Real-Time Release Testing of Herbal Extract Powder by Near-Infrared Spectroscopy considering the Uncertainty around Specification Limits

Table 3

The validation results for NIR determination of cryptotanshinone.

Theoretical concentration (%)	Mean calculated content (%)	Trueness		Precision
		Relative bias (%)	Recovery (%)	Repeatability (%)	Intermediate precision (%)
0.20	0.40	100.00	200.00	73.58	92.85
0.31	0.46	46.88	146.88	46.34	52.73
0.50	0.69	38.93	138.93	29.16	35.68
1.18	0.86	−26.89	73.11	26.98	26.98
2.05	2.06	0.33	100.33	7.67	7.97
2.26	2.48	9.72	109.72	9.24	9.97
5.29	4.92	−6.99	93.01	3.48	4.28
9.68	9.51	−1.72	98.28	2.99	3.06