论文部分内容阅读
本文概述在研制JVG型激光显微光谱仪中为提高其空间分辨率及检测极限所采取的技术措施,最后简介应用JVG型激光微区光谱仪拍摄到62黄铜样品上熔穴直径为ф10微米的铜、锌及一些杂质元素谱线的实验结果。一、概述以激光作为光谱分析的激发源和其它激发方法相比具有的显著特点是有很高的空间分辨率。根据Laqua报导,激光显微光谱分析的空间分辨率为:最小熔穴直径:10～25微米(和样品有关);熔穴深度:≥3微米(变化范围很大,和工作条件有关)。 Treytl等人认为,激光显微光谱分析的检测极限在采样量10~(-3)克、熔穴直径10～200微米的条件下为10~(-12)～10~(-15)克。Klockenkamper和Laqua认为:用辅助电极进一步激发的激光显微光谱分析的
This article summarizes the technical measures taken to develop the JVG laser micro-spectrometer in order to improve its spatial resolution and detection limit. Finally, the JVG-based laser micro-spectrometer is used to record 62 brass samples with a diameter of 10 micrometers , Zinc and some impurity elements of the experimental results. First, an overview of the laser as a source of excitation spectrum analysis and excitation methods compared with the salient features is the high spatial resolution. According to Laqua, the spatial resolution of laser microdissection analysis is: Minimum weld diameter: 10-25 μm (related to the sample); Depth of weld: ≥3 μm (varies widely depending on operating conditions). According to Treytl et al., The detection limit of laser micro-spectroscopy is 10 ~ (-12) ~ 10 ~ (-15) g under the condition of 10 ~ (-3) g sample volume and 10 ~ 200 μm diameter melting point. Klockenkamper and Laqua argue that laser assisted micro-spectroscopy