Fig. 5
Partial least squares (PLS) scores plot for the first two PLS components of the original spectra (a) and second derivative spectra (b) over the 4000–650 cm−1 spectral region
Fig. 5 | Heritage Science
Partial least squares (PLS) scores plot for the first two PLS components of the original spectra (a) and second derivative spectra (b) over the 4000–650 cm−1 spectral region
