Abstract：A novel gas circuit structure and detection principle was proposed to solve the problems including both conversion efficiency of conventional technique and subsequent absorption removal in simultaneous determination of oxygen and hydrogen in steel materials. Through studying the effect of analysis power and flux on the release of oxygen and hydrogen, it was determined the optimal analytical power was 2 250 W and the optimal flux was stannum piece. Appropriate standard samples of oxygen and hydrogen in steel were selected for establishing calibration curve, then the determination of oxygen and hydrogen in iron and steel materials by pulse heating-infrared absorption and thermal conductivity method was realized.The detection limit of oxygen and hydrogen calculated with blank standard deviation was 0.000 051% and 0.000 024%, respectively. The analytical range of oxygen and hydrogen was 0.000 05%-0.1% and 0.000 03%-0.05%. The proposed method could avoid the effect of intermediate processing phase on determination accuracy and stability. The determination results of practical samples were consistent with the reference values, completely satisfying the requirements of fast and accurate determination of oxygen and hydrogen in iron and steel materials.
胡少成, 葛程, 马红权, 王超刚, 胡学强, 马飞超, 王蓬. 脉冲加热-红外吸收热导法同时测定钢铁材料中氧和氢[J]. 冶金分析, 2014, 34(4): 37-41.
HU Shao-cheng, GE Cheng, MA Hong-quan, WANG Chao-gang, HU Xue-qiang, MA Fei-chao, WANG Peng. Simultaneous determination of oxygen and hydrogen in steel materials by pulse heating-infrared absorption and thermal conductivity method. , 2014, 34(4): 37-41.
Joseph J Kreuser, Thomas W Junker, Richard A Fork.Simultaneous measurement of hydrogen, nitrogen and oxygen in molten steel[J].AISTech Proceedings, 2004, 1:821- 829.
