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  • Title: Comparison of two ELISA screening tests with liquid chromatography for determination of aflatoxins in raw peanuts.
    Author: Dorner JW, Cole RJ.
    Journal: J Assoc Off Anal Chem; 1989; 72(6):962-4. PubMed ID: 2592317.
    Abstract:
    A study was conducted to evaluate the performance of 2 enzyme-linked immunosorbent assays (ELISA) for rapidly screening samples of peanuts for the presence of aflatoxin. The EZ-Screen Quick Card Test and the Afla-10 Cup Test were compared with liquid chromatography in duplicate analyses of common extracts of peanuts contaminated in the range of 0-70 ppb (ng/g). Each assay properly identified 95% of samples containing no detectable aflatoxin as negative and greater than 97% of samples containing greater than 10 ppb aflatoxin as positive. The card test, which had a 20 ppb detection threshold, identified as positive 32 of 34 samples in the 11-20 ppb range. This indicates that the card test might actually have a detection threshold closer to 10 ppb. Most of the errors associated with the assays occurred on samples containing less than 10 ppb aflatoxin. The cup and card tests identified 76 and 67% of the samples, respectively, as negative, in the range of 4-10 ppb. For samples either negative or contaminated above their detection thresholds for the assays, the methods are well suited for use as rapid screening tests.
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