Table 2: Precision of the potentiometric method for GEMI determination.
| Concentration | Taken (-log C) | Found (-log C) | Recovery % ± RSD* |
|---|---|---|---|
| 1 × 10-3 M | 3 | 2.988 | 99.6 ± 1.12 |
| 5 × 10-5 M | 4.3 | 4.356 | 101.3 ± 1.26 |
| 1 × 10-6 M | 6 | 6.023 | 100.38 ± 1.74 |
*values are mean of three determinations; RSD = (SD /mean*100).