Extraction, Enrichment, and Quantification of Main Antioxidant Aglycones of Flavonoids and Tannins from Melastoma Dodecandrum Lour.: Guided by UPLC-ESI-MS/MS

Table 2

The gradient program for simultaneous quantification of main flavonoids and phenolic acids in MD.

Time (min)	Solvent A (%)	Solvent B (%)	Solvent D (%)
0	5	2.5	92.5
6	18	2.5	79.5
12	21	2.5	76.5
12.5	23	2.5	74.5
18	23	2.5	74.5
19	39	2.5	58.5
23	39	2.5	58.5
24	47	2.5	50.5
30	41	2.5	56.5
31	50	2.5	47.5
40	50	2.5	47.5
45	97.5	2.5	0