钢中稀土镧、铈、钇分析检测研究

通过电感耦合等离子体发射光谱法、全谱火花直读法测定样品的稀土含量及强度比，构建含量与强度比的数据库，并结合所筛选的分析线绘制出适用于火花直读光谱仪的标准分析曲线，以实现钢中稀土镧、铈、钇在线快速分析检测。研究表明，镧、铈、钇元素在各自选取的2条分析线下绘制的标准分析曲线相关系数基本上满足大于0.999要求，符合实验室要求。在已绘制的标准分析曲线下测定检验试样中镧、铈、钇含量并与ICP-AES测定结果相比较，相较于标准分析曲线La#1、Ce#2和Y#2，在标准分析曲线为La#2和Ce#1、Y#1的条件下测得镧、铈、钇含量的偏差率更小，检测结果重复性更好，准确性更高。 

On-line analysis and detection of rare earth lanthanum,cerium and yttrium in steel

The content and intensity ratio of rare earth in samples were determined by ICP-AES and full spectrum spark direct reading method, and the database of content and intensity ratio was constructed. The standard analysis curve suitable for spark direct reading spectrometer was drawn in combination with the selected analysis lines, so as to realize on-line rapid analysis and detection of rare earth lanthanum, cerium and yttrium in steel. Studies have shown that the correlation coefficients of the standard analysis curves drawn under the 2 analysis lines selected for lanthanum, cerium, and yttrium basically meet the requirements of greater than 0.999, which met the requirements of the laboratory. The contents of lanthanum, cerium and yttrium in the test sample were determined under the drawn standard analysis curve and compared with the results determined by ICP-AES. The results show that compared with the standard analysis curves La#2, Ce#1 and Y#1, the difference range between the measured contents of La#2, Ce#1 and Y#1, the deviation rate is smaller, and the repeatability and accuracy of the detection results are better.