Pure extracts | Corrosion products | ||
Frequencies (cm−1) | Assignment | Frequencies (cm−1) | Assignment |
3339.60 | O-H | 3360.29 | O-H |
1635.49 | C=C | 1641.08 | C=C |
2110.25 | CºC | 1339.45 | C-H rock |
1275.68 | C-O-C | 551.87 | g-Fe2O3 |