Determination of Sixteen Elements in Alloy Steel by Direct Current Glow Discharge Atomic Emission Spectrometry

The contents of 16 elements in alloy steel were determined by DC glow discharge atomic emission spectrometry. Iron was used as internal standard. Optimum conditions were found as follow: ① voltage of photomultiplier tube: 850 V;② excitation voltage: 1 000 V;③ excitation current: 50 mA;④ pre-burning time: 45 s;⑤ integration time: 15 s. Values of RSD′s (n=11) of 16 elements found were less than 4.0%. The proposed method was applied to the analysis of CRM of alloy steel (GBW 01399) and standard sample (BS LAS-9),giving results in consistency with standard values.