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Multistep Identification of γ-Irradiated Boiled-Dried Anchovies by Analysis of Thermoluminescence, Electron Spin Resonance, Hydrocarbon and 2-Alkylcyclobutanone

건멸치의 방사선 조사 확인을 위한 열발광, 전자스핀공명, Hydrocarbon 및 2-Alkylcyclobutanone의 다중분석

  • Published : 2003.02.01

Abstract

Multistep detection was peformed to identify irradiated dried anchovy. In thermoluminescence (TL) analysis, non-irradiated samples represented a lower peak at about 28$0^{\circ}C$, but irradiated samples showed a higher peak at around 20$0^{\circ}C$. The normalization with a re-irradiation step at 1 kGy could verify the identification results. Electron spin resonance (ESR) spectroscopy for bones separated from irradiated anchovy revealed specific signals (g=2.002,1.998) derived from a hydroxyapatite radical, which intensities were in proportion to the irradiation doses and still detectable even after 6 months of storage at -2$0^{\circ}C$. Six kinds of hydrocarbons (HC) were observed in dried anchovy samples and 1,7-hexadecadiene and 1-hexadecene were only detected in irradiated anchovy at 1 kGy or more. Also among 3 kinds of radiation-induced 2-alkylcyclobutanones (2-ACB) observed, 2-dodecylcy-clobutanone and 2-tetradecylcyclobutanone were unique in irradiated anchovy. As a result, the concentration of radiation-induced HCs and 2-ACBs were dependent on the irradiation dose and detectable after 6 months of storage. However, TL and ESR analyses were found simpler than the other methods for identification of irradiated boiled-dried anchovy.

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