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Journal of Chemistry
/
2019
/
Article
/
Tab 3
/
Research Article
Extraction, Enrichment, and Quantification of Main Antioxidant Aglycones of Flavonoids and Tannins from
Melastoma Dodecandrum
Lour.: Guided by UPLC-ESI-MS/MS
Table 3
Box–Behnken design and result of response surface method analysis.
Run
Methanol concentration (
X
1
) (%)
Extraction time (
X
2
) (min)
Liquid-solid ratio (
X
3
) (ml/mg)
Extraction yield (
μ
mol TE/g)
1
75
30
0.4
2346.21 ± 225.54
2
100
30
0.3
1323.4 ± 181.8
3
50
30
0.5
2380.09 ± 28.83
4
75
30
0.4
2509.85 ± 72.34
5
75
45
0.3
2277.51 ± 155.14
6
100
45
0.4
1214.48 ± 211.17
7
100
30
0.5
1254.07 ± 96.16
8
75
30
0.4
2575.83 ± 113.58
9
75
45
0.5
2575.85 ± 110.16
10
75
15
0.3
2418.72 ± 15.54
11
75
30
0.4
2640.97 ± 429.23
12
50
45
0.4
2632.44 ± 128.83
13
100
15
0.4
1360.9 ± 144.1
14
50
30
0.3
2326.82 ± 55.19
15
75
30
0.4
2779.49 ± 291.99
16
50
15
0.4
2297.45 ± 225.81
17
75
15
0.5
2099.04 ± 89.07