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Table 5 Summary statistics for calibration models for carbohydrate release and yield following pretreatment and enzymatic hydrolysis

From: Rapid analysis of composition and reactivity in cellulosic biomass feedstocks with near-infrared spectroscopy

Constituent Samples Factors RMSEC RMSECV R 2 Slope Intercept
GX.Release 166 9 0.03 0.03 0.78 0.80 0.07
G.Release 167 11 0.02 0.03 0.80 0.81 0.05
X.Release 167 11 0.01 0.01 0.82 0.84 0.02
GX.Yield 164 8 0.05 0.06 0.84 0.85 0.10
G.Yield 165 8 0.06 0.07 0.84 0.85 0.10
X.Yield 165 8 0.05 0.05 0.70 0.73 0.18
  1. GX.Release and GX.Yield are separate PLS-1 models. G.Release and X.Release, and G.Yield and X.Yield are combined PLS-2 calibration models. “Factors:” optimal number of factors for the model. RMSECV values are slightly higher than the uncertainties of the primary analytical methods. The slope and intercept describe the line of best fit for cross-validation.
  2. RMSEC root-mean-square-error of the calibration model, RMSECV root-mean-square-error of cross-validated model, R 2 square of the correlation coefficient of the cross-validated model.