激光诱导击穿光谱定量分析镍铬钼钒钛钢中锰钛镍

来源期刊：冶金分析2010年第10期

论文作者：玉世娟 陈金忠 苏红新 王春生 魏艳红

文章页码：11 - 15

关键词：激光诱导等离子体； 环境气体； 镍铬钼钒钛钢； 锰； 钛； 镍

Key words：laser-induced plasma； ambient gas； nickel-chromium-molybdenum-vanadium-titanium steel； manganese； titanium； nickel

摘    要：利用高能量钕玻璃脉冲激光器(~6J),在常压下的CO₂、空气、N₂和Ar环境中激发诱导金属等离子体光谱,并在Ar气环境下通过激光诱导击穿光谱技术定量分析了国家标准样品镍铬钼钒钛钢中杂质元素Mn、Ti和Ni的含量。实验结果表明,在Ar中得到的等离子体光谱质量比在CO₂、空气和N₂中好,元素含量与光谱线强度之间有较好的线性关系。以Ar作为缓冲气体,在扣除光谱背景的条件下,元素Mn、Ti和Ni分析结果的相对误差分别为6.4%、1.4%和5.6%,相对标准偏差分别为4.6%、8.1%和3.8%;如若不扣除光谱背景,相对误差分别为0.0%、8.6%和1.2%,相对标准偏差分别为4.5%、6.7%和3.6%。这证明,在光谱背景较弱时不必扣除,既节省测量时间,又可获得更为好的分析结果。

Abstract: In this experiment,the spectrum of metal plasma has been generated by using a high-energy neodymium glass laser in CO₂,air,N₂ and Ar atmosphere at normal pressure.The content of Mn,Ti and Ni elements in the national standard steel sample were determined by laser-induced breakdown spectroscopy in Ar atmosphere.The experimental results have shown that the quality of plasma spectrum in Ar atmosphere is better than that in CO₂,air and N₂ atmosphere and the content of the element and its line intensity has a better linear relationship in Ar atmosphere.If the spectral background was deducted,the relative error of the elements Mn,Ti and Ni were 6.4%,1.4% and 5.6%,respectively,and the relative standard deviations were found to be 4.6%,8.1% and 3.8% respectively.While the spectral backgrounds were not deducted,the relative error values were 0.0%,8.6% and 1.2%,respectively,and the relative standard deviations were found to be 4.5%,6.7% and 3.6% respectively.It demonstrated that non-deducting the spectral backgrounds can save the measurement time and get better results when the background was weak.