-Bromophenol-Enhanced Bienzymatic Chemiluminescence Competitive Immunoassay for Ultrasensitive Determination of Aflatoxin B.

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ID: 59137
2019
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Abstract
Aflatoxin B (AFB) contamination is one of the most critical global issues in food safety. The high carcinogenic nature necessitates rapid and specific methods for the determination of AFB in foodstuffs at ultratrace levels. Here, we report an enhanced bienzymatic chemiluminescence competitive immunoassay for ultrasensitive and high-throughput determination of AFB. In this assay, protein G was first coated on the wells of a microplate for recognizing the Fc fragment of anti-AFB mAbs to reduce the antibody dosage and guarantee high immunological reaction efficiency. The target AFB competed with glucose oxidase labeled AFB for the limited anti-AFB mAbs in the wells of the microplate. -Bromophenol was employed as an enhancer to obtain intense and long-lasting chemiluminescence. The utilization of an enhancer and bienzymatic catalysts effectively improved the detection sensitivity. The developed method offered a good linearity over 5 orders of magnitude, a detection limit of 5 pg L, and a relative standard deviation of 1.9% for AFB. The application of the developed method to the analysis of grain samples gave quantitative recoveries from 94.0% to 97.0%. The developed method provides a universal platform for high-throughput, ultrasensitive, and high specific detection of pollutants or nutrients in foods.
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li2019bromophenolenhancedanalytical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Li, Juan;Zhao, Xu;Chen, Li-Jian;Qian, Hai-Long;Wang, Wen-Long;Yang, Cheng;Yan, Xiu-Ping;
Journal Analytical chemistry
Year 2019
DOI
10.1021/acs.analchem.9b03579
URL
Keywords
toxicity aflatoxin rabbits coumarin sodium bentonite

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