Abstract
A method is described for the determination of 0.0001–0.01% bismuth in high-alloy steels by either atomic absorption spectrometry or atomic fluorescence spectrometry after solvent extraction. After sample dissolution, the bismuth is extracted by ammonium pyrrolidine dithiocarbamate into MIBK and the organic phase is sprayed into an air-acetylene flame (atomic absorption) or an argon-hydrogen-oxygen flame (atomic fluorescence). Extraction of possible interfering elements is prevented by the addition of EDTA and citrate ion. Results for the analysis of four stainless steels are presented.
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