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Tracing the Source of Cooking Oils with an Integrated Approach of Using Stable Carbon Isotope and Fatty Acid Abundance
Liu, WG (Liu, Weiguo)[1,2]; Yang, H (Yang, Hong)[3]; Wang, Z (Wang, Zheng)[1]; Liu, JZ (Liu, Jinzhao)[2]
2012-08-15
Source PublicationJOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume60Issue:23Pages:8069-8073
Subtype期刊论文
Abstract

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 C-14/C-18 ratios between commercial vegetable oils refined from C-3 plants (from -35.7 to -27.0 parts per thousand and from 0 to 0.15) and animal oils (from -28.3 to -14.3 parts per thousand and from 0.1 to 0.6). Tested swill-cooked oils, which were generally refined by mixing with animal waste illegally, fall into a narrow delta C-13/fatty acid ratio distribution: from -25.9 to -24.1 parts per thousand and from 0.1 to 0.2. Our data demonstrate that the index of a cross-plotting between fatty acid delta C-13 values and C-14/C-18 ratios can be used to distinguish clean commercial cooking oils from illegal swill-cooked oils.

KeywordVegetable Oil Swill-cooked Oil Animal Fat Fatty Acid Carbon Isotope
DOI10.1021/jf302410b
Indexed BySCI ; EI
Language英语
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10103
Collection加速器质谱中心
Corresponding AuthorLiu, WG (Liu, Weiguo)[1,2]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment (IEE), Chinese Academy of Sciences (CAS),Xi’an 710075, People’s Republic of China;
2.School of Human Settlement and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China;
3.Department of Science and Technology, College of Arts and Sciences, Bryant University, Smithfield, Rhode Island 02917, UnitedStates
Recommended Citation
GB/T 7714
Liu, WG ,Yang, H ,Wang, Z ,et al. Tracing the Source of Cooking Oils with an Integrated Approach of Using Stable Carbon Isotope and Fatty Acid Abundance[J]. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,2012,60(23):8069-8073.
APA Liu, WG ,Yang, H ,Wang, Z ,&Liu, JZ .(2012).Tracing the Source of Cooking Oils with an Integrated Approach of Using Stable Carbon Isotope and Fatty Acid Abundance.JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,60(23),8069-8073.
MLA Liu, WG ,et al."Tracing the Source of Cooking Oils with an Integrated Approach of Using Stable Carbon Isotope and Fatty Acid Abundance".JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 60.23(2012):8069-8073.
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