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Table V
Powder samples – PLS results of the calibration and cross-validation on detrend, SNV (standard normal variate) and derivate 2 preprocessing spectral data. N: number of sample. M: mean. SD: standard deviation. SEC: standard error of calibration. SECV: standard error of cross validation.
| Properties | N | Outliers | M | SD | Rank | SEC | SECV | r 2 |
|---|---|---|---|---|---|---|---|---|
| Radial shrinkage | 79 | 2 | 3.16 | 0.66 | 3 | 0.35 | 0.42 | 0.71 |
| Tangential shrinkage | 79 | 2 | 5.47 | 1.27 | 2 | 0.61 | 0.73 | 0.77 |
| Fibre saturation point | 79 | 3 | 20.35 | 1.67 | 3 | 0.62 | 0.78 | 0.87 |