| 多径腔增强激光诱导击穿光谱用于合金中痕量元素的高灵敏检测 |
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| 引用本文： | 白禹,王树青,张雷,尹王保,肖连团,贾锁堂.多径腔增强激光诱导击穿光谱用于合金中痕量元素的高灵敏检测[J].冶金分析,2021,40(12):34-38. |
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| 作者姓名： | 白禹 王树青 张雷 尹王保 肖连团 贾锁堂 |
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| 作者单位： | 1.山西大学激光光谱研究所,量子光学与光量子器件国家重点实验室,山西太原 030006;2.山西大学,极端光学协调创新中心,山西太原 030006;3.中国石油化工股份有限公司石油化工科学研究院,北京 100083 |
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| 基金项目： | 国家能源石油炼制技术研发中心开放基金(ZC0607-0003);国家重点研发计划(2017YFA0304203);长江学者和创新团队发展计划(IRT_17R70);国家自然科学基金(11434007,61975103,61875108,61775125);山西省科技重大专项(201804D131036);111计划(D18001);山西省“1331工程”重点学科建设计划(1331KSC) |
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| 摘 要： | 激光诱导击穿光谱(LIBS)在合金表面痕量元素分析领域具有重要的潜在应用价值,尽管LIBS甚至是双脉冲LIBS(DP-LIBS)已具有很高的检测灵敏度,但对部分元素的检出限(LOD)仍无法满足某些应用需求。为了进一步降低DP-LIBS的LOD,提出了一种共心多径腔(CMC)增强DP-LIBS(CMC-DP-LIBS)技术,使双脉冲激光中的再加热激光在CMC腔室内经多次反射和会聚来持续加热等离子体,充分利用再加热激光的能量,最终实现光谱信号和检测灵敏度的提升。对锌样品表面Mn元素检测的实验结果显示,CMC-DP-LIBS较正交再加热DP-LIBS的LOD降低了63%,说明了CMC-DP-LIBS确实大幅提升了LIBS的检测灵敏度,提升了LIBS在合金表面痕量元素分析中的应用价值,特别是对样品烧蚀及损伤有特殊需求的应用领域。
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| 关 键 词： | 激光诱导击穿光谱(LIBS) 再加热双脉冲 共心多径腔增强 痕量元素 检出限 |
| 收稿时间： | 2020-06-01 |
Sensitive trace element analysis of alloys using multipass cell enhanced laser-induced breakdown spectroscopy |
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| BAI Yu,WANG Shu-qing,ZHANG Lei,YIN Wang-bao,XIAO Lian-tuan,JIA Suo-tang.Sensitive trace element analysis of alloys using multipass cell enhanced laser-induced breakdown spectroscopy[J].Metallurgical Analysis,2021,40(12):34-38. |
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| Authors: | BAI Yu WANG Shu-qing ZHANG Lei YIN Wang-bao XIAO Lian-tuan JIA Suo-tang |
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| Affiliation: | 1. Institute of Laser Spectroscopy, State Key Laboratory of Quantum Optics and Quantum Optics Devices,Shanxi University, Taiyuan 030006, China;2. Collaborative Innovation Center of Extreme Optics, Shanxi University,Taiyuan 030006, China;3. Research Institute of Petroleum Processing, Sinopec, Beijing 100083, China |
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| Abstract: | Laser-induced breakdown spectroscopy (LIBS) has great potential in surface trace element analysis of alloys. Although LIBS, even double-pulse LIBS (DP-LIBS) has greatly improved the sensitivity, its limit of detection (LOD) is not sufficient for some applications. To further improve the sensitivity of DP-LIBS, concentric multipass cell (CMC) enhanced DP-LIBS (CMC-DP-LIBS) technique was proposed, which using CMC to reflect and refocus the reheating laser pulse, heating the plasma continuously. The energy of reheating laser was fully used in this way, thus improving the spectral signal and sensitivity. The results based on the detection of Mn on the surface of Zn samples showed that CMC-DP-LIBS lowered the LOD of Mn by 63% compared with orthogonal reheating DP-LIBS, which indicated that CMC-DP-LIBS indeed greatly improved the sensitivity of LIBS, and was able to expand more application in surface trace element analysis of alloys, especially for the field where the ablating and damage of the samples were restricted. |
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| Keywords: | laser-induced breakdown spectroscopy (LIBS) reheating double pulse concentric multipass cell enhanced trace element limit of detection (LOD) |
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