3. Results
3.1. Method performance
For the ELISA screening test, the detection limit for the AFM1 toxin in raw milk samples was determined at 0.0003 μg/L and the analyte recovery was 97.1%. The linearity of the calibration curve was verified within the interval of 0.0003–1.0 μg/L. These results are consistent with those declared by the manufacturer for the determination of AFM1. The HPLC-FD confirmatory analysis showed a recovery rate up to 90% for AFM1, in accordance with Brazilian Legislation requirements for contaminants at lower concentrations (