Device and method for separating krypton and xenon in rock sample

Abstract

A disclosed device for separating krypton and xenon in a rock sample comprises a cylinder and an upper cover, the cylinder internally comprises a liquid nitrogen layer and a heat conduction agent layer, the liquid nitrogen layer sleeves the heat conduction agent layer, a cavity between the outer wall of the liquid nitrogen layer and the cylinder can be vacuumized, and an inner cavity of the liquid nitrogen layer can accommodate liquid nitrogen; a cold finger is arranged in an inner cavity of the heat conduction agent layer, a heat conduction agent can be contained between the inner wall of the heat conduction agent layer and the cold finger, the cold finger is connected with a heating element, a temperature measuring element and an experiment cavity, an inner cavity of the cold finger is communicated with the experiment cavity, and the experiment cavity can be communicated with external mixed gas. The invention further provides a method for separating krypton and xenon in the rock sample, the method is used in the pretreatment process of mass spectrometry of inert gas samples, operation is easy and convenient, rare gas can be separated in a high-quality and high-efficiency mode, the experiment time is shortened, the background is reduced, and meanwhile the purity of the rare gas is improved.

Description

technical field [0001] The invention relates to the technical field of geological sample analysis, in particular to a device and method for separating krypton and xenon in rock samples. Background technique [0002] Noble gases have low element abundance and chemical inactivity in the earth and terrestrial planets. During the evolution of geological history, its composition and isotopes are not easily affected by complex chemical reactions and biological activities, but only depend on physical processes such as mixing, diffusion, dissolution, adsorption and nuclear reactions. Therefore, rare gas elements (ie, helium He, neon Ne, argon Ar, krypton Kr, and xenon Xe) are widely used in the research of material source and geochemical process tracing and isotope dating in the field of earth science. [0003] Noble gases have been widely used in the field of geochemical research. For example, Kr is mainly used in groundwater dating, the cosmic exposure age of meteorites, tracing ...

AI Technical Summary

Problems solved by technology

[0010] The commercial device used above needs to use high-purity helium and other refrigerants to cool down through volume compression, which takes a lot of time, and due to the existence of some resid

Images