Aflatoxin occurrence in some white corn under loan, 1971. III. association with bright greenish-yellow fluorescence in corn
1975
Shotwell, O.L. | Goulden, M.L. | Jepson, A.M. | Kwolek, W.F. | Hesseltine, C.W.
Studies were made on the relation between the occurrence in white corn samples from 1283 truckloads of Commodity Credit Corporation corn delivered at an elevator in southeastern Missouri of bright greenish-yellow (BGY) fluorescence under UV light (365 nm) and the presence and levels of aflatoxin. Although numbers of BGY fluorescing particles were related to levels of aflatoxin, the BGY fluorescent test could not be used to determine levels of toxin. Of the 10 lb whole-kernel corn samples having at least one BGY fluorescing corn particle or kernel, 55% contained measurable aflatoxin; 28% contained >20 ppb (parts/billion) toxin, the present FDA guideline. The analytical method was sensitive to 1-3 ppb aflatoxin. Of the corn samples that had >20 fluorescing kernels and particles, 95% were contaminated with aflatoxin. 65% of them had >20 ppb toxin. Cracking corn before UV light (365 nm) inspection revealed more samples with BGY fluorescence, and 19% of these contained >1-3 ppb aflatoxin. [See FSTA (1975) 07 11M1293 for part II.]
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