护学院
  • Received:2006-05-14 Revised:1900-01-01 Online:2008-02-10 Published:2008-02-10

摘要: 【目的】制备精喹禾灵的特异性抗体并建立精喹禾灵的间接竞争ELISA测定方法。【方法】精喹禾灵在碱性条件下水解合成了半抗原精喹禾灵酸,并与载体蛋白BSA和OVA偶联,分别合成了免疫抗原和包被抗原,偶联比分别为29.23和7.87。将Hapten-BSA免疫兔子获得多克隆抗体。【结果】抗血清的效价为200 000。经酶联免疫吸附反应分析(ELISA)测定,精喹禾灵的抑制中浓度(IC50)为0.03495 μg•ml-1,最低检测浓度(IC10)为0.002 μg•ml-1,检测范围为0.002~0.5 μg•ml-1。其与结构相似的物质几乎没有交叉反应,表明该方法具有很强的特异性,且在水样中的添加回收率为89.02%~108.88%。【结论】成功获得精喹禾灵特异性抗体并建立了水样中精喹禾灵农药残留的ELISA测定方法。

关键词: 精喹禾灵, 半抗原, 多克隆抗体, IC-ELISA

Abstract: A hapten quizalofop acid was synthesized and covalently conjugated with the carrier proteins bovine serum albumin (BSA) and ovalbumin (OVA), respectively. The coupling ratio of Hatpen-BSA is 29.23 and the coupling ratio of Hatpen-OVA is 7.87. Polyclonal antibodies against quizalofop-p-ethyl were generated by immunizing rabbits with the hapten-protein conjugates (Hapten-BSA). Also antisera were screened and selected. The antibodies showed the IC50 for quizalofop-p-ethyl was 0.03495 靏/mL and the lower detection limit was 0.00192 靏/mL, the working range was assigned to concentrations 0.002-0.5 礸/mL for quizalofop-p-ethyl. Furthermore, other structurally closely related compounds tested hardly did cross-react in this assay. When water sample fortified with quizalofop-p-ethyl were analyzed, recoveries were in the range of 89.02-108.88%.

Key words: Quizalofop-p-ethyl, Hapten, Polyclonal antibody, IC-ELISA