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ESR法定量检测干果类辐照食品
引用本文:李伟明,哈益明,赵永富,张彦立.ESR法定量检测干果类辐照食品[J].核农学报,2011,25(2):281-285.
作者姓名:李伟明  哈益明  赵永富  张彦立
作者单位:1. 中国农业科学院农产品加工研究所,北京,100193
2. 江苏省农业科学研究院原子能农业利用研究所,江苏南京,210014
3. 中国计量科学研究院,北京,100013
基金项目:农业部公益性行业科技专项,国防科工局核能开发科研专项
摘    要:以葵花籽、核桃、开心果和榛子为试验材料,研究在0、1.0、3.0、5.0和10.0kGy剂量范围内4种样品辐照剂量与信号强度的关系以及相关性.结果表明:4种样品在辐照前后ESR波谱有明显区别,其信号强度与辐照剂量均呈正相关.辐照后样品的ESR强度和谱形都发生变化,应用ESR法能够鉴定4种食品是否经过辐照.其中核桃和开心...

关 键 词:ESR  信号强度  自由基  辐照剂量

QUANTITATIVE DETECTION OF ABSORBED DOSE OF IRRADIATED DRIED FRUIT BY ESR SPECTROSCOPY METHOD
LI Wei-ming,HA Yi-ming,ZHAO Yong-fu,ZHANG Yan-li.QUANTITATIVE DETECTION OF ABSORBED DOSE OF IRRADIATED DRIED FRUIT BY ESR SPECTROSCOPY METHOD[J].Acta Agriculturae Nucleatae Sinica,2011,25(2):281-285.
Authors:LI Wei-ming  HA Yi-ming  ZHAO Yong-fu  ZHANG Yan-li
Institution:Institute of Agro Food Science &; Technology, Chinese Academy of Agricultural Sciences, Beijing100193; Institute of Atomic Energy, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu210014; National Institute of Metrology P.R.China, Beijing100013
Abstract:Sunflower seeds, walnuts, pistachios, and hazelnuts were used as experimental materials which were irradiated at 1.0, 3.0, 5.0 and 10.0kGy, respectively. The relationships and correlations between ESR signal intensity and irradiation dosages were studied. The results showed that ESR spectra of irradiated samples were obviously different from that of CK, and the ESR signal intensity was positively related with the irradiation dose. After irradiation, the ESR intensity and spectrum shapes all changed, and all four samples were clearly identified irradiated or unirradiated. The appearances of the two weak satellite lines which situated left and right to the intense singlet line in walnuts and pistachios proved the existence of cellulose radical. The detection dose limit of irradiated walnut was 1kGy, and the detection limits of the other three samples were lower than 1kGy. In conclusion, the ESR method could be used to irradiated.
Keywords:ESR
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