Table 1.
Peak (cm−1) | Intensity | Characterization | Functional group |
---|---|---|---|
3423 | S | -O-H stretching vibration | O-H |
2933 | W | -C-H stretching vibration | -CH2- |
1628 | S | -C=O stretching vibration | -COOH |
1410 | M | -C-O stretching vibration | -COOH |
1074 | S | -C-O-C and C-O-H overlaping vibrations | / |