Differentiation of dietary regimene of Iberian swine by means of isotopic analysis of carbon and sulphur in hepatic tissue

The aim of this work was to differentiate the feed received by Iberian swine during fattening (acorns, feed) and their breed (Iberian or White) using analysis of the stable isotopes of carbon (δ13C) and sulphur (δ34S) in liver tissue samples. The results obtained in the determination of δ34S, using a procedure in which organic and inorganic sulphur are converted into BaSO4 and the procedure that measures δ34S in samples of dried ground liver tissue were compared. Joint analysis of carbon (δ13C) and sulphur (δ34S) permits the differentiation of swine of different breeds receiving different diets (acorns or feed).