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Table 4 Interpretation of FT- IR spectra of isolated inulin

From: Optimization of inulin production process parameters using response surface methodology

Wave number cm−1 IR bands cm−1 Interpretation
3200–3400 3361 ν О–Н (ОН); intermolecular H-bonds
2933–2981 2931 ν C–Has(CH2)
2850–2904 2880 ν C–Hs(CH2)
1664–1634 1635 Absorption of water
1416–1430 1430 δC–Hs(CH2)
1335 –1336 1336 βO-H(ОН)
1225–1235 1220 βO-H (ОН)
1125–1162 1135 νC–O–Cas (C–O–C)
1015–1060 1031 νC–O (C–O)
C–O
985–996 987 νC–O (C–O)
930 935 α-D-Glcp residue in chain
892–895
874
873
873
Anomeric bendings δ(C1–H), ring vibration (2-ketofuranose)
818 820 2-ketose