共 50 条
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
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.
引用
收藏
页码:75 / 78
页数:4
相关论文