激光剥蚀-电感耦合等离子体发射光谱法在中低合金钢成分分析中的应用研究

摘要

The laser ablation (LA) solid direct sampling technology was combined with inductively coupled plasma optical emission spectrometry (ICP-OES),and then applied to the composition analysis of middle-low alloy steel.The analytical line wavelengths of elements in middle-low alloy steel were selected,the background interference was deducted,and the signal drifting was corrected by correcting laser parameters and selecting matrix element Fe (274.9nm) as internal standard.Consequently,the quantitative analysis method of 20 elements in middle-low alloy steel (Al,As,B,C,Co,Cr,Cu,Mn,Mo,Nb,Ni,P,S,Sb,Si,Sn,Ti,V,W and Zr) by LA-ICP-OES was established.The results showed that,except for boron,carbon and sulfur,the linear correlation coefficients of calibration curves of other elements were higher 0.9 or 0.99.The detect limits of elements were low and could meet the determination requirements of middle-low alloy steel.The proposed method was applied to the determination of 20 elements above in standard sample of middle-low alloy steel.The determination results of most elements were consistent with the certified values,and only several elements in several samples showed relatively large deviation.%将激光剥蚀(LA)固体直接进样技术与电感耦合等离子体发射光谱法(ICP-OES)联用,并应用于中低合金钢成分分析.通过选取中低合金钢中各组分元素的分析线波长、扣除干扰背景、校正激光参数和选取基体元素Fe(274.9 nm)作为内标元素校正信号的漂移,建立了中低合金钢中Al、As、B、C、Co、Cr、Cu、Mn、Mo、Nb、Ni、P、S、Sb、Si、Sn、Ti、V、W、Zr 20种元素的LA-ICP-OES定量分析方法.研究结果表明:校准曲线的线性相关系数除硼、碳和硫外,其他元素都在0.9或0.99以上;各元素的检出限比较低,能满足中低合金钢的测定要求.方法用于测定中低合金钢标样中的上述20种元素,除个别元素在个别样品上的测定结果偏差稍大外,其他元素的测定值与认定值一致.