Journal of Food Quality

Research Article

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

Table 1

Mass spectrometry information of the 18 flavonoids.


Compound name	Formula	Adduct/charge	Retention time (min)	Theoretical mass (m/z)	Experimental mass (m/z)	Mass error (×ppm)	Isotope ratio difference (%)

Quercitrin	C₂₁H₂₀O₁₁	[M + H]⁺	6.948	449.10784	449.10720	−1.4	4.4
Myricetin	C₁₅H₁₀O₈	[M + H]⁺	7.369	319.04484	319.04545	1.9	4.3
Isoliquiritigenin	C₁₅H₁₂O₄	[M + H]⁺	9.450	257.08084	257.08150	2.6	4.2
Silymarin	C₂₅H₂₂O₁₀	[M + H]⁺	8.374	483.12857	483.12780	−1.6	3.1
Isovitexin	C₂₁H₂₀O₁₀	[M + H]⁺	8.115	433.11292	433.11323	0.72	4.8
Vitexin	C₂₁H₂₀O₁₀	[M + H]⁺	7.804	433.11292	433.11303	0.25	3.7
Afzelin	C₂₁H₂₀O₁₀	[M + H]⁺	9.536	433.11292	433.11231	−1.4	3.5
Luteoloside	C₂₁H₂₀O₁₁	[M + H]⁺	6.526	449.10784	449.10827	1.0	3.5
Trilobatin	C₂₁H₂₄O₁₀	[M + H]⁺	7.545	437.14422	437.14350	−1.6	4.3
Schaftoside	C₂₆H₂₈O₁₄	[M + H]⁺	5.734	565.15518	565.15561	0.76	4.7
Rutinum	C₂₇H₃₀O₁₆	[M + H]⁺	6.325	611.16066	611.16165	1.6	4.0
Baimaside	C₂₇H₃₀O₁₇	[M + H]⁺	5.664	627.15558	627.15477	−1.3	3.2
Tiliroside	C₃₀H₂₆O₁₃	[M + H]⁺	8.175	595.14462	595.14458	−0.067	3.5
Camellianin A	C₃₃H₄₀O₂₀	[M + H]⁺	5.742	757.21857	757.21784	−1.0	3.3
Kaempferol	C₁₅H₁₀O₆	[M − H]⁻	8.941	285.04046	285.04164	4.1	4.1
Luteolin	C₁₅H₁₀O₆	[M − H]⁻	8.299	285.04046	285.04177	4.6	4.0
Quercetin	C₁₅H₁₀O₇	[M − H]⁻	8.216	301.03538	301.03649	3.7	4.1
Plantagoside	C₂₁H₂₂O₁₂	[M − H]⁻	6.153	465.10385	465.10391	0.13	2.9