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Table 6 Summary statistics for external validation of the PLS-1 and PLS-2 calibration models for carbohydrate release and yield

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

Constituent Samples Factors RMSEP R 2 Slope Intercept
GX.Release 18 9 0.04 0.94 0.81 0.06
G.Release 18 11 0.03 0.94 0.82 0.04
X.Release 18 11 0.02 0.88 0.71 0.04
GX.Yield 18 8 0.06 0.92 0.85 0.09
G.Yield 18 8 0.09 0.86 0.84 0.09
X.Yield 18 8 0.05 0.86 0.79 0.13
  1. External validation samples were predicted using the following calibration models: the PLS-1 GX.Release and GX.Yield calibration models, the PLS-2 G.Release and X.Release calibration model, and the PLS-2 G.Yield and X.Yield calibration model. “Factors:” the optimal number of factors for the model. The RMSEP values are higher than the uncertainty of the primary analytical methods.
  2. RMSEP root-mean-square-error of the prediction of the validation samples, R 2 square of the correlation coefficient of the predicted samples.