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Aflatoxin content of peanut hulls
Author(s) -
Sanders Timothy H.,
McMeans Jack L.,
Davidson J. I.
Publication year - 1984
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02540811
Subject(s) - aflatoxin , aspergillus flavus , mycotoxin , food science , rice hulls , chemistry , mathematics , horticulture , botany , biology
Abstract The degree of aflatoxin contamination in peanut hulls was determined by analyzing inoculated hand‐shelled hulls and hulls from peanuts known to contain aflatoxin. Hulls adjusted to 20% moisture, inoculated with Aspergillus flavus , and incubated 7 days at 25 C supported growth of A. flavus but not aflatoxin production. Peanuts from 20 selected Segregation III (visible A. flavus ) lots contained 13–353 ppb of aflatoxin. The machine‐shelled hulls from these lots were analyzed and 3 lots contained no detectable aflatoxin, 13 lots contained 4–88 ppb and 4 lots contained >116 ppb. Aflatoxin concentrations of 53–87 ppb were detected in hulls when peanuts containing relatively high levels of aflatoxin (up to 26.8 ppm in damaged kernels) were carefully machine‐shelled. Hulls from the same samples obtained by hand‐shelling contained no detectable aflatoxin. When machine‐shelled hulls were screened through successively smaller screens, the aflatoxin concentration of the smallest fraction (<3.18 mm) was always highest and indicated that small peanut kernels and peanut parts in the hulls actually contained the aflatoxin. Separating hulls over a 4.76 mm round‐hole screen appeared to provide a means of removal of most aflatoxin in peanut hulls. No aflatoxin was found in hulls from uncontaminated peanuts.