|
KMID : 1007520120210030853
|
|
Food Science and Biotechnology
2012 Volume.21 No. 3 p.853 ~ p.858
|
|
|
Inter-laboratory Study to Define the Temperature Interval for a Thermoluminescence Heating Unit Used to Identify Irradiated Food
|
|
Ahn Jae-Jun
Kashif Akram
Baek Ji-Yeong
Kim Yeon-Joo
Kim Moon-Young
Jeong Il-Yun
Kwon Joong-Ho
|
|
|
Abstract
|
|
|
|
EN 1788:2001 suggests defining the temperature range for the thermoluminescence (TL) heating unit to calculate the TL ratio (TL1/TL2). In the present study, practical temperature ranges were established by using well-characterized lithium fluoride (LiF, TLD-100®) at 4 different research institutes in Korea. Temperature ranges differed according to models of TLD heating unit, which were wide in the case of RISØ (160-249°C) as compared with Harshaw (155-232oC) TLD readers. The silicate minerals separated from irradiated turmeric samples were measured to check these intervals on a practical basis. The X-ray diffraction (XRD) analysis of separated minerals showed that quartz and feldspar minerals were the main source of well-characterized TL glow curve following irradiation. The TL glow peaks from the separated minerals were narrower in Harshaw than RISØ TLD readers. The TL ratios determined after re-irradiation (1 kGy) for the tested minerals, using the pre-defined temperature intervals, provided the satisfactory results.
|
|
|
KEYWORD
|
|
|
irradiation, identification, lithium fluoride, turmeric
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
 
|