Table 4.
Performance parameters of the established SiPLS models of the total flavones and l-borneol using different spectral pretreatment methods.
| Compounds | Pretreatment | Interval Number | Latent Factors | RMSEC | R2 | RMSECV | R2 |
|---|---|---|---|---|---|---|---|
| Total flavones | Raw | 7, 12, 16 | 9 | 0.9524 | 0.9476 | 1.1736 | 0.9226 |
| SG(9) | 7, 12, 16 | 9 | 0.9826 | 0.9442 | 1.1836 | 0.9213 | |
| 1D + SG(9) | 1, 14, 17 | 7 | 1.0445 | 0.9370 | 1.3463 | 0.8982 | |
| 2D + SG(9) | 3, 7, 15 | 7 | 0.5648 | 0.9816 | 1.3541 | 0.8970 | |
| MSC | 10, 17, 20 | 6 | 1.4587 | 0.8771 | 1.7493 | 0.8281 | |
| SNV | 8, 12, 16 | 5 | 1.3421 | 0.8960 | 1.5071 | 0.8724 | |
| l-borneol | Raw | 6, 7, 9 | 13 | 0.0505 | 0.9602 | 0.0822 | 0.8975 |
| SG(9) | 6, 7, 9 | 13 | 0.0612 | 0.9416 | 0.0832 | 0.8948 | |
| 1D + SG(9) | 6, 7, 10 | 10 | 0.0559 | 0.9511 | 0.0842 | 0.8924 | |
| 2D + SG(9) | 3, 6, 7 | 6 | 0.0481 | 0.9638 | 0.0812 | 0.8998 | |
| MSC | 6, 7, 9 | 9 | 0.0876 | 0.8803 | 0.1080 | 0.8228 | |
| SNV | 6, 9, 10 | 12 | 0.0442 | 0.9696 | 0.0909 | 0.8744 |