Table 3. Fourier transform infrared spectroscopy (FTIR) band assignments for the main groups found in the spectrum of common bean lipid fractions from the North-East and South-West of Romania (CBO-NE and CBO-SW, respectively) and for the corresponding β-cyclodextrin complexes (β-CD/CBO-NE and β-CD/CBO-SW, respectively).
| Band assignment related to common bean lipid fractions | CBO-NE Wavenumber (cm-1) |
CBO-SW Wavenumber (cm-1) |
β-CD/CBO-NE complex Wavenumber (cm-1) |
β-CD/CBO-SW complex Wavenumber (cm-1) |
|---|---|---|---|---|
| ν (O-H) of water, stretching vibration | 3288.55±0.09 | 3288.36±1.98 | 3291.54±0.04 | 3291.68±0.10 |
| ν (C-H) of cis alkene groups, stretching vibration | 3010.05±0.39 | 3010.18±0.03 | 3009.98±0.17 | 3010.18±0.12 |
| νas (C-H) from methyl (-CH3) groups, asymmetrical stretch | 2955.54±0.04 | 2954.15±1.05 | - | - |
| νas (C-H) from methylene (CH2) groups, asymmetrical stretch | 2924.68±0.97 | 2923.48±0.00 | 2923.17±0.10 | 2923.21±0.26 |
| νs (C-H) from methylene (CH2) groups, symmetrical stretch | 2853.96±0.21 | 2853.48±0.00 | 2854.17±0.01 | 2854.07±0.17 |
| ν(C = O) of ester functional groups, stretching vibration | 1743.88±0.50 | 1743.40±0.02 | 1743.98±0.20 | 1744.05±0.26 |
| δas(CH2) from methylene (CH2) groups, bending | 1461.70±0.23 | 1458.78±0.08 | 1453.19±2.30 | 1454.81±0.00 |
| γ (CH2) of lipids | 1158.85±1.05 | 1158.81±0.18 | 1154.20±0.04 | 1154.16±0.00 |
| νs (C-O-C) of triglycerides | 1099.12±0.07 | 1098.49±0.27 | 1101.19±0.06 | 1101.08±0.03 |
The wavenumbers corresponding to the band assignments are presented as the mean ± standard deviation (SD).