Table 2.

Calibration curves, LOD, LOQ, intraday, and interday for polyphyllin I and polyphyllin II.

Analytes	Regression equation	r 2	LOD (μg/mL)	LOQ (μg/mL)	Interday (RSD, %)						Intraday (RSD, %)		Stability (RSD, %)
					Day 1		Day 2		Day 3
					t	p	t	p	t	p	t	p
Polyphyllin I	Y = 333.885X − 6750.93	0.9990	10.95	32.08	0.15	2.72	0.07	1.36	0.06	2.01	0.12	2.48	3.46
Polyphyllin II	Y = 271.889X − 5243.32	0.9997	14.67	44.44	0.16	2.88	0.06	2.98	0.05	2.11	0.12	2.81	2.78