Time-resolved laser-induced breakdown spectral quantitative method

Abstract

The invention relates to a time-resolved laser-induced breakdown spectral quantitative method, which comprises the steps of: acquisition of spectrums and components of measured objects, wherein the acquisition is implemented by acquiring time-resolved laser-induced breakdown spectrums of the plurality of measured objects, and acquiring target component content of the corresponding measured objects; division of a calibration set and a verification set, wherein the division is implemented by ranking the plurality of measured objects according to target component concentration gradients, dividingthe calibration set and the verification set in a manner of taking 1 at an interval of m, and recording spectral matrixes and target component matrixes of the calibration set and the verification setrespectively; multi-dimensional partial least square analysis, wherein the multi-dimensional partial least square analysis is implemented by further decomposing the spectral matrix and the target component matrix of the calibration set, and carrying out linear regression on a spectral score matrix and a component score matrix, wherein the explanatory ability of the spectral score matrix to the component score matrix is maximum; and verification set prediction, wherein the verification set prediction is implemented by predicting a target component of the verification set according to the spectral score matrix of the verification set, a regression coefficient matrix of the calibration set and a component load matrix of the calibration set.

Description

technical field [0001] The invention relates to a quantitative method of laser-induced breakdown spectrum, in particular to a time-resolved quantitative method of laser-induced breakdown spectrum based on multidimensional partial least squares. Background technique [0002] Laser-induced breakdown spectroscopy (LIBS) is an atomic emission spectroscopy technique, which has been widely used in steel manufacturing, space development, environmental protection and other fields in recent years because of its multi-component simultaneous analysis and high sensitivity. . Laser-induced breakdown spectroscopy technology uses a pulsed laser to excite the surface of an object to generate a transient plasma with the characteristics of the object's elements, and a spectrometer is used to collect the spectral wavelength and intensity signals emitted within a specific time. Based on the different energy released by the transition of different elements during the de-excitation process of ex...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a time-resolved laser-induced breakdown spectrum quantitative method based on multidimensional partial least squares to improve the laser-induced breakdown spectrum quantitative analysis problem in the prior art. Quantitative Analysis Precision

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