Tentative Raman bands assignment (cm–1)
| Sodium alginate | κ-carrageenan | Assignment |
|---|---|---|
| 1,620/1,417 | ν(COO–) | |
| 1,306/1,344 | δ(CH) | |
| 1,258 | (S=O) | |
| 1,100 | Glycoside ring respiration | |
| 959 | δ(C–C–H), δ(C–O–H) and ν(C–O–C) | |
| 810 | δ(C–O–H), ν(C–C), ν(C–O), δ(C–C–H) and δ(C–C–O) | |
| 1,090 | ν(C–O) | |
| 848 | (C–O–SO4) | |
| 430 | δ(C–C–C) and δ(C–O–C) |