Table 3: Robustness of potentiometric method for GEMI determination.
Parameter | Value | Recovery % ± RSD* |
---|---|---|
Standard conditions | 99.1 ± 0.44 | |
pH | 2.5 | 98.5 ± 0.39 |
3.5 | 99.1 ± 0.45 | |
Temperature (℃) | 30 | 98.3 ± 0.29 |
40 | 96.2 ± 0.63 | |
Volume of buffer (ml) | 2 | 99.3 ± 0.93 |
8 | 98.7 ± 0.66 | |
Reaction time (sec) | 2 | 96.3 ± 0.74 |
10 | 98.6 ± 0.48 |
(*values are mean of 3 determinations); RSD = (SD /mean*100).