Rapid Multi-Element Surface Imaging Analysis of Minerals Based on High-Speed Scanning Laser Induced-Breakdown Spectroscopy Instrument
10.19756/j.issn.0253-3820.241149
- VernacularTitle:基于高速扫描激光诱导击穿光谱仪的矿物表面多元素快速成像分析
- Author:
Yu RAO
1
;
Jian-Xiong DAI
;
Sha CHEN
;
Yan-Ting YANG
;
Qing-Wen FAN
;
Yi-Xiang DUAN
Author Information
1. 四川大学机械工程学院,成都 610065
- Keywords:
Laser-induced breakdown spectroscopy;
High-speed scanning;
Complex matrix;
Rapid elemental imaging
- From:
Chinese Journal of Analytical Chemistry
2024;52(10):1544-1552
- CountryChina
- Language:Chinese
-
Abstract:
Elemental imaging analysis based on laser induced-breakdown spectroscopy(LIBS)can provide significant reference value for oil and gas exploration activities.Improving the scanning speed and spatial resolution of LIBS elemental imaging analysis instruments contributes to enhancing the efficiency of mineral surface elemental analysis,which is crucial for achieving in-situ,real-time,and rapid LIBS analysis.In this study,a high-speed scanning LIBS elemental imaging analysis instrument was developed based on a scanning mirror device,achieving a scanning speed of 100 Hz and a spatial resolution of 50 μm.The stability of spectral data collected by this instrument was validated using aluminum alloy standard samples with uniform elemental distribution.The experimental results showed that the relative standard deviations(RSD)of the spectral data collected at different locations were 2.76％,2.79％,2.35％and 2.55％,respectively,demonstrating that the instrument's performance met analysis requirements.Analysis of spectral acquisition channels led to the selection of the 337-595 nm spectral range.Imaging analysis of major elements on the surface of meteorite mineral samples with complex matrices was conducted using this instrument,coupled with a multi-element imaging algorithm enabling visualization analysis of four major elements on the same image.The results revealed a higher level of detail and complexity in element distribution.The study demonstrated that this instrument,combined with multi-element imaging analysis algorithms,could provide crucial technical support for rapid imaging of element distribution in minerals at a microscopic scale during geological research.
