Sample inlet device of laser ablation plasma mass spectrum

Abstract

The invention discloses a sample inlet device of a laser ablation plasma mass spectrum. The sample inlet device comprises an outer room and a sample holder, wherein one end of the outer room is closed; the outer room is in long straight form; the top plate of the outer room is provided with an outer room observation opening; the side surface of the outer room is provided with two carrier gas inlets; the sample inlet device also comprises a small inner room which is a hollow column, positioned in the outer room and hung below the observation opening of the outer room in an back-off mode; the upper end of the small inner room is provided with an inner room observation opening; a transparent material covers on the inner room observation opening; the side surface of the small inner room is provided with an air outlet which is led out through the outer room; the sampler holder is installed at the bottom of the outer room and not contacted with the small inner room; and positioning marbles are installed between the front and rear side surfaces of the sample holder and the front and rear inner walls of the outer room. The device reduces the influence on the carrier gas supply due to frequent sample bin cover opening caused by replacing the samples, and enables the plasma mass spectrum analytical signal to be more stable, and analytical result with higher degree of accurancy and better precision can be obtained.

Description

technical field [0001] The present invention is applied to the application research (including LA-Q-ICPMS and LA-MC-ICPMS) of laser ablation plasma mass spectrometry analysis (including LA-Q-ICPMS and LA-MC-ICPMS) in the existing mainstream laser ablation system, such as zircon dating, single mineral primary trace and Direct analysis of isotopes, minerals in thin slices, archaeological samples, glass samples, etc., specifically a sample introduction device, especially a sample introduction device for laser ablation plasma mass spectrometry. Background technique [0002] Laser ablation technology is an in-situ micro-area sampling technology that can realize micron area analysis. It can be used in conjunction with plasma mass spectrometry to analyze the composition of major trace elements and isotopes of samples. In recent years, this technology has been widely used in earth science, material science, life science, chemistry and other fields. [0003] Laser ablation technolog...

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Problems solved by technology

[0006] In view of the defects and deficiencies in the prior art above, the object of the present invention is to provide a sample introduction device for laser ablation plasma mass spectrometry, which overcomes the small volume of the sample chamber of the sample introduction device in the prior art, which causes a one-time The number of loaded sample targets is small and the defects of different fractionation effects are easy to occur, so that the number of samples loaded at a time reaches 15, and the introduction of a small inner chamber makes the analytical fractionation effects of samples and standards exactly the same, improving the accuracy of analysis results Spend

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