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13C-IRIS: An Improved Method To Detect the Addition of Low Levels of C4-Derived Sugars to Juices

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A method to improve the detection of cane or corn sugar addition to fruit juices has been developed. This involves the isolation of the individual sugars and measurement of their carbon isotope ratios. Using the Isotopic Relations of Individual Sugars approach, the additions of cane sucrose or cane invert as low as 4% of the total sugars can be detected in orange juice. This method offers a significant improvement over the conventional carbon isotopic method that has a detection limit of about 10%.
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Document Type: Research Article

Affiliations: Reading Scientific Services Ltd, The Lord Zuckerman Research Centre, The University, Whiteknights, Reading, RG6 6LA, UK.

Publication date: 2001-05-01

More about this publication?
  • The Journal of AOAC INTERNATIONAL publishes refereed papers and reviews in the fields of chemical, biological and toxicological analytical chemistry for the purpose of showcasing the most precise, accurate and sensitive methods for analysis of foods, food additives, supplements and contaminants, cosmetics, drugs, toxins, hazardous substances, pesticides, feeds, fertilizers and the environment available at that point in time. The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory; better methods of preparing samples for analysis; collaborative studies substantiating the performance of a given method; statistical techniques for evaluating data. The Journal will also publish other articles of general interest to its audience, e.g., technical communications; cautionary notes; comments on techniques, apparatus, and reagents.
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