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

Table 8 Prediction results of unknown samples of glucose and xylose content level

Wavelength (nm)	Sugars	Level	Before aqueous ammonia pretreatment (n = 40)			After aqueous ammonia pretreatment (n = 90)
Wavelength (nm)	Sugars	Level	No. of prediction samples	Correct no.	Accuracy (%)	No. of prediction samples	Correct no.	Accuracy (%)
400–780	Glucose	High	10	10	100	18	18	100
	Glucose	Low	6	6	100	18	18	100
	Xylose	High	8	8	100	24	24	100
	Xylose	Low	8	8	100	12	12	100
780–2500	Glucose	High	10	10	100	18	18	100
	Glucose	Low	6	6	100	18	18	100
	Xylose	High	8	8	100	24	24	100
	Xylose	Low	8	8	100	12	12	100
400–2500	Glucose	High	10	10	100	18	18	100
	Glucose	Low	6	6	100	18	18	100
	Xylose	High	8	8	100	24	24	100
	Xylose	Low	8	8	100	12	12	100

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 (based on PLS-DA)

ISSN: 2731-3654