Table 3 Accuracy and precision data for the determination of the studied drugs by the proposed spectrophotometric method
Parameter | Intra-day precision | Inter-day precision | ||||
|---|---|---|---|---|---|---|
Conc. taken (μg/mL) | Conc. found (μg/mL) | % Found | Conc. taken (μg/mL) | Conc. found (μg/mL) | % Found | |
PPA | 4.0 | 4.03 | 100.75 | 4.0 | 3.97 | 99.25 |
6.0 | 5.98 | 99.67 | 6.0 | 5.88 | 98.00 | |
10.0 | 10.00 | 100.00 | 10.0 | 9.80 | 98.00 | |
± SD | 100.14 ± 0.55 | 98.42 ± 0.72 | ||||
%RSD | 0.55 | 0.73 | ||||
%Er | 0.32 | 0.42 | ||||
EPH | 7.0 | 6.98 | 99.71 | 7.0 | 7.07 | 101.00 |
8.0 | 8.12 | 101.50 | 8.0 | 8.09 | 101.12 | |
10.0 | 10.02 | 100.20 | 9.0 | 9.15 | 101.67 | |
± SD | 100.47 ± 0.92 | 101.26 ± 0.36 | ||||
%RSD | 0.91 | 0.35 | ||||
%Er | 0.52 | 0.20 | ||||
PSE | 6.0 | 6.12 | 102.00* | 6. 0 | 5.96 | 99.33 |
10.0 | 10.23 | 102.30 | 10.0 | 10.07 | 100.70 | |
12.0 | 12.29 | 102.42 | 12.0 | 12.09 | 100.75 | |
± SD | 102.24 ± 0.22 | 100.26 ± 0.80 | ||||
%RSD | 0.21 | 0.80 | ||||
%Er | 0.12 | 0.46 | ||||