[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 - 10 kGy, left peak was the characteristic peak for quantitation and the detection limit was < or = 0.5 kGy. It was difficult to quantitate when the absorbed dose was over 10 kGy. ESR characteristic peak and g factor were able to qualitatively determine the irradiation of abalone.


CONCLUSIONS
ESR spectroscopy is an effective method to determine whether the abalone being irradiated or not.
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China. songyeping86@163.com
Yeping
Y
Song
Chuanxian
C
Wang
Zhenyu
Z
Yang
Weike
W
Zhong
Jinpei
J
Geng
Di
D
Lu
Zhuoping
Z
Ding
D000818:Animals; D004578:Electron Spin Resonance Spectroscopy; D005514:Food Irradiation; D049851:Gastropoda; D017747:Seafood