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Table 3 Summary statistics for external validation of the PLS-2 calibration model for composition

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

Constituent Samples Factors RMSEP R 2 Slope Intercept
Glucan 25 9 1.8 0.95 0.92 3.1
Xylan 25 9 1.0 0.90 0.97 0.6
Lignin 25 9 1.5 0.91 0.86 2.0
Ash 25 9 1.3 0.89 0.90 0.3
  1. The RMSEP values are slightly higher than the uncertainty of the primary analytical methods. The slope and intercept describe the line of best fit for these samples.
  2. RMSEP root-mean-square-error of prediction, R 2 square of the correlation coefficient for the external validation predictions.