Document Detail

Application of a thermoluminescence method for the detection of irradiated spices.
MedLine Citation:
PMID:  12382723     Owner:  NLM     Status:  MEDLINE    
Food irradiation is extremely effective at reducing food-borne illness as well as losses caused by infestation and contamination. Despite the well-established regulations that permit irradiation to control pathogens in spices, there are no widespread methods to detect previously irradiated food. Therefore, it has become necessary to develop new detection and dose determination methods for food subjected previously to irradiation. The present work deals with the application of the thermoluminescence (TL) phenomenon to detect irradiated spices. The process is based upon the thermoluminescence properties exhibited by the polymineral content of the irradiated specimen. After separating the organic material, it is possible to extract some polymineral substances that are suitable for thermoluminescence analysis due to interaction of the spice to ionising radiation. The method was successfully applied to examine irradiated and non-irradiated paprika of Mexican origin. The spice was irradiated with gamma rays at doses of 5, 10 and 15 kGy. The separated thermoluminescent polymineral was found to be composed mainly of quartz and feldspar. The thermoluminescence glow curve of the irradiated specimen shows a wide band peaked 228, 268 and 336 degrees C, resembling closely the combined TL of quartz and feldspars. The method allows for the determination of the retrospective dose exposure.
S Gastélum; I Osuna; R Meléndrez; E Cruz-Zaragoza; V Chernov; T Calderón; M Barboza-Flores
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Radiation protection dosimetry     Volume:  101     ISSN:  0144-8420     ISO Abbreviation:  Radiat Prot Dosimetry     Publication Date:  2002  
Date Detail:
Created Date:  2002-10-17     Completed Date:  2003-04-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8109958     Medline TA:  Radiat Prot Dosimetry     Country:  England    
Other Details:
Languages:  eng     Pagination:  137-40     Citation Subset:  IM    
Programa de Maestría en Ciencias (Física), Universidad de Sonora, Hermosillo, México.
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MeSH Terms
Capsicum / chemistry*
Food Irradiation*
Gamma Rays*
Spices / analysis*
Thermoluminescent Dosimetry / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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