Table 2.
Regression statistics results of latent variables, LVs; coefficient of determination for calibration and cross-validation (R2Cal and R2cv); the root mean square error for calibration and cross-validation (RMSEC and RMSECV), to quantify CN-NL/GA compound on chitosan substrate.
| Pretreatments | LVs | R2Cal | R2CV | RMSEC | RMSECV |
|---|---|---|---|---|---|
| non pretreatment | 3 | 0.721 | 0.278 | 1.335 | 2.435 |
| smoothing + normalize + mean centre | 3 | 0.973 | 0.743 | 0.418 | 1.485 |
| smoothing + SNV + mean centre | 3 | 0.977 | 0.624 | 0.384 | 4.820 |
| smoothing + baseline + mean centre | 3 | 0.983 | 0.857 | 0.333 | 0.993 |