含纤维素辐照食品的ESR法研究  

Study on identification of irradiated food containing cellulose by ESR

作　　者：万小娟[1] 王佳[2] 郑建飞[2] 窦大营[1] 徐刚[1] 焦正[1] 吴明红[2] 丁国际[2] 

机构地区：[1]上海大学射线应用研究所,上海201800 [2]上海大学环境与化学工程学院,上海200072

出　　处：《核技术》2008年第8期629-632,共4页Nuclear Techniques

基　　金：国家自然科学基金(50578090)资助

摘　　要：60Co发出的γ射线于0,0.5,1.0,3.0,5.0,10.0kGy剂量范围对干燥的红辣椒粉、花生和提取出的草莓籽进行了辐照处理,用电子自旋共振(Electron spin resonance,ESR)来分析研究信号强度与辐照剂量的关系以及相关性R2。结果表明,三种样品的ESR信号与剂量正相关,其中草莓的ESR信号随剂量增长最慢,红辣椒粉的计算最为精确,花生的次之。含纤维素辐照食品的剂量与ESR信号关系清晰,可作为建立ESR方法检测辐照食品的方法。The fast development and application of food irradiation technology signify the necessity and urgency to research on effective detection method for irradiated food. In this paper, we report a preliminary study in this area with dried chili powder, peanuts and strawberry seeds. The food samples were irradiated to 0.5, 1.0, 3.0, 5.0 and 10.0 kGy by ^60Co gamma rays. The relation between ESR intensity and irradiation dose, and correlation R^2, were studied. The results showed that the ESR signal intensity is positively related with the dose. ESR intensity of the strawberry increased the slowest with the dose, and the chili powder had the most accurate calculation. Accurate dose-effect curves, however, require repeating tests and further studies are needed to verify the ESR results.

关 键 词：电子自旋共振 辐照剂量 自由基 剂量效应曲线 

分 类 号：TL751[核科学技术—辐射防护及环境保护] TL75