Abstract
Although quite precise under rigidly controlled conditions, the mercury(I) amperometric titration, at a rotating platinum electrode, of submillinormal concentrations of copper(II) in potassium thiocyanate-perchloric acid medium gives results that vary with the concentrations of thiocyanate and of copper(II). When this variation is eliminated by the addition of potassium iodide, the titration of 10–5N to 10–4N copper(II) is precise and accurate to within ±1·5 per cent. The titration of 10–6N copper(II) is precise to about 5 per cent.
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