Quantitative Analysis of Berberidis Cortex via Quantitative Analysis of Multicomponents by Single Marker (QAMS) Combined with Fingerprint and Chemometrics Methods

Table 2

Calibration curves of four alkaloids of the reference substance.

Analytes	Regression equation	R	LOD (mg/mL)	LOQ (mg/mL)	Linear range (mg/mL)
Magnoflorine	y = 15369x + 153559	0.9999	0.0113	0.0377	0.0780∼1.550
Jatrorrhizine hydrochloride	y = 38648x + 192212	0.9999	0.0056	0.0185	0.0440∼0.8700
Palmatine hydrochloride	y = 37947x + 146764	0.9999	0.0055	0.0182	0.0380∼0.7600
Berberine hydrochloride	y = 39003x + 87162	1.000	0.0044	0.0145	0.0500∼1.000