| Calibration | Cross validation | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
N | Terms | DT | SCM | Spectrum range (nm) | Mean | SD | SEC | R 2 | SECV | R 2 cv | RPD | |
Pretreatment (% total) | ||||||||||||
 Pentose | 140 | 8 | 2,5,5,2 | DET | 1108–2492 | 9.64 | 1.26 | 0.37 | 0.91 | 0.42 | 0.89 | 2.97 |
 Hexoses | 142 | 10 | 1,4,4,1 | SNV | 780–2492 | 19.34 | 7.95 | 1.16 | 0.98 | 1.35 | 0.97 | 5.89 |
 Total | 141 | 10 | 2,4,4,2 | SNVD | 780–2492 | 29.26 | 6.81 | 1.00 | 0.98 | 1.38 | 0.96 | 4.95 |
Enzymatic hydrolysis (% total) | ||||||||||||
 Pentose | 138 | 9 | 2,5,5,2 | None | 780–2492 | 23.90 | 4.01 | 0.69 | 0.97 | 0.83 | 0.96 | 4.80 |
 Hexoses | 143 | 10 | 2,10,10,2 | None | 780–2492 | 46.62 | 3.40 | 1.13 | 0.89 | 1.33 | 0.85 | 2.56 |
 Total | 141 | 10 | 2,4,4,2 | SNVD | 780–2492 | 70.74 | 6.81 | 1.00 | 0.98 | 1.38 | 0.96 | 4.95 |
Total sugar released (% dry matter) | ||||||||||||
 Pentose | 141 | 8 | 2,10,10,2 | DET | 1108–2492 | 15.21 | 1.59 | 0.48 | 0.91 | 0.54 | 0.88 | 2.93 |
 Hexoses | 139 | 9 | 2,10,10,2 | DET | 780–2492 | 30.38 | 4.88 | 1.08 | 0.95 | 1.24 | 0.94 | 3.95 |
 Total | 138 | 9 | 1,4,4,1 | WMSCn | 1108–2492 | 45.31 | 3.97 | 1.21 | 0.91 | 1.38 | 0.88 | 2.88 |
Fermentable hexoses (% total hexoses) | 144 | 9 | 2,8,8,2 | WMSC | 408–2492 | 71.17 | 10.11 | 1.78 | 0.97 | 2.20 | 0.95 | 4.60 |