Abstract
Trace amounts of Co, Cu, Fe, Mg, Mn, Ni, Ti and Zr in vanadium metal and vandium-aluminium alloy were determined by ICP-AES after coprecipitation with bismuth hydroxide. After V(III, IV) ions were oxidized to V(V) ion with hydrogen peroxide at pH 12, the 8 trace elements were coprecipitated quantitatively with bismuth hydoxide and separated from the V and Al matrices. Cr, Mo and Pb did not show quantitative recovery, due to the formation of their oxocompounds under these conditions. The precision of the present method was within 10% relative standard deviation for each element.
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