TABLE 2.

The results of method validation in terms of linearity, sensitivity, precision, and recovery.

Name	Linear range (ng·mL−1)	Equation	R2	LOD (ng·mL−1)	LOQ (ng·mL−1)	Precision a (mean ± SD)	Recovery a (RSD, %)
Cryptotanshinone	0.01–100	y = 1E-05x −1.5897	0.9919	0.009	0.030	48.23 ± 2.58	5.35
Dihydrotanshinone	0.01–100	y = 2E-05x −2.1578	0.9916	0.003	0.010	53.72 ± 3.11	5.79
Tanshinone IIA	0.01–100	y = 2E-05x −1.0208	0.9968	0.017	0.057	49.14 ± 2.12	4.31
Tanshinone I	0.01–100	y = 5E-05x −1.2928	0.9962	0.010	0.033	49.80 ± 1.73	3.47
Salvianate A sodium	0.05–100	y = 0.0003x −8.3986	0.9947	0.135	0.450	52.45 ± 2.08	3.97
Salvianolic acid A	0.05–100	y = 9E-05x + 0.1683	0.9981	0.125	0.417	50.08 ± 1.02	2.04
Rosmarinic acid	0.05–100	y = 0.0002x −8.1191	0.9954	0.090	0.300	47.58 ± 1.99	4.18

^aSpiked level 50 ngmL⁻¹.