Line Selection and Determination of Trace Amounts of Elements in High-Purity Iron by Inductively Coupled Plasma Atomic Emission Spectrometry

Abstract The iron matrix effect on the determination of trace amounts of Zn, Pb, Mn, Cd, Cr, Cu, and Co was studied. An analytical profile of 21 spectral lines of these elements were made, in order to inspect the spectral interference and to study the background in the region of each line using iron solutions of different concentrations. Interference free spectral lines, for some elements, have been recommended to be used for analysis. Recoveries from the iron commercial product spiked with 0.100 μg each of seven analytes are reported. For determination of trace metal a removal of iron by solvent extraction technique prior to the instrumental measurements was required.