Abstract：Carbon, silicon, manganese, phosphorus and sulfur in oriented silicon steel were determined by spark source atomic emission spectrometry. The selected excitation conditions were as follows: the analytical flow rate of argon was 3.5 L/min, the static flow rate was 0.75 L/min, the flush time was 3 s, the precombustion time was 12 s and the integration time was 5 s. Two sample preparation methods, including milling machine and grinding wheel, were investigated. The precision test results showed that, the determination results were slightly affected by the sample preparation method. The effect of possible coexisting elements on the determination of carbon, silicon, manganese, phosphorus and sulfur in oriented silicon steel was discussed. It was found that, the interference of silicon on manganese could not be avoided. After correction by interference coefficient method, the correlation coefficients of calibration curves of all elements by fitting were higher than 0.999 0. Precision test was performed,and the relative standard deviations (RSD, n=10) were between 0.71 % and 9.4 %. Two oriented silicon steel production samples were analyzed by proposed method and Central Iron and Steel Research Institute (CISRI). The found results were consistent. Moreover, the deviation was within the allowance range.
