Three kinds of lateral flow immunochromatographic assays based on the use of nanoparticle labels for fluorometric determination of zearalenone
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Colloidal gold, quantum dots and polystyrene microspheres were used as labels in three kinds of lateral flow immunochromatographic assays (ICAs) for the detection of zearalenone (ZEN) in cereal samples. The assays allow ZEN to be quantified within 20 min. The LODs are 10 μg·L−1 of ZEN for the colloidal gold-based ICA, and 1 μg·L−1 for both the quantum dot and polystyrene microsphere based ICAs. The respective data are 60 μg·kg−1, 6 μg·kg−1 and 6 μg·kg−1, respectively, for spiked samples and cereals. Only minor cross-sensitivity occurred between ZEN and fusarium toxins, and no cross-sensitivity if found for aflatoxin B1, T-2 mycotoxin, ochratoxin A, deoxynivalenol, and fumonisin B1. LODs of the three assays are lower than the maximum limits of ZEN set by most standardization agencies.
KeywordsColloidal gold Quantum dots Polystyrene microspheres Immunochromatographic assay Cereal samples
The authors are grateful for providing language help from the American Journal Experts.
This work was supported “The National Key R&D Program of China” (No. 2016YFD0401202), Special Project of Tianjin Innovation Platform (No.17PTGCCX00230).
Compliance with ethical standards
The author(s) declare that they have no competing interests.
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