Rapid Quantitative Analysis of Forest Biomass Using Fourier Transform Infrared Spectroscopy and Partial Least Squares Regression

Table 1

Performance evaluation of PLS models developed using 1st-derivative treated spectra of the full (i) and fingerprint (ii) regions for predicting chemical composition.

Constituent (%)	Extractives	Lignin	Cellulose	Hemicelluloses	Glucose	Arabinose	Galactose	Mannose	Xylose	Holocellulose
LVs
(i)	2	2	2	3	2	2	3	3	2	2
(ii)	2	2	2	3	2	2	3	3	2	2
SEC
(i)	0.93	1.58	3.89	1.32	3.71	0.36	1.09	0.85	0.74	3.92
(ii)	1.03	1.77	4.04	1.61	3.88	0.4	1.03	0.82	0.76	4.25
SECV
(i)	1.4	2.02	5.1	3.58	4.6	0.46	1.87	1.87	1.13	5.05
(ii)	1.18	2.04	4.58	3.46	4.4	0.46	2.05	1.84	1.06	4.79
(i)	0.93	0.86	0.74	0.82	0.77	0.77	0.64	0.71	0.7	0.73
(ii)	0.91	0.83	0.72	0.74	0.75	0.72	0.67	0.73	0.68	0.68
RPD
(i)	2.34	2.06	1.46	0.85	1.63	1.57	0.93	0.81	1.16	1.45
(ii)	2.83	2.04	1.61	0.87	1.7	1.6	0.85	0.84	1.24	1.53