中山大学 化学学院,广东 广州 510006
肖小华,博士,教授,研究方向:复杂样品分离分析,E-mail:xiaoxhua@mail.sysu.edu.cn
李攻科,博士,教授,研究方向:复杂样品分离分析,E-mail:cesgkl@mail.sysu.edu.cn
收稿:2026-03-08,
修回:2026-04-28,
录用:2026-06-23,
网络首发:2026-08-07,
纸质出版:2026-10-15
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刘恋,肖小华,李攻科.荧光侧流免疫层析法检测谷物制品中黄曲霉毒素B1[J].分析测试学报,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.
刘恋,肖小华,李攻科.荧光侧流免疫层析法检测谷物制品中黄曲霉毒素B1[J].分析测试学报,2026,45(10):2179-2186. DOI: 10.12452/j.fxcsxb.26030801.
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.
基于特异性单克隆抗体,通过系统优化标记抗体pH值、抗体用量、包被抗原浓度等关键参数,并将探针预包被于共轭垫,建立了一种基于时间分辨荧光微球(TRFM)标记的侧流免疫层析方法(TRFM-LFIA),用于谷物中黄曲霉毒素B1(AFB1)的快速检测,该法包含样品制备在内的总检测时间为10 min。结果表明:在最优条件下,所建立的TRFM-LFIA方法对AFB1的线性范围为0.05~10.00 μg/L,纯缓冲溶液中检出限(LOD)为1.30×10
-2
μg/L。与赭曲霉毒素A、伏马毒素B1等4种常见霉菌毒素无明显交叉反应,且与同位素稀释液相色谱-串联质谱标准方法结果相吻合(
r
2
=0.991 8)。该方法具有快速、灵敏、准确等优点,适用于谷物制品中AFB1的现场高通量筛查,为食品安全风险监控提供了有力的技术支持。
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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