Table of tolerance limits of foreign ionsa, tolerance ratio [species(x)/Mn (w/w)].
| Species x | Tolerance ratio x/Mn (w/w) | Species x | Tolerance ratio x/Mn (w/w) |
|---|---|---|---|
| Ammonium(i) | 1000 | Lithium | 1000 |
| Arsenic(iii) | 500b | Lead(ii) | 200 |
| Arsenic(v) | 500 | Magnesium | 1000 |
| Aluminum | 200 | Manganese(ii), manganese(iv) | 1000, 500 |
| Azide | 200 | Mercury(ii) | 200 |
| Ascorbic acid | 1000 | Molybdenum(vi) | 500 |
| Antimony | 500 | Nitrate | 1000 |
| Bromide | 100 | Nickel | 500 |
| Bismuth(iii) | 500 | Oxalate | 1000 |
| Beryllium(ii) | 1000 | Potassium | 1000 |
| Calcium | 1000 | Phosphate | 1000 |
| Chloride | 1000 | Selenium(vi) | 500 |
| Cobalt(ii) | 200c | Selenium(iv) | 50c |
| Cobalt(iii) | 500 | Silver | 500 |
| Chromium(iii) | 1000 | Sodium | 1000 |
| Chromium(vi) | 100c | Strontium | 500 |
| Cadmium | 1000 | Sulfate | 500 |
| Carbonate | 1000 | Titanium(iv) | 100 |
| Cesium | 1000 | Tellurium(iv) | 500 |
| Citrate | 1000 | Tartrate | 1000 |
| Cerium(iii) | 500 | Copper(ii) | 500 |
| Cerium(iv) | 500b | Thiocyanate | 1000 |
| Cyanide | 200 | Thiourea | 100 |
| EDTA | 1000 | Tungsten(vi) | 1000 |
| Fluoride | 1000 | Tin(ii) | 50b |
| Iodide | 1000 | Tin(iv) | 50b |
| Iron(ii) | 200 | Vanadium(v) | 1000 |
| Iron(iii) | 200 | Zinc | 1000 |
a
Tolerance limit was defined as ratio that causes less than ±5 percent interference.
b
With 10 mg L−1 tartrate.
c
With 10 mg L−1 EDTA.