Identification of Geographical Origin of Milk by Amino Acid Profile Coupled with Chemometric Analysis

Figure 2

OPLS-DA analysis based on amino acid ratios. (a) Score scatter plot of the OPLS-DA model for different geographical origins of milk samples. (b) Result of permutation test for OPLS-DA model (intercepts: R² = (0.0, 0.05); Q² = (0.0, −0.29)). (c) ROC curves and (d) VIP values of OPLS-DA.

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