Rapid determination of chemical composition and classification of bamboo fractions using visible–near infrared spectroscopy coupled with multivariate data analysis

Table 7 Results of calibration and prediction models for analysis of glucose and xylose content level

Wavelength (nm)	Sample sets	Level	Before aqueous ammonia pretreatment (n = 40)				After aqueous ammonia pretreatment (n = 90)
			Glucose		Xylose		Glucose		Xylose
			R ²	SEC/SEV	R ²	SEC/SEV	R ²	SEC/SEV	R ²	SEC/SEV
400–780	Calibration	High	0.998	0.01	0.996	0.03	0.821	0.21	0.941	0.12
	Calibration	Low	0.998	0.01	0.996	0.03	0.821	0.21	0.941	0.12
	Validation	High	0.743	0.26	0.808	0.23	0.814	0.22	0.869	0.17
	Validation	Low	0.743	0.26	0.808	0.23	0.814	0.22	0.869	0.17
	Factors	High	11		9		1		8
	Factors	Low	11		9		1		8
780–2500	Calibration	High	0.955	0.11	0.978	0.08	0.810	0.22	0.850	0.19
	Calibration	Low	0.955	0.11	0.978	0.08	0.810	0.22	0.850	0.19
	Validation	High	0.491	0.38	0.857	0.20	0.783	0.24	0.783	0.22
	Validation	Low	0.491	0.38	0.857	0.20	0.783	0.24	0.783	0.22
	Factors	High	7		7		3		6
	Factors	Low	7		7		3		6
400–2500	Calibration	High	0.939	0.13	0.984	0.07	0.994	0.04	0.978	0.07
	Calibration	Low	0.939	0.13	0.984	0.07	0.994	0.04	0.978	0.07
	Validation	High	0.748	0.26	0.891	0.17	0.953	0.11	0.924	0.13
	Validation	Low	0.750	0.26	0.891	0.17	0.953	0.11	0.924	0.13
	Factors	High	7		8		12		11
	Factors	Low	7		8		12		11

The data of glucose and xylose content level and spectra were collected from 4- and 6-meter-height juvenile bamboo before aqueous ammonia pretreatment, and 2- and 10-year-old mature bamboo and 4- and 6-meter-height juvenile bamboo after aqueous ammonia pretreatment

ISSN: 2731-3654