From: Instrumental characterization of organic wastes for evaluation of vermicompost maturity
Wave number/cm−1 | Vibration | Functional group |
---|---|---|
3300-3500 | O–H stretch | Phenols and carboxylic groups |
3180-3090 | NH2 strech | Primary amides |
2925-2850 | C–H stretch | Aliphatic methylene groups of lipids and fats |
2590-2560 | S–H stretch | Thiol group |
1740-1720 | C=O | Aldehyde, ketone, carboxylic acids and esters |
1655-1640 | C=O C=C | Amide I, carboxylates Aromatic ring modes, alkenes |
1570-1550 | N–H deformation and C=N stretch | Amides II |
1515-1510 | Aromatic C=C stretch | Lignin |
1421-1410 | COO− stretch C–N stretch | Carboxylic acids Amide III |
1384 | N–O stretch | Nitrate band |
1320 | C–N stretch | Aromatic primary and secondary amines |
1000-1100 | C–O stretch Si–O stretch | Polysaccharides Clay minerals |
875 | C–O out of plane | Carbonate |
850-750 | NH2 out of plane | Primary amine group |
750-700 | N–H wag | Secondary amine group |
680-610 | S–O bends | Inorganic sulphates |