Comparison of ICP Atomic Emission Intensities on Axial and Radial Views, and Determination of Trace Amounts of As, Sb and Sn in Iron and Steel

Trace amounts of As, Sb and Sn in iron and steel were determined by ICP-OES. Intensities of some atomic emission lines were simultaneously determined from axial or radial view of argon plasma, Atomic emission intensities from the axial view were higher about 37 to 53 times than those from the radial view. Detection limits of As, Sb and Sn were order of 1 ppm in iron and steel by axial view measurement. Detection limit of As was lowered to order of 0.1 ppm after removal of iron as main component in sample solution with co-precipitation of MnO₂.