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. Author manuscript; available in PMC: 2021 Dec 17.
Published in final edited form as: Contact Context. 2021;2021:10.6084/m9.figshare.16417218. doi: 10.6084/m9.figshare.16417218

Figure 3.

Figure 3.

FTNIR spectrum of the center of Zone C (green) and the two spectra from Zone B. The difference between the Zone B and C spectra appears to be due to moisture content. (Water has a combination band at 5175 cm−1).