Spectroscopy-mass spectrometry combined quantitative analysis device for elements in unknown sample

Abstract

The invention discloses a spectroscopy-mass spectrometry combined quantitative analysis device for elements in an unknown sample. The device uses a quantitative analysis structure and a method by using a laser-induced breakdown spectroscopy combining with a second level extraction field time-of-flight mass spectrometry (TOF). The quantitative analysis device with high detection sensitivity, real time, quickness, high accuracy, no contact, capability of simultaneously detecting multiple elements, and no need of pretreating the sample is realized. Due to dual-wavelength laser in the device, photofragments and molecular clusters are re-ionized conveniently, the mass spectrometry signal stability is improved, and a laser plasma emission spectroscopy signal is improved; due to a second level extraction field in the device, the TOF resolution ratio is improved conveniently and the signal is optimized conveniently; due to a spectroscopy collection system in the device, the capability of collecting plasma emission light to couple to optical fiber can be improved, an optical path can be folded, the integration and the miniaturization of an instrument are facilitated, and the commercialization of the instrument is realized conveniently.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a quantitative analysis device for elements in unknown samples combining spectrum and mass spectrometry. Background technique [0002] In 1960, American scientist Maiman invented the first ruby ​​laser, and then scientists invented the method of laser plasma generation. In 1962, in the 10th International Symposium on Spectroscopy, Fred Brech first proposed the use of ruby ​​maser to induce The spectrochemical method of plasmas, which is also the predecessor of laser-induced breakdown spectroscopy. In 1963, scientists had begun to use laser ablation plasma to analyze the surface of materials. However, due to the limitations of laser and spectral acquisition systems at that time, it was difficult to collect spectral signals and the quality was poor. Scientists once lost interest in this method. However, with the development of laser technology, the generation of high-power pulse...

AI Technical Summary

Problems solved by technology

Emission spectroscopy can effectively analyze the information of excited and ionized particles, but it cannot detect nanoparticles, molecular clusters, and dark state species produced by laser ablation materials, which will increase the error of LIBS quantitative analysis

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