TABLE 3.
Effects of coexisting substances (c = 0.50 μg/mL).
| Coexisting substance | Times | Ralative error (%) | Coexisting substance | Times | Ralative error (%) | Coexisting substance | Times | Ralative error (%) |
| NO3– | 500 | 2.5 | Mg(II) | 800 | 2.5 | Fe(III) | 500 | 2.4 |
| Cl– | 20 | 2.4 | Pb(II) | 700 | 0.6 | Al(III) | 400 | −4.3 |
| SO42– | 400 | 3.1 | Cd(II) | 600 | 3.8 | Au(III) | 200 | 3.2 |
| PO43– | 500 | 3.5 | Zn(II) | 900 | −2.6 | Sb(III) | 300 | 1.9 |
| NH4+ | 1000 | −4.2 | Mn(II) | 500 | 2.4 | Bi(III) | 300 | 1.2 |
| Na+ | 800 | 2.6 | Hg(II) | 200 | 1.8 | Ir(III) | 200 | 2.5 |
| K+ | 800 | −3.4 | Ni(II) | 400 | 4.0 | Rh(III) | 400 | 3.4 |
| Pd(II) | 400 | 2.1 | Co(II) | 400 | 2.9 | Pt(IV) | 500 | 2.7 |
| Ca(II) | 500 | −3.0 | Cu(II) | 700 | 1.2 | W(VI) | 400 | 1.9 |