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 |