| Method |
Concentration(μg/mL) |
Recovery (% ± RSD)* |
Relative error % |
| Method A |
30
60
90 |
101.24 ± 0.890
97.27 ± 0.237
100.36 ± 0.309 |
-1.24
-2.73
-0.37 |
| Method B |
6
12
18 |
96.85 ± 1.87
102.81 ± 0.37
99.23 ± 2.31 |
-0.031
0.028
-0.037 |
*three determinations were used for the proposed methods |