Table 4 Recovery and relative standard of the proposed sensors against official method (HPLC).
Electrode Type | [oxytrol] Taken ppm | Calibration method | Standard addition method | ||||
|---|---|---|---|---|---|---|---|
Found ppm | Recovery (%) | RSD % | Found ppm | Recovery (%) | RSD % | ||
I | 7.878 | 7.756 | 98.45 | 0.52 | 7.716 | 97.94 | 0.45 |
II | 7.814 | 99.14 | 0.32 | 7.856 | 99.72 | 0.28 | |
III | 7.809 | 99.12 | 0.24 | 7.796 | 98.95 | 0.38 | |
Official method HPLC29 | 7.877 | 99.84 | 0.31 | 7.806 | 99.09 | 0.25 | |
