Table 3 Detection limit, calibration and goodness of fit for anions measured at 25.0 °C
From: Determining detection limits of aqueous anions using electrochemical impedance spectroscopy
Ion | Detection limit (ppt) | Detection limit (nM) | Slope (Ω−1) | Error (± Ω−1) | Intercept (Ω) | Error (±Ω) | R 2 correlation |
|---|---|---|---|---|---|---|---|
Carbonate | 16 | 0.02 | 232 | 18 | 362 | 111 | 0.9942 |
Bicarbonate | 129 | 2.1 | 309 | 6 | 779 | 19 | 0.9998 |
Chloride | 13 | 0.4 | 296 | 6 | 330 | 29 | 0.9996 |
Acetate | 128 | 2.1 | 325 | 35 | 583 | 118 | 0.9943 |
Sulfate | 2.0 | 0.02 | 180 | 15 | 1201 | 83 | 0.9965 |