原子发射光谱法测定合金结构钢和电工钢中氮

叙述了用原子发射光谱法快速定量分析合金结构钢和电工钢中氮。文中对测定氮的光谱线的选择、氮的分析条件、分析样品的制备、共存元素的影响和钢中氮的校准曲线的拟合等问题进行了讨论。本方法氮的分析范围为０.０００５％～０.０４０％，检出限为０.０００３７４％，分析时间小于２ｍｉｎ（包括样品制备和样品两次激发分析）。实现了样品一次激发可同时测定氮和合金元素以及酸溶铝、酸不溶铝。

Determination of Nitrogen in Alloy Constructional Steel and Electrical Engineering Steel Using Optical Emission Spectrometry

The rapid quantitative analysis of nitrogen in alloy constructional steel and electrical engineering steel with optical emission spectrometry is described. The problems about the selection of spectral line for determination of nitrogen, the analytical conditions of nitrogen, the preparation of analytical sample, the effect of co-existing elements and the calibration curve of nitrogen are discussed. In this method, the analytical range of nitrogen is 0 0005% to 0 040%, the limit of detection is 0 000374%, the analytical time is less than 2 minutes (including the preparation of sample and the exciting sample for two times). Nitrogen in steel is simultaneously determined with alloy elements and acid soluble/insoluble compounds of aluminium.