电子自旋共振波谱法对鲍鱼的辐照鉴定研究

目的建立检测鉴定辐照鲍鱼的电子自旋共振(ESR)波谱法。方法采用电子自旋共振波谱法研究辐照鲍鱼ESR波谱特征和定量特征峰。结果未经辐照和辐照鲍鱼ESR图谱差异明显;未经辐照鲍鱼的g值范围:g=2.0055～2.0060;辐照鲍鱼的g1值范围:g1=(2.0027±0.0001),g2值范围:g2=(1.9994±0.0001);在0.5～10kGy范围内,ESR特征峰信号强度与吸收剂量成正相关,左侧峰为定量特征峰,检测限≤0.5kGy;吸收剂量高于10kGy时则难以定量;ESR特征峰和g值可定性判定鲍鱼是否经过辐照处理。结论 ESR波谱法是鉴定辐照鲍鱼的有效方法。

Identification of irradiated abalone by ESR spectroscopy

Objective To establish an analytical method for the detection and identification of irradiated abalone by electron spin resonance spectroscopy.Methods Electron spin resonance(ESR) was used to study the spectral characteristics of abalone and the characteristic peak for quantitation.Results There were obvious different ESR spectra between unirradiated and irradiated abalone.The g factor for unirradiated abalone was 2.0055-2.0060,the g1 and g2 factor for irradiated abalone were(2.0027±0.0001) and(1.9994±0.0001),respectively.The ESR signal intensity of characteristic peak was positively correlated with absorbed dose in the range of 0.5-10kGy,left peak was the characteristic peak for quantitation and the detection limit was ≤0.5kGy.It was difficult to quantitate when the absorbed dose was over 10kGy.ESR characteristic peak and g factor were able to qualitatively determine the irradiation of abalone.Conclusion ESR spectroscopy is an effective method to determine whether the abalone being irradiated or not.