Impulse melting mass spectrometry analysis method for element

Abstract

A pulse fusion mass spectrometry element analysis method belongs to the technical field of quantitative analysis of chemical components of materials. The steps are: pulse melting and degassing: under the protection of inert gas, the pulse furnace is used to heat and melt the sample, and the oxygen, nitrogen, hydrogen and argon gas elements in inorganic materials such as metals and ceramics are converted into gaseous components in a graphite crucible. Carbon monoxide and carbon dioxide, nitrogen, hydrogen and argon are released; purification treatment: the degassed product is carried out by the carrier gas and purified; mass spectrometry detection: the purified gas is introduced into the mass spectrometer, and the degassed product is ionized and focused into an ion beam , is accelerated by an electric field, separated according to the mass-to-charge ratio, and finally reaches the mass spectrometer to generate a series of electrical signals; after signal collection and data processing, the mass percentages of oxygen, nitrogen, hydrogen and argon elements in the tested sample are obtained. The advantage is that it can realize the simultaneous, fast, high sensitivity and high precision analysis of the above four elements. Sensitivity of 0.1ppm to 0.01ppm.

Description

technical field [0001] The invention belongs to the technical field of quantitative analysis of chemical components of materials, and in particular provides a pulse fusion mass spectrometry element analysis method. It is used to analyze the content of oxygen (O), nitrogen (N), hydrogen (H) and argon (Ar) in inorganic materials such as metals and ceramics. Background technique [0002] Elements such as oxygen, nitrogen, hydrogen, and argon are extremely important to material properties and are necessary indicators for material design, production, and application processes. [0003] Existing methods do not involve the analysis of argon. [0004] The current analysis of oxygen, nitrogen and hydrogen is that the sample is heated and melted in the graphite crucible of the pulse heating furnace, the oxygen reacts with the carbon in the graphite crucible to generate carbon monoxide and a small amount of carbon dioxide, and the nitrogen and hydrogen elements are released as nitroge...

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Problems solved by technology

[0005] The problems existing in the existing method are: 1) the trace amount of argon in the material cannot be determined; 2) the analysis process is very complicated, in order to avoid interference, complex gas conversion or removal methods are used, and the gas path is complicated; 3) the single-unit single-measurement element is the most 2 kinds, and they must be detected successively, and cannot be analyzed at the same time; 4) Except for some methods, the sensitivity of hydrogen analysis can reach 0.1ppm, and the minimum detection limit of other elements is 1ppm, which cannot meet the requirements of various new materials for elemental analysis at this stage. Require

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