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Microchimica Acta

, 186:748 | Cite as

Fluorometric lateral flow immunoassay for simultaneous determination of three mycotoxins (aflatoxin B1, zearalenone and deoxynivalenol) using quantum dot microbeads

  • Runxian Li
  • Chengzhen Meng
  • Yang Wen
  • Wei Fu
  • Pingli HeEmail author
Original Paper
  • 27 Downloads

Abstract

A fluorometric lateral flow immunoassay (LFA) is described for the simultaneous determination of the mycotoxins aflatoxin B1 (AFB1), zearalenone (ZEN) and deoxynivalenol (DON). The method is based on the use of CdSe/SiO2 quantum dot microbeads (QBs) with a mean diameter of 106 nm. These have strong red luminescence (with excitation/emission peaks at 365/622 nm) which results in enhanced sensitivity. The QBs binding with monoclonal antibodies (mAbs) as the signal probes can react specifically with AFB1, ZEN and DON, respectively. There is an inverse correlation between the fluorescence signal intensity of test line and the analyte content, which can realize the quantitative analysis of analytes within 15 min. The limits of detection in solution are 10, 80 and 500 pg mL−1 for AFB1, ZEN and DON, respectively. Besides, the average recoveries from spiked feed range from 85.5 to 119.0%, and the relative standard deviations are less than 16.4% for both intra- and inter-day assays. The method was used to analyze naturally contaminated feedstuff, and this resulted in a good agreement with data obtained by LC-MS/MS.

Graphical abstract

Schematic representation of a fluorometric method for the simultaneous determination of three mycotoxins. Quantum dot microbeads (QBs) binding with monoclonal antibodies (mAbs) are signal probes. There is an inverse correlation between the fluorescence intensity of test line and the analyte concentration.

Keywords

Immunochromatographic strip Antibody Food safety Rapid detection Feedstuff LC-MS/MS Cereal samples Multiplexed Quantitative analysis 

Notes

Acknowledgments

The financial support from the National Key Research and Development Program of China (2017YFC1600300) is gratefully acknowledged.

Compliance with ethical standards

Conflict of interest

The author(s) declare that they have no conflict of interest.

Supplementary material

604_2019_3879_MOESM1_ESM.doc (936 kb)
ESM 1 (DOC 935 kb)

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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Animal Nutrition, College of Animal Science and TechnologyChina Agricultural UniversityBeijingPeople’s Republic of China

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