biostudies-literatureLi MChina Postdoctoral Science FoundationNational Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu Province26029-26035https://www.ebi.ac.uk/biostudies/studies/S-EPMC9083124biostudies-literatureUnknown8(46)The potential homogeneous assay employing immunomagnetic beads (IMB) has been receiving attention as a screening tool in food-safety control; the method is simple, efficient, and does not require long incubation times or complex separation steps. In this study, a homogeneous immunoassay has been successfully developed and applied in the determination of aflatoxin B₁ (AFB₁) contamination in agricultural products by coupling IMB and the biotin-streptavidin (BSA) (BSA-IMB) system. Under optimal conditions, the limit of detection (LOD, IC₁₀), half-maximal inhibition concentration (IC₅₀) and detection range (IC₂₀-IC₈₀) of BSA-IMB are 0.00579, 0.573 and 0.0183-17.9 ng mL^-1, respectively, for AFB₁. The detection of AFB₁ by BSA-IMB can be achieved in 40 min (ELISA needs at least 180 min). The cross-reactivities of BSA-IMB with its analogues are negligible (<3.82%); these results indicate high selectivity. The spiked recoveries are in the range from 89.6 to 118.2% with relative standard deviations (RSDs) of 3.4 to 13.2% for AFB₁ in agricultural product samples. Furthermore, the results of BSA-IMB for authentic samples show reliability and high correlation of 0.9928 with an HPLC-fluorescence detector. The proposed BSA-IMB system is demonstrated to be a satisfactory tool for homogeneous, efficient, sensitive, and alternative detection of AFB₁ in a wide detection range for agricultural product samples.RSC advancesImmunomagnetic bead-based biotin-streptavidin system for highly efficient detection of aflatoxin B₁ in agricultural products.PMC9083124317704462016M60174531701687BK2017053731570414Liu ZHong XZhao RDu DZhang YCui YLi MXue YfalseImmunomagnetic bead-based biotin-streptavidin system for highly efficient detection of aflatoxin B₁ in agricultural products.The potential homogeneous assay employing immunomagnetic beads (IMB) has been receiving attention as a screening tool in food-safety control; the method is simple, efficient, and does not require long incubation times or complex separation steps. In this study, a homogeneous immunoassay has been successfully developed and applied in the determination of aflatoxin B₁ (AFB₁) contamination in agricultural products by coupling IMB and the biotin-streptavidin (BSA) (BSA-IMB) system. Under optimal conditions, the limit of detection (LOD, IC₁₀), half-maximal inhibition concentration (IC₅₀) and detection range (IC₂₀-IC₈₀) of BSA-IMB are 0.00579, 0.573 and 0.0183-17.9 ng mL^-1, respectively, for AFB₁. The detection of AFB₁ by BSA-IMB can be achieved in 40 min (ELISA needs at least 180 min). The cross-reactivities of BSA-IMB with its analogues are negligible (<3.82%); these results indicate high selectivity. The spiked recoveries are in the range from 89.6 to 118.2% with relative standard deviations (RSDs) of 3.4 to 13.2% for AFB₁ in agricultural product samples. Furthermore, the results of BSA-IMB for authentic samples show reliability and high correlation of 0.9928 with an HPLC-fluorescence detector. The proposed BSA-IMB system is demonstrated to be a satisfactory tool for homogeneous, efficient, sensitive, and alternative detection of AFB₁ in a wide detection range for agricultural product samples.2018-01-01T00:00:00Z2018 Jul2024-11-14T03:48:58.757Z2024-11-14T03:48:58.757ZS-EPMC90831243554194810.1039/c8ra04460k