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

Table 1

Physicochemical properties and the static adsorption and desorption parameters of antioxidants on fourteen resins.

Resins	Polarity	Structure	Particle size (mm)	Specific surface area (m^2/g)	Pore diameter (nm)	Moisture contents (%)	Adsorption capacity (μmol TE/g)	Desorption ratio (%)
AB-8	Weak-polar	Polystyrene	0.3–1.25	480–520	12–16	41.27	1552.41 ± 89.5	89.55 ± 4.82
ADS-17	Middle-polar	Acrylic acid	0.3–1.25	90–125	25–30	46.55	1989.47 ± 117.46	77.12 ± 4.59
D101	Nonpolar	Polystyrene	0.3–1.2	650–700	8.5–9	41.86	1718.29 ± 139.84	82.72 ± 4.02
HPD100	Nonpolar	Polystyrene	0.3–1.25	500–550	10–11	46.95	1938.47 ± 138.49	89.56 ± 0.69
HPD500	Strong-polar	Polystyrene	0.3–1.2	500–550	10–11	55.54	2132.45 ± 51.53	89.74 ± 2.49
HPD600	Strong-polar	Polystyrene	0.3–1.2	500–600	8	45.37	2063.16 ± 84.36	82.39 ± 5.92
HPD950	Nonpolar	Polystyrene	0.3–1.2	493	8	41.4	1843.88 ± 26.47	66.61 ± 3.98
LSA-10	Middle-polar	Methacrylic	0.3–1.2	500–540	8.4–9.4	49.02	1980.7 ± 82.9	84.05 ± 1.62
LSA-21	Nonpolar	Polystyrene	0.3–1.2	650–700	8.5–9	44.44	1388.96 ± 125.8	87.94 ± 4.35
LX-11	Nonpolar	Polystyrene	0.3–1.2	550	30.1	71.62	1699.18 ± 128.67	82.91 ± 4.35
LX-8	Nonpolar	Polystyrene	0.3–1.2	650–700	8.5–9	45.38	1837.91 ± 80.1	91.71 ± 2.15
NKA-2	Polar	Polystyrene	0.3–1.25	160–200	14–16	40.86	1864.74 ± 54.07	86.04 ± 4.21
X-5	Nonpolar	Polystyrene	0.3–1.25	500–600	29–30	26.14	1657.58 ± 34.01	84.42 ± 6.9
XDA-8	Middle-polar	Polystyrene	0.37–1.25	1000–1100	—	36.88	1601.24 ± 77.28	78.74 ± 4.51

Note. All the analytical results are expressed as mean ± SD (n = 3).