Vibrational Spectroscopies and Chemometry for Nondestructive Identification and Differentiation of Painting Binders

Figure 4

FT-NIR (a) and Raman (b) spectra of tragacanth gum-TG and Arabic gum-AG. Raman spectra are presented after background subtraction. Star symbols point to some specific spectral features discussed in the text. The assignments of the FT-NIR and Raman spectra are reported in Tables S7 and S8.

(a)

(b)