SONG Yeping1 WANG Chuanxian2 HUANG Fan1 YANG Zhenyu2 ZHONG Weike3 GENG Jinpei4 LU Di4 DING Zhuoping1 1. Study on the method of identification of irradiated polypropylene by ESR spectroscopy[J]. Nuclear techniques, 2011, 34(11): 823-827.
SONG Yeping1 WANG Chuanxian2 HUANG Fan1 YANG Zhenyu2 ZHONG Weike3 GENG Jinpei4 LU Di4 DING Zhuoping1 1. Study on the method of identification of irradiated polypropylene by ESR spectroscopy[J]. Nuclear techniques, 2011, 34(11): 823-827.DOI:
Study on the method of identification of irradiated polypropylene by ESR spectroscopy
Electron spin resonance(ESR) signals were detected from irradiated polypropylene
which is widely used as packing material of food products.Optimum conditions were investigated for identifying irradiated food indirectly using ESR spectroscopy.From the ESR spectra
the g1
g2 and g3 factors for irradiated polypropylene were 2.0350±0.0002
2.0089±0.0002 and 2.0052±0.0002
respectively.ESR intensity of irradiated polypropylene was positively correlated with microware power
modulation amplitude and absorbed dose
and the detection limit was 0.5 kGy within 30 days post irradiation.The study provides a basis for identifying irradiated food products packed by polypropylene.