火花源原子发射光谱单次火花放电行为探讨
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摘要
在火花源原子发射光谱中,光源的原子火花放电过程行为复杂,直接观测困难。为了研究原子在单次火花放电发光的行为,利用火花源原子发射光谱仪的时间解析功能和单次火花处理技术设计实验,获取不锈钢标准物质中铁、铝、硅、锰、磷、硫、碳等7个元素的原子在单次火花放电发光的光强随时间分布的时序曲线,通过对各个元素的单次火花光强随时间分布时序曲线的特征分析,得出了原子在单次火花激发过程中发光行为滞后于放电行为、不同元素的原子在同一激发条件下单次火花光强时序曲线的持续时间及发光的最高强度值的时间点存在差异的结论。这为降低火花源原子发射光谱仪的检出限、提高灵敏度以及避免元素间谱线干扰提供了新的途径,同时也为进一步研究火花放电过程中微观粒子的行为提供了新的途径。
The discharge behavior of light source in spark source atomic emission spectrometry was very complicated and it was difficult to observe directly.In order to study the emission behavior of atoms in single spark discharge,the time-resolved function and single spark treatment technique of spark source atomic emission spectrometer were utilized to design the experiments.The chronological sequence curves of light intensity in single spark discharge were obtained for atoms of seven elements in certified reference materials of stainless steel,including iron,aluminum,silicon,manganese,phosphorus,sulfur and carbon.The characteristics of chronological curves between single spark intensity and time were analyzed for each testing element.It was found that the emission behavior of atom in single spark excitation was behind the discharge behavior.The duration of chronological curve of single spark under same excitation condition and the time of maximum intensity of atoms were different for various elements.It provided a new route to decrease the detection limit,improve the sensitivity of spark source atomic emission spectrometer and avoid the spectral interference among elements.Moreover,it also provided a new way to further study the behavior of microscopic particles in spark discharge process.
The discharge behavior of light source in spark source atomic emission spectrometry was very complicated and it was difficult to observe directly.In order to study the emission behavior of atoms in single spark discharge,the time-resolved function and single spark treatment technique of spark source atomic emission spectrometer were utilized to design the experiments.The chronological sequence curves of light intensity in single spark discharge were obtained for atoms of seven elements in certified reference materials of stainless steel,including iron,aluminum,silicon,manganese,phosphorus,sulfur and carbon.The characteristics of chronological curves between single spark intensity and time were analyzed for each testing element.It was found that the emission behavior of atom in single spark excitation was behind the discharge behavior.The duration of chronological curve of single spark under same excitation condition and the time of maximum intensity of atoms were different for various elements.It provided a new route to decrease the detection limit,improve the sensitivity of spark source atomic emission spectrometer and avoid the spectral interference among elements.Moreover,it also provided a new way to further study the behavior of microscopic particles in spark discharge process.
引文
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[2]李冬玲,李美玲,贾云海,等.火花源原子发射光谱法在钢中夹杂物状态分析中的应用[J].冶金分析,2011,31(5):20-26.LI Dong-ling,LI Mei-ling,JIA Yun-hai,et al.Application of spark source atomic emission spectrometry to the state analysis of inclusions in steel[J].Metallurgical Analysis,2011,31(5):20-26.
[3]胡德新,赵江勇,金宝炎,等.低合金钢中非金属夹杂物的检测与表征[J].冶金分析,2014,34(1):17-21.HU De-xin,ZHAO Jiang-yong,JIN Bao-yan,et al.Determination and characterization of non-metallic inclusions in low alloy steel[J].Metallurgical Analysis,2014,34(1):17-21.
[4]KAIZHEN Li,EDMUND Halasz,JEAN-MARC Bohlen,等.单火花分析法测定钢和铝中夹杂物的改进[J].冶金分析,2011,31(12):20-26.KAIZHEN Li,EDMUND Halasz,JEAN-MARC Bohlen,et al.Improvements on analysis of inclusions in steel and aluminum by Spark-DAT[J].Metallurgical Analysis,2011,31(12):20-26.
[5]Edmund Haldsz,Kaizhen Li,Jean-Luc Dorier,等.火花源光发射光谱法分析钢中夹杂物的研究进展[J].冶金分析,2011,31(10):17-21.Edmund Haldsz,Kaizhen Li,Jean-Luc Dorier,et al.Advances in inclusion analysis in steels by spark OES[J].Metallurgical Analysis,2011,31(10):17-21.
[6]赵雷,贾云海,刘庆斌,等.单次放电数字解析技术分析钢铁中夹杂锰的含量[J].冶金分析,2006,26(1):1-5.ZHAO Lei,JIA Yun-hai,LIU Qing-bin,et al.Determination of inclusion manganese content in iron&steel with single discharge analysis[J].Metallurgical Analysis,2006,26(1):1-5.
[7]高宏斌,贾云海,王海舟.钢中不同状态铝的光谱行为研究[C]//第十届全国光谱分析学术年会论文集.北京:中国金属学会,2000.
[8]杨志军,王海舟.用原位分析方法研究连铸板坯的偏析和夹杂[J].钢铁,2003,38(3):61-63.YANG Zhi-jun,WANG Hai-zhou.Reserch on segregation and inclusion of continuous casting slab by original position analysis[J].Iron and Steel,2003,38(3):61-63.
[9]郑建华.火花源原子发射光谱法测定低合金钢中酸溶铝和全铝[J].冶金分析,2005,25(3):64-66.ZHENG Jian-hua.Spark source atomic emission spectrometric determination of acid-soluble aluminium and total aluminium in low alloy steel[J].Metallurgical Analysis,2005,25(3):64-66.
[10]高宏斌,王海舟.金属原位分析夹杂物火花放电行为研究[C]//国际冶金及材料分析测试学术报告会论文集.北京:中国金属学会,2008:867-873.