Keywords
milk
fumonisin B1
aflatoxin B1
aflatoxin M1
gamma-irradiation
How to Cite
Abstract
Fumonisin B1 is a mycotoxin produced by Fusarium verticillioides and Fusarium proliferatum, and it is found chiefly in corn and corn-based products. Since its discovery fumonisin B1 has been associated with diseases in animals, such as leukoencephalomalacia in horses, and pulmonary edema in swine. On humans, the ingestion of foods with fumonisin B1 is associated with esophageal cancer. Aflatoxin M1 is the principal hydroxylated metabolite occurring in milk from animals which have consumed aflatoxin B1-contaminated feeds. It is also present in milk from nursing mothers who consumed foodstuffs with aflatoxin B1. In this study the effect of gamma-irradiation (60Co) was verified, in doses ranged from 0 to 20 kGy, in order to inactivate fumonisin B1 in corn flour and aflatoxin M1 in fluid and powdered milk. Fumonisin B1 was extracted from the samples with methanol:water (3:1). The extract was purified through immunoaffinity column followed by separation and quantification by means of high-performance liquid chromatography (HPLC) with o-phthaldialdehyde (OPA). For determining aflatoxin M1 the purification was done through immunoaffinity column followed by separation and quantification by means of HPLC with fluorescence detector. Gamma irradiation (60Co) at doses from 3 to 20 kGy reduced the fumonisin B1 content in a range of 11.2 % to 55.5 %. Gamma irradiation (60Co) at 20 kGy dose reduced aflatoxin M1 concentration in 86.8 % and 37.9 %, in milk fluid and powdered milk, respectively.References
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