Table 1: Results for M1 model without and with SG derivative spectral pre-treatment for 25 calibration points and 9 external validation points.

   Derivative order    -    1    2
   Polynomial order    -    2    3    2 or 3
   Segment size    -    11    21    11    21    11    21
   LV    4    6    3    6    3    6    4
   RMSEC (%)    2.83    1.97    3.58    2.42    3.46    3.02    3.45
   RMSECV (%)    5.39    4.88    4.57    5.14    5.75    7.91    6.41
   RMSEP (%)    4.59    5.80    6.76    9.99    7.95    12.89    11.03

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