Table 5 Accuracy and precision data for the determination of benzophenone by the proposed methods
From: Derivative spectrophotometric analysis of benzophenone (as an impurity) in phenytoin
Parameters | First derivative method (1D) | Third derivative method (3D) | Ratio derivative method (1DD) | |
|---|---|---|---|---|
Intra-day | % Found(a) | 099.55 | 099.68 | 100.09 |
099.96 | 101.36 | 101.21 | ||
100.34 | 099.56 | 099.23 | ||
Mean () | 099.95 | 100.20 | 100.18 | |
S.D. | 0.39 | 1.00 | 0.99 | |
%RSD | 0.39 | 1.00 | 0.99 | |
%Error | 0.16 | 0.41 | 0.40 | |
Inter-day | 1st day | 100.10 | 102.06 | 100.31 |
2nd day | 100.90 | 101.59 | 098.99 | |
3rd day | 101.98 | 100.66 | 100.11 | |
Mean () | 100.99 | 101.43 | 099.80 | |
S.D. | 0.94 | 0.71 | 0.71 | |
%RSD | 0.94 | 0.70 | 0.71 | |
%Error | 0.38 | 0.29 | 0.29 |