Standard stock solution of AFM1 (1000 mg/L) was prepared by
dissolving standard AFM1 (Pr. No.: A6428, SigmaeAldrich, St. Louis,
USA) in methanol (analytical grade; Kemika, Zagreb, Croatia).
Working solutions for the enrichment of milk samples were prepared
by further dissolution of stock solution in methanol up to a
concentration of 10 mg/L. Stock solution was stored at 4 C for no
longer than 6 months, and working solutions were prepared before
each analysis.