The fate of aflatoxin B1 (AFB1), a mycotoxin known to occur in polished rice, during rice cooking was evaluated to determine reduction in AFB1 residues and mutagenic potentials. The amounts of AFB1 in three lots of naturally contaminated polished rice from Korea were analyzed by high-performance liquid chromatography after washing and after steaming. An in vitro mutagenicity assay with Salmonella Typhimurium TA100 was used to confirm the results of the chemical analyses. Cooking significantly reduced AFB1 (mean reduction, 34%) in naturally contaminated polished rice and reduced mutagenicity by ca. 27%. Processing factors (reflecting the removal of AFB1 residues during processing) for cooked rice were estimated at 0.66 to 0.73, as determined chemically and toxicologically, respectively. The revised Korean provisional daily intake of AFB1 from consumption of rice as a dietary staple (0.58 to 3.94 ng/kg of body weight per day) is still higher than that reported for foods in general in the United States (0.26 ng/kg of body weight per day). Thus, Koreans probably consume higher amounts of foodborne AFB1 than do Americans and thus are at higher risk for AFB1-induced health consequences.
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Research Article| July 01 2005
Fate of Aflatoxin B1 during the Cooking of Korean Polished Rice
JE WON PARK;
JE WON PARK *
1Graduate School of Biotechnology, Korea University, Seoul 136-701, Korea
* Author for correspondence. Present address: Food Research Division, Health Products and Food Branch, Health Canada 2203D, Ottawa, Ontario, Canada K1A 0L2. Tel: 613-957-0979; Fax: 613-941-4775; E-mail: Je_Park@hc-sc.gc.ca.
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JE WON PARK, CHAN LEE, YOUNG-BAE KIM; Fate of Aflatoxin B1 during the Cooking of Korean Polished Rice. J Food Prot 1 July 2005; 68 (7): 1431–1434. doi: https://doi.org/10.4315/0362-028X-68.7.1431
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