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This project proposes the collection of carbon stable isotope data from poultrymeat samples, obtained from controlled feeding regime, to provide a database with which to verify the claim that poultry meat was from birds that have been corn-fed.
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After validation, it is intended to examine a number of commercial products to test the applicability of the method on 'real' samples. The successful conclusion of this project may allow the FSA to conduct a surveillance exercise to assess the authenticity of poultrymeat sold in the UK that is labelled corn-fed.
The Poultrymeat (Marketing Standards) Regulations allow optional indications of certain farming methods, often referred to as Special Marketing Terms (SMTs). The only feed SMTs for poultrymeat are: fed with x % (for example, fed with 50% corn) or oats fed goose. <P>
Although the term 'corn-fed' alone is not recognised by the Regulations, it is commonly used, and is understood to mean that the feed given during the greater part of the fattening period contains at least 50% corn (maize). A method of analysis is required for verification of claims of this type.
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The study intends to use carbon stable isotopes to identify ratios of isotopes that indicate chickens have been corn-fed. The stable carbon isotopes are utilised as the ratio of C13 and C12 isotopes reflects the type of feed fed to chickens. In turn this will influence the ratio of isotopes found in the poultry meat. A corn-fed chicken would have a lower ratio of C13 to C12 than chickens fed a feed based on other grains.
<p>Find more about this project and other FSA food safety-related projects at the <a href="http://www.food.gov.uk/science/research/" target="_blank">Food Standards Agency Research webpage</a>.