Rapid Analysis of 18 Flavonoids in Tea by Ultrahigh-Performance Liquid Chromatography Coupled with Quadrupole-Time of Flight Mass Spectrometry

Table 3

Linearity, LODs, and LOQs of the 18 flavonoids.

Compound name	Recovery (%)			RSD (%)
	1LOQ	2LOQ	10LOQ	1LOQ	2LOQ	10LOQ
Quercitrin	86.7	88.1	88.5	1.35	2.11	1.24
Myricetin	81.4	90.2	81.4	1.45	1.02	1.65
Isoliquiritigenin	91.6	102	94.5	3.74	2.36	2.90
Silymarin	101	86.2	95.5	1.79	4.14	1.11
Isovitexin	84.7	80.9	88.4	5.37	2.48	3.45
Vitexin	77.6	79.5	73.8	2.40	2.15	2.40
Afzelin	80.2	88.0	88.0	2.13	3.49	0.340
Luteoloside	90.1	87.4	86.2	5.10	2.25	1.31
Trilobatin	89.7	84.2	91.2	1.69	4.59	1.00
Schaftoside	87.8	88.2	84.4	5.49	2.34	2.55
Rutinum	102	107	89.8	0.983	2.69	0.712
Baimaside	93.6	85.4	87.7	0.852	4.43	1.37
Tiliroside	85.3	83.7	85.7	3.51	3.60	8.05
Camellianin A	81.4	84.5	87.0	3.31	5.55	0.943
Kaempferol	84.8	91.0	91.2	3.08	3.48	1.62
Luteolin	82.2	86.5	88.1	1.68	1.03	0.544
Quercetin	86.4	93.3	90.3	3.18	1.19	0.135
Plantagoside	83.5	87.8	83.1	1.78	1.45	1.96

1LOQ, 2LOQ, and 10LOQ represent the three different concentration levels: 1 × LOQ, 2 × LOQ, and 10 × LOQ.