Comparison of the efficacy of conventional sorting methods for the removal of aflatoxin-contaminated peanuts
1998
Hirano, S. (Morinaga and Co. Ltd., Yokohama (Japan). Research Inst.) | Shimada, T. | Shima, T.
The efficacy of typical sorting methods which have been practically employed in industry for excluding aflatoxin-contaminated materials from peanuts was evaluated by determining aflatoxin concentration in the peanuts before and after sorting treatments. The efficacy of aflatoxin removal from peanuts varied from almost 0 to 100% depending on the methods used. The aflatoxin concentration in peanuts was most effectively reduced by the manual exclusion of deteriorated peanuts, such as moldy or worm-eaten nuts, based on visual inspection. The effective removal of aflatoxin by using a color sorter required precise tuning of the operating conditions. Sifting and air-fan sorting had no significant effect. In some eases, these sorting procedures, even in combined use, could not reduce the aflatoxin concentration in peanuts to below 10 ppb, which is the legal concentration limit under Japanese customs regulations
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