Highly Sensitive Colorimetric Detection of Ochratoxin A by a Label-Free Aptamer and Gold Nanoparticles

文献类型: 外文期刊

第一作者: Luan, Yunxia

作者: Luan, Yunxia;Chen, Jiayi;Li, Cheng;Fu, Hailong;Ma, Zhihong;Lu, Anxiang;Luan, Yunxia;Chen, Jiayi;Li, Cheng;Fu, Hailong;Ma, Zhihong;Lu, Anxiang;Xie, Gang

作者机构:

关键词: aptamer;Ochratoxin A (OTA);gold nanoparticles;cationic polymer;colorimetric assay

期刊名称:TOXINS ( 影响因子:4.546; 五年影响因子:4.8 )

ISSN: 2072-6651

年卷期: 2015 年 7 卷 12 期

页码:

收录情况: SCI

摘要: A label-free aptamer-based assay for the highly sensitive and specific detection of Ochratoxin A (OTA) was developed using a cationic polymer and gold nanoparticles (AuNPs). The OTA aptamer was used as a recognition element for the colorimetric detection of OTA based on the aggregation of AuNPs by the cationic polymer. By spectroscopic quantitative analysis, the colorimetric assay could detect OTA down to 0.009 ng/mL with high selectivity in the presence of other interfering toxins. This study offers a new alternative in visual detection methods that is rapid and sensitive for OTA detection.

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