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Stable isotope ratio analysis for authentication of lamb meat
E Piasentier1, R Valusso, F Camin
1Dipartimento di Scienze della Produzione Animale, Università di Udine, Via S. Mauro 2, 33010 Pagnacco (Udine), Italy.
Meat Science
|November 9, 2011
Summary
Stable isotope ratio analysis effectively authenticates lamb meat origin and feeding. This method accurately distinguishes lamb types based on diet and geographical provenance, ensuring product authenticity.
Area of Science:
- Food Science
- Analytical Chemistry
- Agricultural Science
Background:
- Authenticating lamb meat origin and feeding practices is crucial for consumer trust and regulatory compliance.
- Traditional methods for authentication can be limited in scope and accuracy.
- Stable isotope ratio analysis offers a promising alternative for detailed product traceability.
Purpose of the Study:
- To evaluate the effectiveness of stable isotope ratio analysis (carbon-13/carbon-12 and nitrogen-15/nitrogen-14) in authenticating lamb meat.
- To determine if isotope ratios can differentiate lamb based on geographical origin and feeding regime.
- To assess the potential of isotope analysis for characterizing lamb diet and provenance.
Main Methods:
- Isotope ratio mass spectrometry (IRMS) was used to measure carbon and nitrogen stable isotope ratios in lamb meat fractions.
- Meat samples from 12 lamb types across six European countries, representing three feeding regimes, were analyzed.
- Canonical discriminant analysis and K-means clustering were employed to classify lamb meat based on isotope data.
Main Results:
- Stable isotope ratios (δ(13)C and δ(15)N) in lamb meat fractions showed significant variations related to feeding regime and geographical origin.
- Feeding regime was accurately identified with 91.7% correct classification, highlighting its strong influence on isotope signatures.
- Geographical origin was distinguished with 79.2% accuracy, and combined origin-diet classification achieved good resolution of specific lamb types.
Conclusions:
- Multielement stable isotope analysis is a promising and reliable tool for authenticating lamb meat, similar to its application in other food products.
- The method effectively characterizes lamb diet and geographical provenance, supporting traceability and quality assurance.
- Isotope ratio analysis provides a robust scientific basis for verifying lamb meat authenticity and differentiating production systems.
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