Abstract
The objective was the development and validation of a method for simultaneous mycotoxins determination (aflatoxins B1 — AFB1, G1 — AFG1, G2 — AFG2 and M1 — AFM1, ochratoxin — OTA, and zearalenone — ZEA) in milk by high-performance liquid chromatography with fluorescence detector. A mixture planning was used to define the mobile phase and a fractional factorial design to define a flow rate of 1.4 mL min−1, allowing the subsequent application of a rotational central composite design (CCRD). Through the CCRD, it was possible to obtain the desired resolution of 1.86 and 2.95 between the peaks of AFM1-AFG2 and ZEA-OTA, respectively, using acidification of the mobile phase 0.85%, column temperature 38 °C, and injection volume of 40 µL. In parallel, an extraction method based on the QuEChERS method was developed. The limits of quantification were 0.16, 1.08, 0.01, 0.12, 0.33, and 8.93 µg·kg−1 for AFM1, AFB1, AFG1, AFG2, OTA, and ZEA, respectively. Recovery varied between 73 and 114%. The method was applied to evaluate multi-mycotoxins’ occurrence in fluid milk (n = 30). The presence of AFB1, AFG1, AFG2, and AFM1 was detected in 26%, 30%, 93%, and 80% of the samples, respectively; however, the presence of AFM1 was below the maximum limit allowed by Brazilian legislation (0.5 µg·kg−1). OTA and ZEA were below the limit of detection. Thus, the method was capable and efficient in quantifying multi-mycotoxins in fluid milk and can also be applied as a routine method to monitor milk quality.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author upon reasonable request.
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This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior — Brazil (CAPES) — Finance Code 001 and CNPq (scholarship). The authors acknowledge the Programa de Pós-graduação em Tecnologia de Alimentos (PPGTA-UTFPR), Central Analítica Multiusuário de Medianeira, and Universidade Tecnológica Federal do Paraná (UTFPR).
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All authors contributed to the study’s conception and design. Material preparation, data collection, and analysis were performed by DNM and DAD. The first draft of the manuscript was written by KCM and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Daniélly N. Morais declares that she has no conflict of interest. Kelly C. Massarolo declares that she has no conflict of interest. Elizandra N. G. Ardohain declares that she has no conflict of interest. Juliana F. Lima declares that she has no conflict of interest. Flavio D. Ferreira declares that he has no conflict of interest. Deisy A. Drunkler declares that she has no conflict of interest.
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Morais, D.N., Massarolo, K.C., Ardohain, E.N.G. et al. Method for Determination of Multi-mycotoxins in Milk: QuEChERS Extraction Modified Followed by HPLC-FL Analysis. Food Anal. Methods 17, 47–60 (2024). https://doi.org/10.1007/s12161-023-02550-0
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DOI: https://doi.org/10.1007/s12161-023-02550-0