Characterization and Quantification of Luteolin-Metal Complexes in Aqueous Extract of Lonicerae Japonicae Flos and Huangshan Wild Chrysanthemum

Table 2

Retention time and peak area of L. japonica decoction (, n = 3).

No.	20% formic acid-methanol sample		Methanol sample		Increase in peak area (%)
	Retention time	Peak area	Retention time	Peak area
1	33.806	18562.99 ± 1078.91	33.898	8072.82 ± 487.77	129.94
2	34.925	55410.47 ± 3220.53	35.055	16619.99 ± 1004.20	233.40
3	38.134	8282.763 ± 481.41	38.186	2587.756 ± 156.35	220.08
4	42.941	37570.57 ± 2183.65	42.982	13548.2 ± 818.59	177.31
5	54.314	486.37 ± 28.27	54.257	88.5658 ± 5.35	449.17
6	55.249	91.60 ± 5.32	Not detected	Not detected	—
7	56.273	73.73 ± 4.29	Not detected	Not detected	—
8	57.655	141.49 ± 8.22	57.637	33.18 ± 2.00	326.48
9	58.699	195.47 ± 11.36	58.725	43.25 ± 2.61	351.95
10	60.251 (luteolin)	484.24 ± 28.14	60.258 (luteolin)	205.54 ± 12.42	135.60