本文已被:浏览 1565次 下载 707次
投稿时间:2014-11-28
投稿时间:2014-11-28
中文摘要: 本研究将磁微粒替代酶标板作为固定相,用于酶联免疫吸附法(enzyme-linked immunosorbent assay,ELISA)检 测玉米中的黄曲霉毒素 B1(Aflatoxin B1,AFB1)。我们进行了两类比较:第一类是以单克隆抗体为基础的间接竞争法,2.8 μm 磁微粒的引入,使检测限较常规方法低近 5 倍,为 0.028 ng/mL;第二类是以单克隆抗体为基础的直接竞争法, 分别利用 200 nm、2.8 μm 粒径的羧基磁微粒与抗体偶联, 经测定,2.8 μm 磁微粒较常规 ELISA 法检测限低 4.3 倍,为0.012 ng/mL。玉米样品中 AFB1 回收率范围在 84.2 %~125.9 %之间,相对标准偏差小于 12.3 %。
Abstract:Magnetic particles (MPs) were using as support to replace enzyme-linked immunosorbent assay plates for determination AFB1 in corn. We compared two formats for AFB1 ELISA methods. First of all, indirect competitive ELISA was developed with monoclonal antibody (MAb). The LOD of 2.8 μm MPs ELISA was 0.028 ng/mL, which was 5 times lower than conventional ELISA. Secondly,direct competitive ELISA was developed with MAb. 200 nm and 2.8 μm carboxyl-MPS were coated with AFB1 MAb. And The LOD of 2.8 μm MPs ELISA was 0.012 ng/mL,which was 4.3 times lower than conventional ELISA. The recoveries were from 84.2 % to 125.9 %, and the variations were less than 12.3 %.
文章编号:201605024 中图分类号: 文献标志码:A
基金项目:北京市市级财政项目(PXM2013_178305_000002);北京市科学技术研究院青年骨干计划(201415)
作者 | 单位 |
管笛1,2,3,亢子佳1,2,3,贾迪1,2,3,武会娟1,2,3,* | 1. 北京市理化分析测试中心,北京 100089;2. 北京市基因测序与功能分析工程技术研究中心,北京 100089;3. 北京市食品安全分析测试工程技术研究中心,北京 100089 |
引用文本: