An Approach to Rapid Determination of Tween-80 for the Quality Control of Traditional Chinese Medicine Injection by Partial Least Squares Regression in Near-Infrared Spectral Modeling

Table 1

Comparison of different calibration models of Tween-80 content developed with different spectral preprocessing methods.

No.	Pretreatment methods	LVs	Calibration		Cross validation
			R	SEC	R	SECV^c
B	SG smoothing	5	0.9986	0.0526	0.9984	0.0561
C	One DC	5	0.9985	0.0523	0.9980	0.0635
D	Two DC	5	0.9985	0.0523	0.9984	0.0561
E	MSC	5	0.9983	0.0571	0.9981	0.0615
F	SNV	5	0.9980	0.0614	0.9978	0.0660
G	Normalization	5	0.9985	0.0523	0.9984	0.0561
H	One DC + MSC	4	0.9964	0.0834	0.9958	0.8840
I	Two DC + MSC	4	0.9964	0.834	0.9981	0.8840

LV: latent variable number; SEC: standard error of calibration; SECV: standard error of cross validation; DC: dimension convolution; MSC: multiple scatter correction; SNV: standard normal variate.