The cis-9, trans-11-CLA and trans-10, cis- 12-CLA isomers were identified with reference to methyl esters ofCLA (O-5507, Sigma-Aldrich, St. Louis, MO). The EPA reference (44864) was obtained from Fluka Industriasse (Zurich, Switzerland).
The cis-9, trans-11-CLA and trans-10, cis-12-CLA isomers were identified with reference tomethyl esters ofCLA (O-5507, Sigma-Aldrich, St. Louis,MO). The EPA reference (44864) was obtained fromFluka Industriasse (Zurich, Switzerland).