Figure 3

PCA score plot on first two PCs in second-derivative NIR spectra (a) and loadings of PCs (b). In score plot (a), percentages in parentheses of x- and y-axis titles are those of explained variables of corresponding PC.

PCA score plot on first two PCs in second-derivative NIR spectra (a) and loadings of PCs (b). In score plot (a), percentages in parentheses of x- and y-axis titles are those of explained variables of corresponding PC.