Determination of iron in Zircaloy-2 and Zircaloy-4 by differential-pulse polarography
Abstract
The alloy sample was dissolved in hydrofluoric acid and a portion of the resulting stock solution was heated with sulphuric acid to remove fluoride ion. Tin(II) chloride solution was then added to ensure complete reduction of Fe3+ to Fe2+. Solid sodium citrate was added to form a citrate complex with Fe2+. The polarographic peak of the Fe2+-citrate complex was then used as a measure of the percentage of iron in Zircaloy alloys.