| P. macrophylla | FTIR analysis | ||
| Absorption peak (cm−1) | Type of bond | Appearance | |
|
| 426.28 | Unidentified |
|
|
| 673.18 - 731.05 | C-H (Cis-disubstituted alkenes and monosubstituted benzene) | Strong |
|
| 835.21 - 1041.6 | C-H (trisubstituted alkenes; aliphatic amines) | Medium to strong; often overlapped |
|
| 1078.24 - 1163.11 | C-X (fluoroalkanes) | Two strong broad bands |
|
| 1240.27 - 1377.22 | C-O (aromatic ethers and carboxylic acids) N-O (aliphatic nitro compounds) | Weak |
|
| 1458.23 - 1535.39 | Aromatic C-C | About 3 to 4 |
|
| 1618.33 - 1664.62 | Conjugated C-C with benzene ring (dienes) | Strong |
|
| 1712.85 - 1735.99 | C=O (saturated carboxylic acids); esters and lactones |
|
|
| 2727.44 - 3392.9 | N-H (ammonium ions) | Multiple broad peaks |