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A traffic light-fluorescent lateral flow immunoassay with dual-color quantum dot nanobeads for the simultaneous detection of ractopamine and clenbuterol

文献类型： 外文期刊

作者： Li, Runxian 1 ; Suo, Decheng 1 ; Yu, Zhengjie 1 ; Xiao, Zhiming 1 ; Wei, Peiling 2 ; Wang, Shi 1 ; Feng, Yuchao 1 ; Fan, Xia 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, State key Lab Qual & Safety Agroprod, Beijing 100081, Peoples R China

2.Xinjiang Acad Anim Sci, Inst Anim Husb Qual Stand, Urumqi 830057, Peoples R China

关键词： Ractopamine; Clenbuterol; Traffic light-lateral flow immunoassay; Quantum dot nanobeads

期刊名称：MICROCHEMICAL JOURNAL （ 影响因子：5.1； 五年影响因子：4.7 ）

ISSN： 0026-265X

年卷期： 2025 年 214 卷

页码：

收录情况： SCI

摘要： The abuse of illegal (32-adrenergic agonists in animal feeding poses a threat to human health. Fluorescent lateral flow immunoassay (LFIA) is a promising point-of-care testing (POCT) method for monitoring illicit drug use on farms. Here, a traffic light- dual-color quantum dot nanobeads based fluorescent lateral flow immunoassay (QBsLFIA) was developed for simultaneously detecting ractopamine (RAC) and clenbuterol (CLE). CdSe/ZnS quantum dot nanobeads that emit red and green fluorescence were introduced in this study. They were conjugated with anti-RAC and anti-CLE monoclonal antibodies, respectively, to prepare traffic light fluorescent probes (QBsmAbs). The dual-color QBs-mAbs greatly enhanced the analytical performance and solved the restriction that multiple mAbs on the control line cannot be accurately distinguished in traditional single-color LFIA. Under optimal conditions, the limits of detection (LODs) for RAC and CLE were 15.7 and 36.3 pg/mL, respectively. The recoveries in spiked cattle urine ranged from 80.3 to 106.1 % with relative standard deviations (RSDs) less than 13.2 %. Good correlations were observed between the detection results of QBs-LFIA and LC-MS/MS (R2 = 0.9931). The proposed traffic light QBs-LFIA provides a novel approach for simultaneously detecting RAC and CLE. It is also a promising POCT platform for rapid, sensitive, and on-site detection of multiple drug residues.

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