Table 2 Kinetic data of DPPH radical scavenging activity of ascorbic acid and C. mollis extracts at different concentrations
Sample | Concentration (µg/mL) | Half-life, t1/2 (min) | Steady-state time(min) | k2(M−1 s−1) | Remaining [DPPH] at a steady-state |
|---|---|---|---|---|---|
Methanol extract | 250 | 0.99 | 16.53 | 115.08 | 56.98 |
100 | 1.31 | 21.94 | 87.13 | 73.4 | |
50 | 2.13 | 28.04 | 53.28 | 84.4 | |
Chloroform extract | 250 | 4.57 | 63.49 | 24.51 | 57.77 |
100 | 6.40 | 94.58 | 17.94 | 71.88 | |
50 | 7.63 | 129.58 | 14.96 | 84.61 | |
Petroleum ether extract | 250 | 4.85 | 66.97 | 23.39 | 55.30 |
100 | 6.65 | 96.34 | 17.04 | 74.92 | |
50 | 7.66 | 112.93 | 14.68 | 86.50 | |
Ascorbic acid | 250 | 0.60 | 10.02 | 189.18 | 6.43 |
100 | 0.70 | 13.15 | 162.41 | 13.06 | |
50 | 1.04 | 15.82 | 109.80 | 17.05 |