Table 2 Method performance and validation data.
Parameter | Value | |
|---|---|---|
Linearity range, (M) | 1.0 × 10–7–1.0 × 10–1 | |
Slope, (mV/decade) | 29.14 ± 0.3 | |
Correlation coefficient, r2 | 0.9998 | |
pH range | 2–9 | |
Response time, (s) | 20 | |
LOD, (M) | 7.5 × 10–8 | |
Shelf life, (d) | 180 | |
Accuracy, % R | 96.85 | |
Precision, %RSD | Repeatability | 2.79 |
Intermediate precision | 2.44 | |
Selectivity coefficients,\({\text{k}}_{{\text{a},\text{b }}^{\text{pot}}}\) | Sodium chloride | 0.022041 |
Potassium chloride | 0.047267 | |
Magnesium chloride | 0.411651 | |
Sodium phosphate | 0.048825 | |
Zinc chloride | 0.000336 | |
Sodium carbonate | 0.001465 | |
