With regard to the calibrations developed for groups of fatty
acids, standard errors for cross-validation obtained for SFA, MUFA
and PUFA (0.98, 1.47 and 0.88, respectively) were similar to those
cited for other Iberian pork products. Nevertheless, r2 values were
medium–high, showing values of 0.86, 0.53 and 0.61; for the estimation
of SFA, MUFA and PUFA, respectively. Cross-validation errors
and coefficients of determination for the three groups seem
to be influenced by the calibration statistics of their major individual
fatty acids (C16:0 and C18:0 for SFA; C18:1 for MUFA; and
C18:2 and C18:3 for PUFA), according to the data displayed in Table
2. These results confirm the feasibility of the estimation of SFA
contents in dry-cured sausages with NIR spectroscopy, however
further work is required to improve the predictive ability of the
calibrations obtained for MUFA and PUFA.