|
Pretreatment
|
Chemical composition
|
Factors
|
R2
c
|
RMSEC
|
R2
p
|
RMSEP
|
SD
|
RPD
|
RER
|
|---|
|
MSC
|
Cellulose
|
10
|
0.958
|
2.1
|
0.925
|
2.8
|
10.0
|
3.6
|
11.8
|
|
Xylan
|
3
|
0.947
|
1.9
|
0.931
|
2.2
|
8.1
|
3.7
|
12.2
|
|
Lignin
|
8
|
0.972
|
1.5
|
0.939
|
2.2
|
8.8
|
4.1
|
13.3
|
|
Glucose
|
16
|
0.998
|
0.7
|
0.986
|
2.2
|
18.2
|
8.4
|
26.4
|
|
Xylose
|
14
|
0.998
|
1.3
|
0.974
|
3.8
|
23.7
|
6.3
|
17.5
|
|
EMSC
|
Cellulose
|
10
|
0.964
|
1.9
|
0.935
|
2.6
|
10.1
|
3.9
|
12.5
|
|
Xylan
|
3
|
0.953
|
1.8
|
0.937
|
2.1
|
8.2
|
3.9
|
13.0
|
|
Lignin
|
7
|
0.964
|
1.7
|
0.943
|
2.1
|
8.7
|
4.2
|
13.3
|
|
Glucose
|
16
|
0.998
|
0.4
|
0.992
|
1.6
|
18.2
|
11.2
|
37.7
|
|
Xylose
|
14
|
0.998
|
1.1
|
0.980
|
3.3
|
23.7
|
7.3
|
20.5
|
|
SNV
|
Cellulose
|
5
|
0.910
|
3.0
|
0.874
|
3.6
|
9.8
|
2.7
|
7.9
|
|
Xylan
|
4
|
0.955
|
1.8
|
0.935
|
2.1
|
8.2
|
3.9
|
13.3
|
|
Lignin
|
8
|
0.974
|
1.4
|
0.949
|
2.0
|
8.8
|
4.3
|
13.8
|
|
Glucose
|
15
|
0.996
|
1.1
|
0.974
|
2.9
|
18.2
|
6.3
|
21.0
|
|
Xylose
|
15
|
0.998
|
1.0
|
0.980
|
3.3
|
23.7
|
7.2
|
20.0
|
|
First derivative
|
Cellulose
|
8
|
0.994
|
0.8
|
0.990
|
1.0
|
10.2
|
10.1
|
35.2
|
|
Xylan
|
7
|
0.990
|
0.8
|
0.982
|
1.1
|
8.3
|
7.7
|
25.2
|
|
Lignin
|
7
|
0.988
|
1.0
|
0.980
|
1.2
|
8.8
|
7.2
|
22.7
|
|
Glucose
|
9
|
0.998
|
0.6
|
0.996
|
1.1
|
18.2
|
16.1
|
52.6
|
|
Xylose
|
7
|
0.998
|
1.1
|
0.994
|
1.8
|
23.7
|
13.0
|
34.3
|
|
Second derivative
|
Cellulose
|
7
|
0.988
|
1.1
|
0.976
|
1.5
|
10.2
|
6.6
|
20.3
|
|
Xylan
|
7
|
0.990
|
0.8
|
0.984
|
1.0
|
8.3
|
8.1
|
29.0
|
|
Lignin
|
10
|
0.996
|
0.5
|
0.994
|
0.7
|
8.9
|
13.7
|
36.6
|
|
Glucose
|
8
|
0.998
|
0.7
|
0.996
|
1.1
|
18.2
|
16.8
|
51.8
|
|
Xylose
|
7
|
0.996
|
1.4
|
0.992
|
2.0
|
23.7
|
11.7
|
32.5
|
-
R
2
c square of the correlation coefficient for calibration, RMSEC root mean square error of calibration, R
2
p square of the correlation coefficient for prediction, RMSEP root mean square error of prediction, SD standard deviation, RPD ratio of root mean square error of prediction to standard deviation, RER range error ratio. MSC multiplicative scattering correction, EMSC extensive multiplicative scattering correction, SNV standard normalized variate. The number of samples used for quantitative analysis of cellulose, xylan, and lignin is 36. The number of samples used for quantitative analysis of glucose and xylose is 26
