Determination of Molybdenum in Iron and Steel with Vacuum Spectrometer

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In the direct-reading spectrometric determination of molybdenum, the overlapping spectral lines of nickel and manganese often interfere with analytical results. In this paper, analytical lines of molybdenum, Mo II 2038.46 A and Mo II 2020.32 A, are newly proposed, making use of iron line Fe II 1761.38A as an internal standard. With these spectral lines, interfering elements, excitation conditions, and reproducibility of the results were investigated. The best results were obtained under the excitation of the critically damped discharge of a low voltage condenser spark. The overlapping line of manganese slightly interfered with Mo II 2038.46A. With Mo II 2020.32 A, which had no interfering element, 0.20% and 1.09% of molybdenum in low alloy steels were determined with the variation coefficients of 2.2% and 1.6%, respectively.
東北大学の論文