Document Detail


Tracing the source of cooking oils with an integrated approach of using stable carbon isotope and fatty acid abundance.
MedLine Citation:
PMID:  22813234     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
We report a new approach to identify swill-cooked oils that are recycled from tainted food and livestock waste from commercial vegetable and animal oils by means of carbon isotope values and relative abundance of fatty acids. We test this method using 40 cooking oil samples of different types with known sources. We found significant differences in both total organic carbon isotope as well as compound-specific isotope values and fatty acid C14/C18 ratios between commercial vegetable oils refined from C3 plants (-35.7‰ - -27.0‰; 0-0.15) and animal oils (-28.3‰ - -14.3‰; 0.1-0.6). Tested swill-cooked oils, which were generally refined by mixing with animal waste illegally, fall into a narrow δ13C/fatty acid ratio distribution: -25.9‰ - -24.1‰; 0.1-0.2. Our data demonstrate that the index of a cross plotting between fatty acid δ13C values and C14/C18 ratios can be used to distinguish clean commercial cooking oils from illegal swill-cooked oils.
Authors:
Weiguo Liu; Hong Yang; Zheng Wang; Jinzhao Liu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-19
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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