辐射加工食品中吸收剂量的估算——1. 通过线性回归分析对电子顺磁共振响应函数进行测试。

Estimation of the absorbed dose in radiation-processed food--1. Test of the EPR response function by a linear regression analysis.

作者信息

Desrosiers M F, Wilson G L, Hunter C R, Hutton D R

机构信息

Center for Radiation Research, National Institute for Standards and Technology, Gaithersburg, MD 20899.

出版信息

Int J Rad Appl Instrum A. 1991;42(7):613-6. doi: 10.1016/0883-2889(91)90030-5.

DOI:10.1016/0883-2889(91)90030-5

PMID:1663095

Abstract

Free radicals produced in chicken bone tissue by 137Cs gamma-rays were measured using electron paramagnetic resonance spectroscopy. The yield of radicals was found to be proportional to the absorbed dose. Additive re-irradiation of previously irradiated bones is the basis of a method to estimate the absorbed dose in radiation-processed foods. The ability of the method to provide accurate dose assessments for a range of doses (0.5-7.4 kGy) is tested here. A linear fit to the data yields reasonable dose estimates for bone irradiated less than 2 kGy, but fails at the higher doses using a linear approximation to the dose response. These data and their implications are discussed.

摘要

利用电子顺磁共振波谱法测量了¹³⁷Csγ射线在鸡骨组织中产生的自由基。发现自由基的产额与吸收剂量成正比。对先前辐照过的骨头进行附加再辐照是估算辐射加工食品中吸收剂量的一种方法的基础。本文测试了该方法对一系列剂量（0.5 - 7.4 kGy）提供准确剂量评估的能力。对数据进行线性拟合，对于辐照剂量小于2 kGy的骨头能得出合理的剂量估计值，但在较高剂量下使用剂量响应的线性近似则不适用。讨论了这些数据及其影响。