Table 1.
FTIR-ATR band identification and characterization of the red seaweed Calliblepharis jubata polysaccharides (carrageenan), based on the literature [53,54].
| Wave Number (cm−1) | Chemical Group | Letter Code |
|---|---|---|
| 805 | C–O–SO3 on C2 of 3,6-anhydrogalactose | DA2S |
| 845 | d-galactose-4-sulfate | G4S |
| 905 | C–O–SO3 on C2 of 3,6-anhydrogalactose | DA2S |
| 930 | C–O of 3,6-anhydrogalactose (agar/carrageenan) | (DA) |
| 970–975 | Galactose | G/D |
| 1025 | Sulfate esters | S=O |
| 1070 | C–O of 3,6-anhydrogalactose | DA |
| 1240–1260 | Sulfate esters | S=O |