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FTIR peaks (cm−1) of standard β-carotene and extracted pigment
| Extracted pigment | Standard β-carotene | Intensity | Functional group | Mode |
|---|---|---|---|---|
| 2922.9 | 2972.4 | m-s | –CH3,–CH2 | C–H Stretching |
| 2853.8 | 2874.9 | m-s | –CH3,–CH | C–H Stretching |
| 1744.2 | 1717.4 | vs | –C=O | C=O Stretching |
| 1654.9 | 1717.4 | vs | –C=O | C=O Stretching |
| 1462.5 | 1447.6 | m | –CH2,–CH3 | Deformation |
| 1375.9 | 1362.4 | m | CH3 | Deformation |
| 1160.5 | 1174.6 | s | C–O | Stretching |
| 1111.6 | 1070.6 | m | C–C–C | Bending |
| 722.6 | 967.4 | w | –CH2 | Rocking |
