LIU Lian,XIAO Xiao-hua,LI Gong-ke.Fluorescent Lateral Flow Immunoassay Test Strip for Aflatoxin B1 in Cereal Products[J].Journal of Instrumental Analysis,2026,45(10):2179-2186.
LIU Lian,XIAO Xiao-hua,LI Gong-ke.Fluorescent Lateral Flow Immunoassay Test Strip for Aflatoxin B1 in Cereal Products[J].Journal of Instrumental Analysis,2026,45(10):2179-2186.DOI: 10.12452/j.fxcsxb.26030801.
Fluorescent Lateral Flow Immunoassay Test Strip for Aflatoxin B1 in Cereal Products
To meet the demand for rapid on-site screening of aflatoxin B1(AFB1) in cereal products,a time-resolved fluorescent microsphere-based lateral flow immunoassay(TRFM-LFIA) technique was developed using a specific monoclonal antibody. Key experimental parameters,including the pH for antibody labeling,antibody concentration,and coating antigen concentration,were optimized systematically. The fluorescent microsphere-labeled antibody probe was pre-coated onto the conjugate pad,enabling rapid detection of AFB1 in cereals within 10 min,including sample preparation. Under the optimized conditions,the proposed TRFM-LFIA exhibited a linear detection range of 0.05-10.00 μg/L for AFB1,with a limit of detection(LOD) of 1.30×10
-2
μg/L in buffer solution. No significant cross-reactivity was observed with four common mycotoxins,including ochratoxin A and fumonisin B1. The results obtained using the method proposed herein were in good agreement with those obtained using the isotope dilution liquid chromatography-tandem mass spectrometry reference method,with a coefficient of determination of 0.991 8. Owing to its rapidity,sensitivity,and accuracy,the developed TRFM-LFIA technique is suitable for application in on-site,high-throughput screening of AFB1 in cereal products and provides robust technical support for food safety risk monitoring.
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