60Coγ射线对谷物中3种真菌毒素含量的控制

摘要

Water solutions of aflatoxinB1, zearalenone, and ochratoxinA and contaminated rice and maize were irradiated by 60Co γ ray to study the degradation of three toxins using ELISA(enzyme-linked immuro sorbent assay). The degradation rates of aflatoxinB, , zearalenone and ochratoxinA in their water solutions wenl up with the increase of irradiation doses, being 95% , 90% and 11 % when the irradiation dose was 4 kGy, and being more than 94% , 90% and 60% when 6 kGy, and then changed slowly. In contaminated grains, the degradation rates of aflatoxinB1, zearalenone and ochratoxinA rose with the increase of irradiation doses, being 42% , 99% and 85% when the irradiation dose was 4 kGy, and being more than 84% when 6 kGy, and then kept stable. It indicated that aflatoxin B1, zearalenone and ochratoxinA could be degraded efficiently by γ ray irradiation.%以黄曲霉毒素B1、玉米赤霉烯酮和赭曲霉毒索A的纯品水溶液及受其污染的大米和玉米为材料,采用ELISA法检测毒素含量,研究60Co γ射线辐照对这3种毒素的降解效果.结果表明,纯品水溶液中3种毒素的降解率随辐照剂量的增加而增加,当辐照剂量为4 kGy时,黄曲霉毒素B1、玉米赤霉烯酮和赭曲霉毒素A的降解率分别达到95％、90％、11％,剂量为6 kGy时分别达到94％、90％和60％以上,此后降解率变化随辐照剂量的增加而趋于缓慢.大米中黄曲霉毒素B1和玉米中玉米赤霉烯酮、赭曲霉毒素A的降解率亦随辐照剂量的增加而增加,当辐照剂量为4 kGy时,黄曲霉毒素B1、玉米赤霉烯酮和赭曲霉毒素A的降解率分别达到42％、99％、85％,剂量为6kGy时均达到84％以上,此后降解率变化与溶液中的变化相似.以上结果表明γ射线辐照对这3种真菌毒素具有良好的降解效果.