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  • Title: Liquid chromatographic determination of alpha-zearalenol and zearalenone in corn: collaborative study.
    Author: Bennett GA, Shotwell OL, Kwolek WF.
    Journal: J Assoc Off Anal Chem; 1985; 68(5):958-61. PubMed ID: 2932426.
    Abstract:
    The liquid chromatographic determination of alpha-zearalenol and zearalenone in corn was collaboratively studied. Each of 13 collaborators received 7 corn samples; 2 were blanks and 5 were spiked to contain 50, 100, and 200 ng alpha-zearalenol/g and 50, 100, 500, 1000, and 4000 ng zearalenone/g. Four sets (including blanks) of blind duplicates were included in the study. Five naturally contaminated corn samples (one in duplicate) were also provided. All collaborators detected both mycotoxins at 50 ng/g. Average recoveries reported by all collaborators ranged from 81.9% at 200 ng/g to 100.3% at 50 ng/g for alpha-zearalenol and from 77.8% at 1000 ng/g to 123% at 50 ng/g for zearalenone. Three collaborators reported false positives for both alpha-zearalenol and zearalenone. The within-laboratory CV values based on blind duplicates were 22.6% for alpha-zearalenol and 31.4% for zearalenone. The CV values based on laboratory-sample interaction were 25.6 and 33.8% for alpha-zearalenol and zearalenone, respectively. The CV values for naturally contaminated samples (including duplicates) were 47.0% for alpha-zearalenol and 37.7% for zearalenone. The method has been adopted official first action.
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