The wavenumber
regions for PCA were also optimized. Finally, the wavenumbers of 1200–
1000 cm−1 were chosen due to its capability to provide good separation
among evaluated samples. Fig. 3 demonstrates the score plot of PCA of
lard and beef fat in meatball broth, representing the projection of samples
defined by the first principle component (PC 1) and the second principle
component (PC 2).