飞秒激光剥蚀电感耦合等离子体质谱在地球科学中的应用进展

发布时间：2018-03-05 20:36

本文选题：飞秒激光　切入点：LA-ICP-MS　出处：《光谱学与光谱分析》2017年07期 　论文类型：期刊论文

【摘要】：激光剥蚀电感耦合等离子体质谱(LA-ICP-MS)是原位微区元素含量和同位素比值分析测试的主流技术,已被广泛应用于地球科学等相关领域。飞秒激光剥蚀系统由于其极短的激光脉宽大大降低甚至消除了传统纳秒激光剥蚀产生的热效应导致的元素分馏问题,在非基体匹配分析等方面显示出巨大发展潜力,已成为当前LA-ICP-MS技术的一个新的发展趋势和研究热点。介绍了飞秒激光剥蚀系统的基本特征(飞秒激光及产生原理、当前商用飞秒激光器种类),重点阐述了飞秒激光剥蚀地球科学样品的机理(样品对激光能量的吸收方式、气溶胶的产生和粒度分布特征、剥蚀坑的形貌特征等),评述了飞秒激光剥蚀在改善分析性能方面的独特优势,最后总结了近十几年来它在地球科学样品元素含量和同位素比值分析中的实际应用,并展望了该技术的应用前景。
[Abstract]:Laser denudation inductively coupled plasma mass spectrometry (LA-ICP-MS) is the main technique for analysis and measurement of element content and isotopic ratio in situ microregion. Femtosecond laser denudation system has been widely used in earth science and other related fields. Because of its extremely short laser pulse width, the fractionation of elements caused by the thermal effect of traditional nanosecond laser denudation has been greatly reduced or even eliminated. It has shown great potential in non-matrix matching analysis and has become a new development trend and research hotspot in current LA-ICP-MS technology. The basic characteristics of femtosecond laser denudation system (femtosecond laser and its generation principle) are introduced. In the present commercial femtosecond laser, the mechanism of denudation of geoscience samples by femtosecond laser (the absorption mode of laser energy, the generation and particle size distribution of aerosol) are described. This paper reviews the unique advantages of femtosecond laser denudation in improving the analytical performance of the denudation pit, and summarizes its practical application in the analysis of element content and isotope ratio of geoscience samples in the last ten years. The application prospect of this technology is also prospected.
【作者单位】：中国地质大学(武汉)地质过程与矿产资源国家重点实验室;
【基金】：国家自然科学基金项目(41322023,41373026,41573015)资助
【分类号】：O657.63;P595

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