Abstract
In the direct-reading spectrometric determination of molybdenum, analytical results are often interfered from the overlapping spectral lines of nickel and manganese.
In this paper, new analytical lines of molybdenum, Mo II 2038.46 Å and Mo II 2020.32 Å, were proposed in the wavelength range of 2200 Å to 1780 Å. The line Fe II 1761.38 Å was used as an internal standard. Using these spectral lines, interfering elements, excitation conditions, and reproducibility of the results were investigated.
The best results were obtained under the excitation by a spark of the critically damped discharge of a low voltage condensor. Mo II 2038.46 Å is slightly interfered from the overlapping line of manganese. With Mo II 2020.32 Å, which had no interfering element, however, 0.20% and 1.09% of molybdenum in low alloy steels were determined with the variation coefficients of 2.2% and 1.6%, respectively.
