Concentration of corncob in water (%, w/v) | Concentration of citric acid (μg/mL) (mean ± SD, n = 2) |
6 | 56.6 ± 8.65 |
12 | 176.61 ± 40.24 |
18 | 327.3 ± 3.26 |
24 | 459.6 ± 2.17 |
30 | 137.3 ± 14.14 |
40 | 143.5 ± 19.57 |
60 | 142.7 ± 6.52 |