Research Article
Effects of Methane Fermentation on Spectral Properties of Fulvic Acid Extracted from Peat through Liquid Acid Precipitation
Table 2
Infrared peak position comparison.
| | Peak position | Functional group | Absorption type |
| | 3700∼3200 cm−1 | Hydroxyl (-OH) | Stretching vibration | | 2960 ± 10 cm−1 | Methyl (-CH3) | Antisymmetric stretching vibration | | 2925 ± 5 cm−1 | Methylene (-CH2-) | Antisymmetric stretching vibration | | 2400∼2300 cm−1 | Instrument background peak | — | | 1900∼1630 cm−1 | Carbonyl (-C=O) | Stretching vibration | | 1620∼1450 cm−1 | On benzene ring C=C | Stretching vibration | | 1300∼1000 cm−1 | Alcohol, phenol, ether (C-O) | Stretching vibration |
|
|
