Journal
FOOD CHEMISTRY
Volume 192, Issue -, Pages 997-1005Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.07.121
Keywords
Lamb meat; Extensive; Stable isotope ratios; Geographical origin
Funding
- South African Research Chairs Initiative of the Department of Science and Technology
- National Research Foundation of South Africa
- Meat Industry Trust (South Africa)
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Stable isotope ratios (C-13/C-12 and N-15/N-14) of South African Dorper lambs from farms with different vegetation types were measured by isotope ratio mass spectrometry (IRMS), to evaluate it as a tool for the authentication of origin and feeding regime. Homogenised and defatted meat of the Longissimus lumborum (LL) muscle of lambs from seven different farms was assessed. The delta C-13 values were affected by the origin of the meat, mainly reflecting the diet. The Miens and Free State farms had the lowest (p <= 0.05) delta N-15 values, followed by the Northern Cape farms, with Hantam Karoo/Calvinia having the highest delta N-15 values. Discriminant analysis showed delta C-13 and delta N-15 differences as promising results for the use of IRMS as a reliable analytical tool for lamb meat authentication. The results suggest that diet, linked to origin, is an important factor to consider regarding region of origin classification for South African lamb. (C) 2015 Elsevier Ltd. All rights reserved.
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