| Calibration | Cross validation | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
N | Terms | DT | SCM | Spectrum range (nm) | Mean | SD | SEC | R 2 | SECV | R 2 cv | RPD | |
Cellulose | 140 | 3 | 2,4,4,2 | SNVD | 408–2492 | 25.11 | 4.45 | 1.55 | 0.88 | 1.59 | 0.87 | 2.79 |
Hemicellulose | ||||||||||||
 Ara (%) | 145 | 5 | 1,4,4,1 | SNV | 408–2492 | 13.22 | 1.37 | 0.75 | 0.70 | 0.79 | 0.66 | 1.73 |
 Xyl (%) | 139 | 9 | 1,4,4,1 | SNV | 1108–2492 | 75.08 | 2.63 | 1.07 | 0.84 | 1.20 | 0.79 | 2.18 |
 X/A | 142 | 5 | 1,4,4,1 | SNV | 408–2492 | 5.75 | 0.77 | 0.37 | 0.77 | 0.39 | 0.75 | 1.98 |
Lignin | ||||||||||||
 ASL | 141 | 9 | 1,4,4,1 | MSC | 1108–2492 | 3.13 | 0.41 | 0.12 | 0.91 | 0.15 | 0.87 | 2.78 |
 AIL | 140 | 5 | 1,4,4,1 | SNV | 408–2492 | 8.20 | 1.40 | 0.71 | 0.74 | 0.76 | 0.70 | 1.82 |
 Total | 140 | 9 | 0,0,1,1 | WMSC | 408–2492 | 11.33 | 1.55 | 0.69 | 0.80 | 0.75 | 0.77 | 2.07 |