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

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

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
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
Low 0.743 0.26 0.808 0.23 0.814 0.22 0.869 0.17
Factors High 11 9 1 8
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
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
Low 0.491 0.38 0.857 0.20 0.783 0.24 0.783 0.22
Factors High 7 7 3 6
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
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
Low 0.750 0.26 0.891 0.17 0.953 0.11 0.924 0.13
Factors High 7 8 12 11
Low 7 8 12 11
  1. 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