Application of NIR Spectral Standardization Based on Principal Component Score Evaluation in Wheat Flour Crude Protein Model Sharing

Table 3

Evaluation of the PLS calibration model for sample protein under different pretreatment methods.

Pretreatment method	Number of principal components	Calibration set		Prediction set		RPD
		Rc	RMSEC	Rp	RMSEP
None	7	0.96	0.50	0.93	0.61	3.38
SNV	8	0.97	0.48	0.94	0.51	4.09
Normalization	6	0.97	0.49	0.93	0.57	3.97
MSC	9	0.97	0.48	0.93	0.57	3.97
Normalization + MSC	7	0.97	0.46	0.96	0.43	4.22
1^st derivative	5	0.96	0.54	0.94	0.54	3.59