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Luminescence detection and dose assessment of irradiated Yerba Mate (Ilex paraguariensis) tea leaves

被引：5
|
作者：
Cruz-Zaragoza, E. [1 ]
Roman-Lopez, J. [1 ]
Ramos Cordoba, D. [1 ]
Furetta, C. [1 ]
Santiago, M. [2 ]
Marcazzo, J. [2 ]
机构：
[1] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico
[2] Univ Nacl Ctr Prov Buenos Aires, Inst Fis Arroyo Seco CIFICEN CONICET, RA-7000 Tandil, Argentina
来源：
APPLIED RADIATION AND ISOTOPES | 2015年 / 100卷
关键词：
Irradiated foodstuffs; Yerba Mate tea; Polyminerals; Thermoluminescence; Photoluminescence; THERMOLUMINESCENCE PROPERTIES; FOOD; IDENTIFICATION; SUPPLEMENTS; RADIATION; PAPRIKA; HERBS;
D O I：
10.1016/j.apradiso.2014.11.022
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Imported commercial samples of Yerba Mate (Ilex paraguariensis) tea leaves were characterized by thermoluminescence (TL) and photoluminescence (PSL) physical methods. Samples of Yerba Mate were irradiated between 0.5-50 Gy and 20 Gy-5 kGy gamma doses by using two different dose rates from Co-60 irradiators. The Electron Dispersive Analysis (EDS) shows that the inorganic fraction is mainly composed by quartz and Ca-feldspars minerals. These polyminerals show a good sensitivity to gamma radiation and to UV light (530 nm). Linear dose-response curves were obtained between 0.5 and 12 Gy at low dose-rate, and with 20 to 500 Gy at high dose-rate of gamma radiation. At higher doses (600 Gy) an apparent slow saturation effect was observed. Low fading of the U signal was found. The detection limits of TL and PSL are 6 Gy and 300 Gy, respectively. Results show that luminescence emission (TL and PSL) is a reliable method for detection of irradiation Yerba Mate. (C) 2014 Elsevier Ltd. All rights reserved.
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页码：75 / 78
页数：4
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