Table 2.

Linear regression, LOD, LOQ and precision of 40 standard compounds and stability and recovery of the analytes in a sample solution.

No. b	Regression Equation c	r2	Linear Range (µg/mL)	LOD (µg/mL)	LOQ (µg/mL)	Precision (RSD, %)		Stability (RSD, %)	Recovery (n = 6)
						Intraday (n = 6)	Interday (n = 18)		Mean, %	RSD, %
1	y = 392.6x − 49.916	0.9954	0.524–26.2	0.0586	0.1953	2.97	3.99	3.98	102.5	3.19
2	y = 630x + 57.152	0.9948	0.616–30.8	0.0177	0.0588	2.77	4.93	4.85	99.9	1.29
3	y = 180160x + 97682	0.9970	0.425–21.3	0.0001	0.0004	2.16	4.14	4.02	102.6	4.81
4	y = 11809x + 4671.1	0.9952	0.452–22.6	0.0018	0.0061	2.41	4.08	4.76	103.8	3.08
5	y = 363.6x + 120.5	0.9995	0.472–23.6	0.0611	0.2036	2.97	4.8	4.19	104.6	1.32
6	y = 3139.2x + 2525	0.9963	0.472–23.6	0.0068	0.0227	2.41	4.53	4.59	102.7	3.89
7	y = 141382x + 94037	0.9974	0.560–28.0	0.0002	0.0005	3.09	3.65	4.05	104.9	2.50
8	y = 3774.2x + 1124.3	0.9998	0.508–25.4	0.0059	0.0197	2.57	4.62	4.27	103.1	4.08
9	y = 4960.3x + 4375.9	0.9965	0.572–28.6	0.0045	0.0149	2.23	4.49	4.24	104.2	2.35
10	y = 5863.7x + 298.23	0.9999	0.540–27.0	0.0038	0.0128	3.15	3.87	3.81	104.4	3.95
11	y = 891.7x + 849.87	0.9991	0.480–24.0	0.0245	0.0817	3.09	4.09	4.17	103.5	3.74
12	y = 905.2x + 781.29	0.9991	0.476–23.8	0.0242	0.0807	3.92	4.2	4.44	97.8	1.20
13	y = 187.1x + 11.88	0.9933	0.472–23.6	0.1181	0.3933	3.45	4.12	4.81	96.4	4.59
14	y = 961.0x − 72.951	0.9948	0.496–24.8	0.0243	0.0809	2.34	4.17	4.28	95.2	2.78
15	y = 210.9x − 44.971	0.9980	0.480–24.0	0.1088	0.3623	2.89	3.09	3.24	102	3.11
16	y = 338x − 21.961	0.9968	0.447–22.4	0.0668	0.2224	3.02	3.45	3.66	98.6	2.82
17	y = 618x − 5.3866	0.9996	0.424–21.2	0.0364	0.1213	3.22	3.4	3.27	105.7	1.62
18	y = 735x − 23.523	0.9967	0.480–24.0	0.0315	0.1048	3.16	3.78	4.03	104.5	3.80
19	y = 3232.4x + 849.76	0.9992	0.584–29.2	0.0068	0.0227	3.23	4.85	4.33	97.7	3.16
20	y = 11236x − 5692	0.9967	0.588–29.4	0.0020	0.0067	2.18	4.34	4.68	99.8	1.01
21	y = 2574.4x + 2231.2	0.9994	0.620–31.0	0.0086	0.0285	3.2	3.75	3.61	97.5	4.05
22	y = 5387.7x − 845.81	0.9957	0.504–25.2	0.0041	0.0138	2.09	3.63	3.73	101.1	3.41
23	y = 135.8x + 173.86	0.9958	0.628–31.4	0.1607	0.5352	2.62	3.58	3.18	95.5	4.88
24	y = 402.8x + 122.7	0.9989	0.488–24.4	0.0559	0.186	2.31	3.87	3.94	98.9	2.49
25	y = 548.0x − 5.2532	0.9970	0.504–25.2	0.0419	0.1394	3.48	4.24	4.26	98.2	3.08
26	y = 283.7x + 154.16	0.9994	0.744–37.2	0.0789	0.2627	2.34	3.76	3.45	97.2	3.31
27	y = 860x − 3.1856	0.9992	0.700–35.0	0.0263	0.0875	2.76	3.65	3.45	100.5	2.62
28	y = 1042x + 83.479	0.9980	0.752–37.6	0.0212	0.0705	2.64	4.13	2.16	100.0	1.17
29	y =518x + 31.816	0.9980	0.588–29.4	0.04308	0.1435	2.81	4.42	4.38	99.3	4.94
30	y = 136x + 100.17	0.9999	0.708–35.4	0.1625	0.5412	3.23	4.87	4.91	103.2	1.69
31	y = 861x + 98.616	0.9962	0.524–26.2	0.0253	0.0843	2.59	3.9	3.55	98	3.40
32	y = 539x − 15.987	0.9973	0.628–31.4	0.0416	0.1385	2.59	3.33	3.75	97.5	2.71
33	y = 295.7x + 241.23	0.9972	0.592–29.6	0.0749	0.2494	2.38	3.63	3.52	102.5	2.08
34	y = 550.3x + 519.33	0.9901	0.640–32.0	0.0412	0.1373	2.66	4.79	4.40	105.4	2.92
35	y = 780x + 24.97	0.9984	0.816–40.8	0.0272	0.0905	2.75	4.78	4.18	97.4	2.88
36	y = 940x − 21.517	0.9999	0.704–35.2	0.0178	0.0592	2.9	4.39	4.83	96.2	3.80
37	y = 368x − 19.204	0.9985	0.596–29.8	0.0624	0.2079	2.79	4.71	4.73	97.7	3.56
38	y = 465x + 432.16	0.9979	0.560–28.0	0.0465	0.1548	2.94	3.89	3.96	98.5	4.06
39	y = 266.5x + 5.1122	1.000	0.720–36.0	0.0845	0.2813	2.15	3.12	3.27	96.5	3.13
40	y = 162x − 17.799	0.9999	0.492–24.6	0.1457	0.4852	2.99	3.24	3.41	105.0	4.00

^a The sample was prepared from No. 1; ^b The 40 analytes was the same as in Table 1; ^c x is the concentration of each compound in µg/mL; y is the peak area of the respective compound.