Table 4 Results of the precision of the methods.
Precision | HPLC method | Spectrophotometric method | ||||
|---|---|---|---|---|---|---|
Retention time, min. | Peak area | Assay % | Absorbance | Assay % | ||
Intraday | Average | 3.038 | 1253.68 | 100.00 | 1.070 | 100.00 |
SD | 0.001 | 0.781 | 0.062 | 0.001 | 0.108 | |
RSD % | 0.033 | 0.062 | 0.062 | 0.108 | 0.108 | |
Interday | Average | 3.037 | 1252.67 | 100.00 | 1.074 | 100.01 |
SD | 0.002 | 1.527 | 0.122 | 0.002 | 0.135 | |
RSD % | 0.079 | 0.122 | 0.122 | 0.135 | 0.135 | |
