Table 2 Accuracy of the proposed spectrophotometric methods using standard addition method
Amount taken (μg mL−1) | Amount added (μg mL−1) | Amount found (μg mL−1) | % recovery ± SD | ||||
|---|---|---|---|---|---|---|---|
SLD | MRB | SLD | MRB | SLD | MRB | SLD | MRB |
DW | |||||||
 2.00 | 4.00 | 0.00 | 0.00 | 2.00 | 3.98 | 100.05 ± 0.94 | 99.50 ± 0.45 |
 2.00 | 4.00 | 1.00 | 2.00 | 3.01 | 5.90 | 100.40 ± 0.58 | 98.39 ± 0.22 |
 2.00 | 4.00 | 4.00 | 8.00 | 6.05 | 12.11 | 100.84 ± 0.45 | 100.89 ± 0.29 |
 2.00 | 4.00 | 13.00 | 21.00 | 15.08 | 24.86 | 100.55 ± 0.28 | 99.44 ± 0.26 |
IDW | |||||||
 2.00 | 4.00 | 0.00 | 0.00 | 2.00 | 4.00 | 99.89 ± 0.49 | 100.11 ± 0.29 |
 2.00 | 4.00 | 1.00 | 2.00 | 2.99 | 5.93 | 99.57 ± 1.08 | 98.79 ± 1.21 |
 2.00 | 4.00 | 4.00 | 8.00 | 6.02 | 12.04 | 100.34 ± 0.38 | 100.34 ± 0.77 |
 2.00 | 4.00 | 13.00 | 21.00 | 15.13 | 25.25 | 100.87 ± 0.56 | 101.00 ± 0.36 |
RD | |||||||
 2.00 | 4.00 | 0.00 | 0.00 | 2.00 | 4.02 | 100.23 ± 0.68 | 100.87 ± 0.54 |
 2.00 | 4.00 | 1.00 | 2.00 | 2.99 | 5.95 | 99.54 ± 0.69 | 99.09 ± 0.54 |
 2.00 | 4.00 | 4.00 | 8.00 | 6.00 | 12.10 | 99.96 ± 0.96 | 100.86 ± 0.88 |
 2.00 | 4.00 | 13.00 | 21.00 | 15.02 | 25.12 | 100.13 ± 0.59 | 100.48 ± 0.58 |
AUC | |||||||
 2.00 | 4.00 | 0.00 | 0.00 | 1.97 | 3.99 | 98.70 ± 0.73 | 99.67 ± 1.30 |
 2.00 | 4.00 | 1.00 | 2.00 | 2.99 | 5.92 | 99.57 ± 0.46 | 98.61 ± 0.59 |
 2.00 | 4.00 | 4.00 | 8.00 | 6.08 | 11.90 | 101.37 ± 0.49 | 99.19 ± 0.49 |
 2.00 | 4.00 | 13.00 | 21.00 | 14.82 | 24.93 | 98.83 ± 0.71 | 99.72 ± 0.42 |