Document Detail

Comparison of radiation-induced hydrocarbons for the identification of irradiated perilla and sesame seeds of different origins.
MedLine Citation:
PMID:  20355008     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Perilla and sesame seeds, a rich source of energy, are commonly utilized in different forms in many countries. During the post-harvest period, they are contaminated with insects as well as microbes that may have importance for keeping quality and quarantine, and thus they can be treated with ionizing radiation for insect disinfestation and microbial decontamination. Reliable and routine methods to identify whether or not a food has been irradiated are needed to help consumers' understanding of irradiated food and promote international trade. In the present study, fat-derived hydrocarbons from irradiated perilla seeds and sesame seeds of Korean and Chinese origin were analyzed in order to identify irradiation treatment by comparing their properties during the post-irradiation period. RESULTS: Gas chromatographic-mass spectrometric analysis showed that several saturated hydrocarbons, such as tetradecane, pentadecane, hexadecane and heptadecane, were found in the non-irradiated control samples, while four radiation-induced unsaturated hydrocarbons (R(2) = 0.647-0.997), such as 1,7,10-hexadecatriene (C(16:3)), 1,7-hexadecadiene (C(16:2)), 6,9-heptadecadiene (C(17:2)) and 8-heptadecene (C(17:1)), were detected in all irradiated samples at 0.5 kGy or higher, with variations according to sample and origin. Concentrations of all hydrocarbons were reduced during storage and could not be detected in 0.5 kGy irradiated Chinese sample of either seed after 8 months.CONCLUSION: Radiation-induced hydrocarbons (C(16:3, 16:2, 17:2, 17:1)) could be used as markers to identify irradiated perilla and sesame seeds of both Korean and Chinese origin at 1 kGy or higher for 8 months' storage at room temperature.
Mi-Ok Kim; Joong-Ho Kwon; Ijaz A Bhatti
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of the science of food and agriculture     Volume:  90     ISSN:  1097-0010     ISO Abbreviation:  J. Sci. Food Agric.     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2010-03-31     Completed Date:  2010-10-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376334     Medline TA:  J Sci Food Agric     Country:  England    
Other Details:
Languages:  eng     Pagination:  30-5     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2009 Society of Chemical Industry.
Department of Health and Diet, Daegu Health College, Daegu 702-722, Korea.
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MeSH Terms
Food Handling
Food Irradiation*
Food Microbiology
Food Preservation / methods*
Gas Chromatography-Mass Spectrometry
Hydrocarbons / analysis*
Insects / radiation effects
Perilla / chemistry,  radiation effects*
Radiation, Ionizing
Seeds / chemistry,  radiation effects*
Sesamum / chemistry,  radiation effects*
Reg. No./Substance:

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