Detection of prior irradiation of dried fruits by electron spin resonance (ESR)

被引:17
|
作者
Esteves, MP
Andrade, ME
Empis, J
机构
[1] Univ Tecn Lisboa, Inst Super Tecn, P-1096 Lisbon, Portugal
[2] INETI, IBQTA, Unidade Microbiol Ind & Bioproc, P-1699 Lisbon, Portugal
[3] Inst Tecnol & Nucl, P-2685 Sacavem, Portugal
关键词
food irradiation; detection; cellulose; sugar; ESR;
D O I
10.1016/S0969-806X(99)00304-7
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Dried almonds, raisins, dates and pistachio were irradiated using either gamma radiation or electron beam, at an average absorbed dose of 5 kGy. To detect the previous irradiation different parts of the dried fruits were analyzed by ESR spectroscopy: almonds: skin; raisins: dried pulp; dates: dried pulp and stone; pistachio: nutshell. Analyses were carried out 2-3 months and 6 months after irradiation. A series of signals tentatively described as "cellulose-like", "sugar-like" and "complex" radical were observed, and some slight differences between spectra from samples irradiated with gamma rays and electrons were evident. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:737 / 742
页数:6
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