Mercurous nitrate as a reductimetric reagent. The interference of the more common cations and anions in the determination of iron

Article abstract of DOI:10.1016/S0003-2670(00)87546-7

The interfering effect of most of the more common cations and anions on the titration of ferric iron with mercurous nitrate has been examined. As would be expected, ions capable of oxidising ferrous iron interfere. Certain other cations and anions interfere, but in several cases this effect can be eliminated. Copper and thallium must be completely absent, and ions which give coloured products with thiocyanate ions, e.g., molybdenum.