Performance de mesure de la composition en acides gras de la bavette de flanchet par spectroscopie proche infrarouge
Résumé
The aim of the study was to test the prediction performance of the fatty acid (FA) composition of beef (Rectus
abdominis, RA) with a NIRS (near infrared spectroscopy) equipment. In order to have a representative database of
French beef FA composition, 364 RA were sampled on carcasses from different rearing systems (dairy or beef ; young
bulls, cows, steers or heifers ; pasture, hay or corn silage with or without extruded linseed concentrates). FA
composition was assessed using gas chromatography and spectra were measured at wavelengths between 400 and
2500nm. The results show that NIRS accurately predicts several individual FA (16:0, 18:1d9cis) and FA groups (total
saturated, monounsaturated FA) (RPD>2.0). For other FA and especially polyunsaturated fatty acids (PUFA) n-6 or n-
3, the performances should still be improved for quantitative purposes.