Use of cupferron as a precipitant for the determination of impurities in high-purity iron by ICP-AES.
Impurities in high-purity Fe were determined by ICP-AES using zinc as an internal standard after a precipitation-separation with cupferron. The detection limits (in microg/g) of the impurity elements were as follows: V 0.03, Hf 0.1, Mo 0.1, Nb 0.1, Ga 0.3, Zr 0.6 and Ti 0.9.
Danzaki
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Institute for Materials Research, Tohoku University, 2-1-1, Katahira, 980-77, Aoba, Sendai, Japan.