| Literature values [27] | Lota-carrageenan (unhydrolyzed) | Carrageenan oligosaccharide (F1) | Carrageenan oligosaccharide (F2) | |
| Ester sulfate | 1220 - 1260 cm−1 | 1254.31 cm−1 | 1231.70 cm−1 | 1232.29 cm−1 |
| 3,6-Anhydrogalactose | 928 - 933 cm−1 | 930.94 cm−1 | 927.99 cm−1 | 928.10 cm−1 |
| Galactose-4-sulfate | 840 - 850 cm−1 | 849.07 cm−1 | 847.82 cm−1 | - |
| 3,6-Anhydrogalactose-2-sulfate | 800 - 805 cm−1 | 804.33 cm−1 | 804.01 cm−1 | 802.77 cm−1 |