Document Detail

Changing carbon isotope ratio of atmospheric carbon dioxide: implications for food authentication.
MedLine Citation:
PMID:  20121108     Owner:  NLM     Status:  MEDLINE    
Carbon isotopes are often used to detect the addition of foreign sugars to foods. This technique takes advantage of the natural difference in carbon isotope ratio between C(3) and C(4) plants. Many foods are derived from C(3) plants, but the low-cost sweeteners corn and sugar cane are C(4) plants. Most adulteration studies do not take into account the secular shift of the carbon isotope ratio of atmospheric carbon dioxide caused by fossil fuel burning, a shift also seen in plant tissues. As a result statistical tests and threshold values that evaluate authenticity of foods based on carbon isotope ratios may need to be corrected for changing atmospheric isotope values. Literature and new data show that the atmospheric trend in carbon isotopes is seen in a 36-year data set of maple syrup analyses (n = 246), demonstrating that published thresholds for cane or corn sugar adulteration in maple syrup (and other foods) have become progressively more lenient over time.
William H Peck; Stephanie C Tubman
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  58     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-02-17     Completed Date:  2010-05-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2364-7     Citation Subset:  IM    
Department of Geology, Colgate University, Hamilton, New York 13346, USA.
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MeSH Terms
Acer / chemistry
Air / analysis*
Calcium Carbonate / analysis
Carbohydrates / analysis
Carbon Isotopes / analysis*
Food / standards*
Food Contamination
Fossil Fuels
Plants / chemistry
Sweetening Agents / analysis
Reg. No./Substance:
0/Carbohydrates; 0/Carbon Isotopes; 0/Fossil Fuels; 0/Sweetening Agents; 471-34-1/Calcium Carbonate

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