Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for calibrating spectral line self-absorption effect in laser-induced breakdown spectrometry

A laser-induced breakdown and self-absorption effect technology, applied in thermal excitation analysis, material excitation analysis, material analysis through optical means, etc., can solve the problem of spectral line self-absorption effect in laser-induced breakdown spectroscopy affecting quantitative analysis results, etc. problem, to achieve the effect of direct and simple correction

Inactive Publication Date: 2017-05-31
SHANXI UNIV
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem that the self-absorption effect of the spectral line in the laser-induced breakdown spectrum affects the quantitative analysis results, and provides a method for correcting the self-absorption effect of the spectral line in the laser-induced breakdown spectrum

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for calibrating spectral line self-absorption effect in laser-induced breakdown spectrometry
  • Method for calibrating spectral line self-absorption effect in laser-induced breakdown spectrometry
  • Method for calibrating spectral line self-absorption effect in laser-induced breakdown spectrometry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Such as figure 1 As shown, the laser-induced breakdown spectroscopy measurement device used in this embodiment includes a Nd:YAG pulsed laser 1, a light concentrating system 2, a fluorescence collection system 4, a grating spectrometer 5 and an ICCD 6, and the 532nm high-energy narrow pulse emitted by the pulsed laser 1 Focusing on the surface of the sample 3 through the concentrating system 2 to generate plasma, the plasma fluorescence is collected by the fluorescence collection system 4 and then transmitted to the grating spectrometer 5, the grating spectrometer 5 splits the plasma fluorescence according to the wavelength and projects it to the ICCD 6 for photoelectricity Corresponding spectral data are obtained after conversion and analog-to-digital conversion. Among them, the external trigger signal of ICCD 6 is given by pulse laser 1 .

[0026] In this embodiment, an aluminum alloy sample is taken as an example to correct the self-absorption effect of the Al atomi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of laser spectroscopy analysis and detection methods, and concretely relates to a method for calibrating a spectral line self-absorption effect in laser-induced breakdown spectrometry. The method is mainly characterized by acquiring a self-absorption coefficient of a spectral line to be analyzed through plasma electron density and line width of the spectral line to be analyzed measured based on a trace element spectrum line so as to calibrate the spectral line self-absorption effect. The method comprises the concrete steps of (1) selecting a trace element spectrum line under the same measurement condition as an optically thin reference line not affected by the self-absorption effect; (2) calculating corresponding plasma electron density through line width of the selected reference line; (3) calculating the self-absorption coefficient of the spectral line to be analyzed through the electron density and the line width of the spectral line to be analyzed, and evaluating a self-absorption degree; (4) calibrating peak intensity and integral intensity of the spectral line to be analyzed through the self-absorption coefficient. By utilizing the method, the plasma spectral line intensity can be conveniently calibrated, the accuracy of spectral data is improved, and quantitative analysis of material compositions is further carried out accurately.

Description

technical field [0001] The invention belongs to the technical field of laser spectrum analysis and detection methods, in particular to a method for correcting the self-absorption effect of spectral lines in laser-induced breakdown spectra. Background technique [0002] Laser-induced breakdown spectroscopy (LIBS) determines the type and content of elements in the sample by measuring the wavelength and intensity of the emission lines in the laser-induced plasma, and realizes qualitative and quantitative analysis of unknown samples. However, when the content of the element to be measured in the sample is high, the emission line of the element is prone to self-absorption, and the self-absorption effect will lead to a decrease in the intensity of the corresponding line and an increase in the width of the line, so that the line intensity and the element The linear relationship between the contents is destroyed, and the accuracy of quantitative analysis is greatly reduced. [0003...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71
CPCG01N21/718
Inventor 侯佳佳张雷尹王保肖连团贾锁堂
Owner SHANXI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com