Table 3.
Cross-validation results for total sugar content (% dry matter, SNV: standard normal variate, Der1: Savitzky–Golay derivative 1, Der2: Savitzky–Golay derivative 2, NORM: normalization, RMSECV: Root Mean Square of Standard Error in Cross-Validation).
| Device | Pretreatment | Latent variables | RMSECV | R2cv |
|---|---|---|---|---|
| DLP NIRscan Nano EVM | SNVDer2 | 3 | 6.2 | 0.864 |
| F750 | NORM | 4 | 8.9 | 0.720 |
| LabSpec 4 | SNV | 8 | 2.6 | 0.976 |
| MicroNIR1700 | SNVDer1 | 5 | 3.8 | 0.949 |
| MicroNIR2200 | SNVDer1 | 8 | 2.8 | 0.972 |
| NIRONE 2.2 | SNVDer2 | 7 | 7.7 | 0.791 |
| Scio | SNVDer2 | 4 | 9.4 | 0.687 |
| TellSpec | Der1 | 5 | 9.3 | 0.692 |