Table 2.
Tolerance limits of diverse ions.
| Diverse ion | Tolerance limit (μg mL−1) | Diverse ion | Tolerance limit (μg mL−1) | ||
| In the presence of 1.173 μg mL−1 of Ni(II) | In the presence of 1.18 μg mL−1 of Co(II) | In the presence of 1.173 μg mL−1 of Ni(II) | In the presence of 1.18 μg mL−1 of Co(II) | ||
| Ascorbic acid | 3000 | 3200 | Pb(II) | 2200 | 2000 |
| Tartrate | 2800 | 2700 | W(VI) | 1900 | 1800 |
| Citrate | 2600 | 2500 | U(VI) | 1800 | 1750 |
| EDTA | 2400 | 2400 | Zr(IV) | 1500 | 1400 |
| Thiourea | 2000 | 2100 | Cd(II) | 1300 | 1200 |
| Formate | 1900 | 2000 | Li(I) | 1200 | 1100 |
| Urea | 1700 | 1800 | Th(IV) | 1000 | 950 |
| Bromate | 1650 | 1700 | Na(I) | 950 | 900 |
| Oxalate | 1600 | 1650 | Te(IV) | 800 | 800 |
| Bromide | 1500 | 1400 | K(I) | 750 | 800 |
| Phosphate | 1450 | 1400 | Cu(II) | 700 | 750 |
| Nitrate | 1400 | 1350 | Al(III) | 650 | 600 |
| Chloride | 1200 | 1300 | Zn(II) | 550 | 450 |
| Sulphate | 1100 | 1150 | Pt(IV) | 400 | 400 |
| Acetate | 1050 | 1000 | Fe(II) | 350 | 400 |
| Thiosulphate | 1000 | 900 | Pd(II) | 300 | 350 |
| Iodide | 850 | 800 | V(V) | 250 | 300 |
| Fluoride | 800 | 700 | Ru(III) | 250 | 250 |
| — | — | — | Ti(IV) | 220 | 200 |
| — | — | — | Cr(III) | 200 | 180 |
| — | — | — | Ce(IV) | 180 | 150 |
| — | — | — | Mo(VI) | 150 | 140 |
| — | — | — | Mn(II) | 130 | 125 |