| Food sciences |
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| Detection of irradiated rose tea based on electron spin resonance (ESR) technology |
| ZHAO Xiao-jun,FU Jun-jie,TAN Yuan-yuan,WANG Zhi-ping |
| ZHAO Xiao-jun,Institute of Nuclear Agricultural Sciences/Key Laboratory for Nuclear-Agricultural Sciences of Ministry of Agriculture,College of Agriculture and Biotechnology,Zhejiang University,Hangzhou310029,China FU Jun-jie,Institute of Nuclear Agricultural Sciences/Key Laboratory for Nuclear-Agricultural Sciences of Ministry of Agriculture,College of Agriculture and Biotechnology,Zhejiang University,Hangzhou310029,China TAN Yuan-yuan,Institute of Nuclear Agricultural Sciences/Key Laboratory for Nuclear-Agricultural Sciences of Ministry of Agriculture,College of Agriculture and Biotechnology,Zhejiang University,Hangzhou310029,China WANG Zhi-ping,Institute of Nuclear Agricultural Sciences/Key Laboratory for Nuclear-Agricultural Sciences of Ministry of Agriculture,College of Agriculture and Biotechnology,Zhejiang University,Hangzhou310029,China |
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Abstract The characteristic of ESR spectrum of rose tea irradiated by 60Co-γray at different doses was studied . The relationship of ESR signal intensity with irradiation doses,and storage time with peak value,respectively,was also discussed . The result showed that the ESR spectrums were obviously different at the presence or absence of irradiation . The ESR signal intensity increased with the increasing of irradiation dose,but decreased with the expanding of storage time with a linear correlation . The ESR signal intensity was weakened gradually during the store at room temperature for120 days,but the ESR signal could be still detected,which could be used to easily distinguish irradiated rose tea samples from those unirradiated .
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Published: 09 November 2010
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基于电子自旋共振(ESR)技术检测辐照玫瑰花茶
研究玫瑰花茶经60Co-γ射线不同剂量辐照诱导的电子自旋共振(ESR)波谱特征、辐照剂量与 信号强度、贮存时间与峰值之间的相互关系 。结果表明 :辐照前后 ESR波谱峰值有明显差异,ESR信号 强度随辐照样品吸收剂量的增加而增强,随贮存时间的增加而减弱,且呈线性相关 ;样品在室温下保存 120 d,ESR信号强度虽逐渐减弱,但信号不会消失 。据此可以判别区分辐照与未辐照的玫瑰花茶样品 。
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