Spectrum detection system for material component analysis and detection method thereof

Abstract

The invention relates to the technical field of optical detection and provides a spectrum detection system for material component analysis and a detection method thereof. The spectrum detection system comprises a laser device, a spectrum signal collecting component, a light separating component and a material component analysis device with a door control function, wherein the laser device sequentially generates laser with at least two wavelengths and a synchronous signal; the spectrum signal collecting component collects an LIBS (laser-induced breakdown spectroscopy) signal and an RRS (retransmission request signal) spectrum signal which are generated after a sample to be analyzed is excited by two laser pulses respectively; the light separating component effectively separating the LIBS signal and the RRS spectrum signal with different wavelengths respectively; the material component analysis device with the door control function detects and receives the LIBS signal or the RRS spectrum signal separated by the light separating component according to the synchronous signal of the laser device and compares the existing spectrum information data to analyze the atom components and the molecule components of the sample so as to identify the components of the material. According to the invention, excitation, collection and detection of the LIBS signal and the RRS spectrum signal can be realized on one set of system by using single pulse laser, so that the atomic spectrum and the molecular spectrum of the material are obtained, and the components of the to-be-detected target containing various components or unknown components can be quantitatively analyzed.

Description

technical field [0001] The invention belongs to the technical field of optical detection, and in particular relates to a spectral detection system and detection method for material component analysis. Background technique [0002] Laser Induced Breakdown Spectroscopy (LIBS) is a commonly used atomic emission spectroscopy analysis technique. LIBS focuses laser pulses in a small focal area on the surface of samples in different states of matter (solid, liquid, and gas). When the energy density of the laser pulse is greater than the breakdown energy threshold of the sample to be tested, it will The sample is locally excited to generate plasma, that is, laser-induced plasma is generated. Due to the relatively high local energy density and temperature of this plasma, it can be used for sampling, atomization, excitation and ionization. Using a spectrometer to directly collect the emission line signals generated by the plasma on the surface of the sample can not only obtain the a...

AI Technical Summary

Problems solved by technology

However, both of these two techniques have limitations when it is required to analyze the molecules and elements that make up the substance at the same time, that is, the detection of the substance is not comprehensive enough.

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