Table 3. Effect of conventional solvent and ionic liquids on the extraction of total anthocyanins from grape skin.
Solvent | w(total anthocyanins)/(mg/g) |
---|---|
CH3OH/H2O/HCl (70:29.5:0.5) | (16.2±0.3)fg |
[C2mim][Br]_0.5 M | (14.1±0.3)e |
[C2mim][Br]_1.5 M | (16.4±0.1)fg |
[C2mim][Br]_2.5 M | (17.9±0.2)h |
[C4mim][Br]_0.5 M | (13.8±0.3)de |
[C4mim][Br]_1.5 M | (15.8±0.2)f |
[C4mim][Br]_2.5 M | (15.9±0.1)f |
[C5mim][Br]_0.5 M | (13.2±0.1)cd |
[C5mim][Br]_1.5 M | (13.8±0.2)de |
[C5mim][Br]_2.5 M | (13.9±0.1)de |
[C7mim][Br]_0.5 M | (12.9±0.2)c |
[C7mim][Br]_1.5 M | (13.2±0.2)cd |
[C10mim][Br]_0.5 M | (4.5±0.1)a |
[C10mim][Br]_1.5 M | (4.1±0.2)a |
[mim][HSO4]_0.5 M | (13.8±0.1)de |
[mim][HSO4]_1.5 M | (16.2±0.2)fg |
[mim][HSO4]_2.5 M | (16.9±0.2)g |
[sC4mim][HSO4]_0.5 M | (13.8±0.3)de |
[sC4mim][HSO4]_1.5 M | (15.9±0.1)f |
[sC4mim][HSO4]_2.5 M | (16.4±0.1)fg |
[mim][CF3CO2]_0.5 M | (8.7±0.2)b |
[mim][CF3CO2]_1.5 M | (8.4±0.1)b |
[mim][CF3CO2]_2.5 M | (8.7±0.2)b |
Data are presented as average value of three repetitions±standard deviation (N=3). ANOVA was used to compare the data; different letters indicate statistical differences between different solvents (Tukey’s test, p<0.05)