Determination of Trace Elements and Correction of Mass Spectral Interferences in Superalloy Analyzed by Glow Discharge Mass Spectrometry

Mass spectral interference was investigated systematically during the determination of trace elements in superalloy by glow discharge mass spectrometry (GD-MS); moreover the main mass spectral interference and interference level of isotopes were provided in detail. According to the mass spectral interference of elements, different methods were selected for interference correction. The effects of mass spectral interference were removed efficiently by using correction methods such as selecting isotopes without interference, matching sample matrices and deducing interference with multivariable linear regression. The determination results of three superalloy samples show that trace elements such as B, Mg, Ga, As, Ag, In, Sn, Sb, Te, Tl, Pb and Bi were determined successfully after interference correction.

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