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. Author manuscript; available in PMC: 2021 Mar 15.
Published in final edited form as: Acta Biomater. 2020 Jan 13;105:280–289. doi: 10.1016/j.actbio.2020.01.007

Table 2:

Relevant FT-IR characteristic group frequencies

Functional Group Absorption Range (cm−1)
OH st 3200-3650
H2O 3000-3700
Amines
N-H st 3300-3500
NH2δ 1550-1650
Carboxylic Acids
COO-H st 2500-3550
C=O st 1650-1800
Phosphates
v3PO4 1000-1150
v1PO4 ~950
v4PO4 500-620
v2PO4 400-470