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 (m2/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).