Figure 5.

(a) PCA score plot of all average oil-in-aqueous mint extract emulsion NIR spectra after MSC preprocessing ( PEG 1500, PEG 6000, PEG 20,000). (b) PCA loading of all average oil-in-aqueous mint extract emulsion NIR spectra after MSC preprocessing. PCA score plot of NIR spectra of oil-in-aqueous mint extract emulsion NIR spectra after SNV preprocessing with (c) PEG 1500, (e) PEG 6000, and (g) PEG 20,000 ( 2% emulsifier, 4% emulsifier, 6% emulsifier). PCA loading of NIR spectra of oil-in-aqueous mint extract emulsion NIR spectra after SNV preprocessing with (d) PEG 1500, (f) PEG 6000, and (h) PEG 20,000.