磁性酶联免疫吸附法检测玉米中黄曲霉毒素B1

被引:10
作者
管笛 [1 ,2 ,3 ]
亢子佳 [1 ,2 ,3 ]
贾迪 [1 ,2 ,3 ]
武会娟 [1 ,2 ,3 ]
机构
[1] 北京市理化分析测试中心
[2] 北京市基因测序与功能分析工程技术研究中心
[3] 北京市食品安全分析测试工程技术研究中心
关键词
磁微粒; 黄曲霉毒素; 酶联免疫吸附法; 玉米;
D O I
暂无
中图分类号
R155.5 [食品卫生与检验];
学科分类号
100403 ;
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,2.8μm磁微粒的引入,使检测限较常规方法低近5倍,为0.028 ng/m L;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、2.8μm粒径的羧基磁微粒与抗体偶联,经测定,2.8μm磁微粒较常规ELISA法检测限低4.3倍,为0.012 ng/m L。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%。
引用
收藏
页码:101 / 105
页数:5
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