Table 2 Correlation between de extracted IR principal components.

From: Linking structural and compositional changes in archaeological human bone collagen: an FTIR-ATR approach

 

Cp1

Cp2

Cp3

Cp4

Coll_yield

0.42

0.21

0.41

− 0.22

CI

0.07

− 0.14

− 0.41

0.31

PGI

0.98

− 0.11

0.02

0.10

C

− 0.93

0.05

0.11

0.09

N

− 0.92

0.08

0.13

0.08

C:N

0.73

0.18

− 0.21

− 0.06

δ13C

0.00

− 0.15

− 0.09

0.17

δ 15N

0.23

− 0.07

− 0.17

0.18

  1. Collagen yield (Coll_yield), IR indices (CI and PGI), elemental composition (C and N), C:N molar ratios and isotopic composition of the collagen.
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