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Cleaning trials for corn containing aflatoxin
- Brekke, O.L., Peplinski, A.J., Griffin, E.L. Jr.
- Cereal chemistry 1975 v.52 no.2 pp. 198
- corn, Zea mays, on-farm food safety, field crops, field experimentation, food pathogens, Aspergillus flavus, toxigenic strains, secondary metabolites, aflatoxins, decontamination, cleaning, sanitizing, aflatoxin B1, provenance, grades, separation, food contamination
- Physical separation methods were generally ineffective for lowering the aflatoxin content of naturally contaminated corn used in the experimental work. The corn lots tested differed in aflatoxin content (10-450 parts/billion B1), geographic source, content of broken corn-foreign material, and represented both white and yellow corn. Dry cleaning, wet cleaning, density separation, and preferential fragmentation of the grain were used in the laboratory tests. Aflatoxin was concentrated in broken corn-foreign material in only 1 of the 10 lots tested. Hand-selected kernels that outwardly appeared sound and free of the bright greenish-yellow fluorescence associated with presence of aflatoxin had the toxin in excess of current guidelines (20 parts/billion) in 6 out of 7 lots of corn. The hand-selected kernels contained about one-half to as little as one-tenth the level of aflatoxin in the unfractionated lot.