Modification on the Determination of Sulfur of Stainless Steels with High-Manganese Contents by Photoelectric Direct-Reading Atomic Emission Spectrometry

It was shown that in the determination of sulfur in samples of stainless steels with high manganese contents using the Fe-30 analytical program supplied by the Spectro Lab M8 photoelectric direct-reading atomic emission spectrometer, low results were obtained. As a modification, the matrix correction mode for interfering elements (esp. for manganese) and the regression analytical curve for determination of sulfur in stainless steels were re-established by using another set of standard samples (including national standard samples and control standard samples with high manganese contents). In the analysis of 7 standard samples of stainless steels with both low and high contents of manganese by the modified program, analytical results of sulfur in consistency with the certified values were obtained, giving values of absolute errors less than the tolerance given by JIS.