PL
Opisano optymalne warunki oznaczania fumonizyn B1 і В2 w przetworach z kukurydzy. Zbadano przebieg procesu ekstrakcji, oczyszczania ekstraktów, tworzenia fluoryzujących pochodnych fumonizyn oraz wysokosprawnej chromatografii cieczowej. Średni odzysk metody w zależności od poziomu fortyfikacji oraz rodzaju badanej próbki wynosił 64-95%, granica wykrywalności 15 µg każdej z fumonizyn w kilogramie produktu.
EN
The aim of this study was to perform a optimised method for determination of fumonisins B1 and B2 in corn products. The manner of extraction and clean-up of corn products extracts as well conditions of reaction of fumonisins with OPA was described. The main steps of optimised analytical procedure were: extraction of sample with methanol and water (3+1), clean-up of extracts on SAX column, derivatisation with OPA, and determination by means of RP-HPLC. The mobile phase was a mixture of methanol, water and acetic acid (75 +24+1). Fluorometric detection was made at 370/440 nm. The mean recovery of fumonisins dependent on fortification level and product was 64-95%, limit of detection for each of fumonisins was 15 µg/kg.