Table 2.

Curves, test range, limit of detection (LOD), limit of quantification (LOQ), precision, and repeatability for the seventeen analytes.

No.	Compounds	Calibration Curves	r 2	Linear Range (ng/mL)	LOQ (ng/mL)	LOD (ng/mL)	Precision (RSD, %)		Repeatability
							Intra-Day	Inter-Day	(RSD, %, n = 6)
1	3′-Hydroxydaidein	Y = 0.934X − 0.0436	0.9991	5.40–1350	5.400	1.600	2.43	3.23	3.45
2	Butein	Y = 0.1675X − 0.198	0.9993	1.41–2820	1.410	0.470	2.49	4.85	4.53
3	Daidzein	Y = 0.9697X − 0.061	0.9989	3.02–1510	3.020	1.000	1.74	3.01	2.98
4	Liquiritigenin	Y = 0.1813X + 0.0075	0.9999	1.61–3220	1.610	0.500	1.25	2.26	3.18
5	Eriodictyol	Y = 0.1802X − 0.0166	0.9997	1.36–1360	1.360	0.453	2.38	2.45	2.06
6	Butin	Y = 0.1163X − 0.0568	0.9986	1.51–3020	1.510	0.458	1.85	3.54	2.77
7	Naringenin	Y = 0.2291X − 0.0722	0.9989	2.72–1360	2.720	0.906	2.07	4.61	4.06
8	Genistein	Y = 0.8139X − 0.2152	0.9988	3.82–1910	3.820	1.528	0.76	3.33	2.54
9	Tectorigenin	Y = 0.203X − 0.2161	0.9987	2.44–1220	2.440	0.813	1.96	2.40	1.95
10	Alpinetin	Y = 0.5127X − 0.0544	0.9996	5.36–1340	5.360	1.790	2.85	4.94	4.76
11	Isoliquiritigenin	Y = 0.1308X + 0.0284	0.9996	1.416–1770	1.416	0.480	0.45	3.02	3.67
12	Formononetin	Y = 0.0516X − 0.0608	0.9993	0.516–1290	0.516	0.172	1.78	1.90	3.32
13	Dalbergin	Y = 0.2867X − 0.0665	0.9991	0.256–1280	0.256	0.085	3.51	4.85	4.61
14	3′-O-methylviolanone	Y = 0.6244X + 0.0119	0.9989	9.90–2970	9.900	3.300	2.08	4.49	2.87
15	Sativanone	Y = 0.675X − 0.1047	0.9991	18.84–5652	18.840	6.080	1.24	1.26	4.73
16	Pinocembrin	Y = 0.3485X − 0.0569	0.9992	2.66–1330	2.660	0.870	1.04	1.94	3.82
17	Prunetin	Y = 0.0489X − 0.0657	0.9989	1.12–2240	1.120	0.374	1.91	3.34	3.61