Abstract：The following analytical conditions were obtained by experiments: the excitation voltage was 1 150 V, the excitation current was 45 mA, the pre-combustion time was 180 s and the integral time was 10 s. Moreover, the photomultiplier voltage of elements was adjusted, realizing the optimal output relationship between elemental content and excitation intensity. The simultaneous determination method of twelve elements in cast iron (including carbon, silicon, manganese, phosphorus, sulfur, nickel, chromium, molybdenum, copper, titanium, vanadium and boron) by direct current glow discharge optical emission spectrometry was established. The matrix iron element was used as internal standard. Six standard samples of alloyed white cast iron for spectral analysis were used to prepare calibration curves based on the relative content and intensity of analytical element to matrix. The correlation coefficients for all elements were higher than 0.994 0. The precision test results indicated that the relative standard deviations (RSD) were between 0.24% and 2.5%. The certified reference materials of grey cast iron were determined according to the proposed method, and the found results were consistent with the certified values. The analysis of white cast iron samples was compared with the spark source atomic emission spectrometry, and the results were consistent.
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