Visual and microplate detection of aflatoxin B2 based on NaCl-induced aggregation of aptamer-modified gold nanoparticles

文献类型: 外文期刊

第一作者: Luan, Yunxia

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

作者机构:

关键词: Aflatoxin B2;Aptamer;Gold nanoparticles;Colorimetry;Mycotoxin

期刊名称:MICROCHIMICA ACTA ( 影响因子:5.833; 五年影响因子:5.357 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: We describe a fast and sensitive method for the detection of aflatoxin B2 (AFB2) that is based on the addition of AFB2-sensitive aptamers to a colloidal solution of gold nanoparticles (AuNPs). Subsequent addition of AFB2 and NaCl to the solution causes a color change from wine-red to blue-purple. Best results are obtained at a pH value of 7.0, a 10 mM aptamer concentration, and a 2 M concentration of NaCl. The method has a linear dynamic range that extends from 0.025 to 10 nga (TM) mL(-1) of AFB2, and the detection limit is 25 pga (TM) mL(-1). The method is simple, fast, highly sensitive, and enables both visual and microplate readout.

分类号: O65`O655

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