Interference effect of various cations with NDNA/nafion/GCEa.
| Metal ions | Observed current (μA) | Interference effect (%) | SD (n = 3) | RSD (%) (n = 3) | |||
|---|---|---|---|---|---|---|---|
| R 1 | R 2 | R 3 | Average | ||||
| Sb3+ | 9.0214 | 9.2104 | 9.6461 | 9.2926 | 100 | 0.320 | 3.44 |
| As3+ | 3.7026 | 3.1622 | 4.2134 | 3.6927 | 39 | 0.525 | 14.23 |
| Ce3+ | 2.0452 | 2.5146 | 1.6454 | 2.0684 | 22 | 0.435 | 21.03 |
| Cr3+ | 1.3736 | 1.5109 | 1.4631 | 1.4492 | 15 | 0.069 | 4.80 |
| Cu2+ | 1.5437 | 1.3383 | 1.9694 | 1.6171 | 17 | 0.321 | 19.90 |
| Hg2+ | 1.0972 | 0.9170 | 1.3465 | 1.1202 | 12 | 0.215 | 19.25 |
| Ni2+ | 4.7218 | 5.0739 | 4.4944 | 4.7633 | 51 | 0.291 | 6.12 |
| Sn2+ | 1.5799 | 1.4827 | 1.8366 | 1.6330 | 17 | 0.182 | 11.19 |
| Y3+ | 3.1301 | 2.4540 | 3.6794 | 3.1301 | 33 | 0.613 | 19.87 |
a
Interference effect of Sb3+ is considered to be 100%; R = reading; SD = standard deviation; and RSD = relative standard deviation; n = number of readings.