Chromatographic study of the reduction of pertechnetate ion by and in hydrochloric acid. Part II. The effect of bromide and iodide ions, and some other parameters on the reduction process

The reduction of pertechnetate ion by dilute hydrochloric acid has been shown to be accelerated by the addition of bromide or iodide ions to the reaction mixture. At room temperature, concentrated hydrochloric acid requires an aging of two years to reduce pentavalent technetium, produced in the first stage byan instantaneous reduction of pertechnetate ion, to chromatographically pure technetium (IV). The rate of the reduction of pertechnetate ion by concentrated hydrochloric acid was found to be independent of the concentraton of ammonium pertechnetate in the range of 0.3–8 mg/ml.