食品科学 ›› 2012, Vol. 33 ›› Issue (10): 260-263.doi: 10.7506/spkx1002-6630-201210054

• 分析检测 • 上一篇    下一篇

电子自旋共振波谱法对干果类辐照食品的鉴定

宋业萍1,王传现2,*,杨振宇2,仲维科3,耿金培4,陆 地4,丁卓平1,*   

  1. 1.上海海洋大学食品学院 2.上海出入境检验检疫局 3.中国检验检疫科学研究院 4.烟台出入境检验检疫局
  • 出版日期:2012-05-25 发布日期:2012-05-07
  • 基金资助:
    国家质检公益性行业科研专项(200910142);上海市教育委员会学科建设资助项目(J50704)

Identification of Irradiated Dried Nuts by ESR Spectroscopy

SONG Ye-ping1,WANG Chuan-xian2,*,YANG Zhen-yu2,ZHONG Wei-ke3,GENG Jin-pei4,LU Di4,DING Zhuo-ping1,*   

  1. (1. College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China;2. Shanghai Entry-Exit Inspection and Quarantine Bureau, Shanghai 200135, China ;3. Chinese Academy of Inspection and Quarantine, Beijing 100025, China;4. Yantai Entry-Exit Inspection and Quarantine Bureau, Yantai 264000, China)
  • Online:2012-05-25 Published:2012-05-07

摘要: 研究电子自旋共振波谱法对干果类辐照食品的鉴定。分析开心果、核桃、桂圆的电子自旋共振波谱特征和样品干燥温度对信号强度的影响。结果表明:电子自旋共振特征峰信号强度与吸收剂量呈正相关,检测限为0.5kGy;进一步干燥时,开心果和核桃的最佳温度为40℃,桂圆的最佳温度为55℃;电子自旋共振特征峰的信号强度受微波功率影响,检测开心果、核桃、桂圆最佳的微波功率依次为0.59、0.37、0.24mW。通过电子自旋共振特征峰可判定干果是否经过辐照处理。

关键词: 电子自旋共振波谱, 干果, 辐照食品

Abstract: Electron spin resonance (ESR) spectroscopy is an effective method to identify irradiated dried nuts. In this experiment, ESR spectral characteristics of pistachio, walnut and longan were determined and the effect of drying temperature of samples on ESR signal intensity was also explored. The results showed that ESR signal intensity of characteristic peak was positively correlated with irradiation dose, and the detection limit of irradiation was 0.5 kGy. However, during further drying, the optimal temperature was 40 ℃ for pistachio and walnut, and 55 ℃ for longan. ESR signal intensity of characteristic peak was also affected by microwave power. The optimal microwave power were 0.59, 0.37 mW and 0.24 mW for pistachio, walnut and longan, respectively. Therefore, ESR characteristic peak can qualitatively determine the irradiation of dried nuts, which can provide a theoretical basis for detecting the dried nuts by ESR.

Key words: electron spin resonance, dried nuts, irradiated food

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