A simple laser ICP-MS ablation cell with wash-out time less than 100 ms
A simple laser ICP-MS ablation cell with wash-out time less than 100 ms
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DOI：
10.1039/b704700b
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发表时间：
2007-08
影响因子：
3.4
通讯作者：
E. Gurevich;R. Hergenröder
中科院分区：
文献类型：
--
作者：
E. Gurevich;R. Hergenröder
本文提出了一种用于激光烧蚀电感耦合等离子体质谱（LA-ICP-MS）的烧蚀池的新概念。在烧蚀区域中的冲洗气流中的湍流的抑制显著地减少了烧蚀单元的冲洗时间。设计了一个能使ICP-MS脉冲持续时间降低到几十毫秒的消融室。实验研究了层流和湍流条件下烧蚀气溶胶的ICP-MS峰幅、峰宽和峰形对气流参数的依赖性。实验结果表明，随着烧蚀池中湍流的抑制，ICP-MS峰变得更尖锐，信号幅度增加。此外，还论证了采样率超过10 Hz的LA-ICP-MS分析的可能性。表达在新的烧蚀电池的深度剖析上的铝-锌多层结构和工业镁-锌涂层的例子证明。
In this paper a novel concept of ablation cell for laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is presented. Suppression of the turbulence in the flush gas flow in the ablation region reduces the wash-out time of the ablation cell considerably. An ablation chamber which enables ICP-MS pulse duration down to several ten milliseconds has been designed. Dependence of the ICP-MS peak amplitude, width, and shape on the gas flow parameters is studied experimentally for aerosol ablated under laminar and turbulent conditions. Experiments demonstrate that the ICP-MS peak becomes sharper and the amplitude of the signal grows as the turbulence in the ablation cell is suppressed. Furthermore, the possibility of the LA-ICP-MS analysis with a sampling rate of more than 10 Hz has been demonstrated. Express in-depth profiling in the new ablation cell is demonstrated on examples of an Al–Zn multilayer structure and an industrial Mg–Zn coating.