Laser-induced breakdown spectroscopy analysis method and implementation device based on single-light beam splitting

Abstract

The invention discloses a laser-induced breakdown spectroscopy analysis method and implementation device based on single-light beam splitting. The implementation device comprises a laser source, a laser beam splitting device, a straight optical transmission device, a bypass optical transmission device, an optical fiber detector, an optical spectrometer and a data analyzer, which are correspondingly connected through optical paths, wherein the laser beam splitting device is used for splitting a laser beam emitted from the laser source into two laser beams; one laser beam is vertically incident onto the surface of a sample after being focused by the straight optical transmission device, and the other laser beam is incident onto the surface of the sample by focusing after the laser incident angle is adjusted through the bypass optical transmission device to be an angle coincident with an action point of the vertical incident laser on the surface of the sample; the two laser beams stimulate the sample to generate plasmas; the optical fiber detector for collecting the plasmas is connected with the optical spectrometer through an optical fiber; a plasma emission spectrum is coupled into the optical spectrometer; the optical spectrometer is used for transmitting the collected spectrum data to the data analyzer through a USB (Universal Serial Bus) data wire; and the data analyzer is used for detecting and analyzing sample components to obtain sample component information.

Description

technical field [0001] The invention belongs to the technical field of spectral analysis, and relates to a laser spectral analysis technology, in particular to a laser-induced breakdown spectral analysis technology based on a single-beam splitting technology to generate double beams, and in particular to a dual-beam laser-induced breakdown spectral analysis method and means for its implementation. Background technique [0002] Laser Induced Breakdown Spectroscopy (LIBS) technology is a new type of atomic emission spectrometry technology, which relies on fast detection speed, simultaneous determination of multiple components, on-site in-situ analysis capability and no complicated sample pretreatment And other advantages, it is widely used in many fields such as oil and gas exploration, geological exploration, metallurgy, electric power and environmental monitoring. However, in recent years, its low sensitivity and high detection limit have become the bottleneck restricting t...

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Problems solved by technology

[0007] In view of the current situation and existing problems of the above-mentioned existing LIBS signal enhancement technology, the purpose of the present invention is to provide a new laser-induced breakdown spectroscopy analysis method and its implementation device, to overcome the existing LIBS by enriching the way of LIBS signal enhancement. The implementation device structure of the signal enhancement technology is complicated, and the device cost is high.

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