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Element content measuring method based on resonance and non-resonance double lines

An element content, non-resonant technology, applied in the direction of material excitation analysis, thermal excitation analysis, etc., can solve the problems of poor detection accuracy and narrow range of element linear calibration curves, and achieve small measurement errors, avoid self-absorption effects, and high linearity degree of effect

Active Publication Date: 2019-05-24
SHANXI UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of poor detection accuracy and narrow range of element linear calibration curves caused by the self-absorption effect of spectral lines in the application of LIBS technology in quantitative analysis. Absorption immune LIBS technology

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  • Element content measuring method based on resonance and non-resonance double lines
  • Element content measuring method based on resonance and non-resonance double lines
  • Element content measuring method based on resonance and non-resonance double lines

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Embodiment Construction

[0019] In this embodiment, the tablet sample obtained by mixing and pressing KBr and CuO powders is taken as an example, and the Cu element (with a content range of 0.01-60wt%) is quantitatively analyzed therein. Of course, it can also be used to measure other mixed elements. A self-absorption immune LIBS technology based on resonance and non-resonance doublets of the present invention is further described in conjunction with the accompanying drawings, which specifically includes the following steps:

[0020] (1) Select Cu element as the element to be measured, the spectral line with a wavelength of 324.75nm is used as the first spectral line of the resonant doublet, the spectral line with a wavelength of 327.40nm is used as the second spectral line of the resonant doublet, and the wavelength is The spectral line at 515.32nm is used as the first spectral line of the non-resonant doublet, and the spectral line with a wavelength of 521.82nm is used as the second spectral line of ...

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Abstract

The invention belongs to the technical field of laser spectral analysis and detection methods and particularly relates to self-absorption immune laser-induced breakdown spectroscopy. An element content measuring method based on resonance and non-resonance double lines has the advantages that a plasma optically thin time window is determined by comparing the double line strength ratio of a to-be-measured element and the theoretical strength ratio, and the resonance line and the non-resonance line are used to expand the measurable range of an element linear calibration curve; due to the fact that the optically thin spectral lines can be directly captured, self-absorption influence is avoided effectively by selecting the resonance and non-resonance double lines, the high-linearity calibrationcurve is obtained, and the method is small in measuring errors and wide in element linear calibration curve range.

Description

technical field [0001] The invention belongs to the technical field of laser spectrum analysis and detection methods, in particular to a self-absorption immune laser-induced breakdown spectrum technology based on resonance and non-resonance double lines. Background technique [0002] Laser-induced breakdown spectroscopy (LIBS) is a spectrochemical analysis technique based on emission spectra. It analyzes the composition and content information of samples by measuring the radiation spectrum of laser-induced plasma. It has been widely used in industry, environment, biology, medicine, etc. field. However, in LIBS quantitative analysis, the self-absorption effect will not only reduce the spectral line intensity and increase the spectral line width, but also saturate the calibration results, thus affecting the final quantitative analysis results. [0003] There have been a lot of research reports on reducing the influence of the self-absorption effect, and the methods proposed a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71
Inventor 侯佳佳张雷尹王保肖连团贾锁堂
Owner SHANXI UNIV
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