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  • Title: Development and validation of a sensitive monoclonal antibody-based indirect competitive enzyme-linked immunosorbent assay for the determination of the aflatoxin M1 levels in milk.
    Author: Peng D, Yang B, Pan Y, Wang Y, Chen D, Liu Z, Yang W, Tao Y, Yuan Z.
    Journal: Toxicon; 2016 Apr; 113():18-24. PubMed ID: 26867714.
    Abstract:
    A sensitive monoclonal antibody (mAb) against aflatoxin M1 (AFM1) was generated to quickly monitor the AFM1 residues in milk. Then, a mAb-based indirect competitive enzyme-linked immunosorbent assay (ic-ELISA) was established that utilizes simple sample preparation and clean-up methods. The obtained 3D8 mAb, which is an IgG1 isotype mAb, displayed an IC50 value of 64.75 ng L(-1) for AFM1 and did not exhibit measurable cross-reactivity with other aflatoxins and antibiotics. The decision limit (CCα, α = 1%), detection capability (CCβ, β = 5%), and LOQ value for the AFM1 matrix calibration method were 24 ng L(-1), 27.5 ng L(-1), and 35 ng L(-1) in the milk matrices, respectively. The AFM1 recovery ranged from 85.3% to 107.6%. The CVs were less than 13.8%. A positive correlation (r > 0.99) was observed between the ic-ELISA and HPLC-MS/MS results. This ic-ELISA would be a useful tool for screening the AFM1 residues in milk.
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