Table 6.

Parameters and prediction difference of models for the amoxicillin capsule constructed using a spectral library.

Parameter	Amoxicillin Model		Water Model
	Training set	Test set	Training set	Test set
Number of samples	38	13	42	11
Content range (%, mg/mg)	7.97–84.40	8.05–84.31	1.42–12.80	1.89–12.60
Wavenumber range (cm−1)	7702.5–7124, 6549.3–5970.7, 4825.2–4246.6		9955.1–8848.1, 7752.7–7197.3
Preprocessing method	1st derivative + vector normalization		1st derivative + vector normalization
Rank	5		5
R2 (%)	99.91		99.38
RMSEP (%)	0.854		0.256
Samples whose prediction difference is >5%	0% (0/211)		0% (0/211)
Samples whose prediction difference is <1%	41.2% (87/211)		65.4% (138/211)
Average prediction difference	0.8%		0.4%