A carbon fiber tube x-ray fluorescence sample cell

Abstract

The invention discloses a carbon fiber tube X-ray fluorescence sample cell. The carbon fiber tube X-ray fluorescence sample cell includes a sample cell body and a joint; the sample pool body is a carbon fiber tube; the joint consists of a sleeve, a sealing ring and a base Composed of three parts, the casing has internal threads, and the base has corresponding external threads. When the threads are matched and tightened, the sealing ring in the middle can be squeezed to achieve sealing. The carbon fiber tube X-ray fluorescence sample cell provided by the present invention has a small absorption of X-ray fluorescence, and no error will be introduced in the analysis of elements such as uranium, neptunium, and plutonium after post-processing. At the same time, the carbon fiber X-ray fluorescence sample cell is radiation-resistant Good photo performance, good acid resistance and organic corrosion resistance, strong mechanical properties, and excellent comprehensive properties.

Description

technical field [0001] The invention relates to the technical field of X-ray fluorescence analyzers, in particular to a carbon fiber tube X-ray fluorescence sample cell. Background technique [0002] X-ray fluorescence instrument is a commonly used analytical instrument in post-processing production and research. In a conventional X-ray fluorescence analyzer (XRF), in order to reduce the absorption of X-rays by materials, the materials used in the optical path of the light irradiating the sample and the detector receiving the X-ray fluorescence of the sample are organic materials composed of light elements such as mylar film or carbonized Inorganic materials such as boron and graphite crystals. [0003] The sample medium in the post-treatment is mainly high-concentration nitric acid or TBP / OK, so the sample cell material is required to have good acid resistance, organic corrosion resistance and radiation resistance. Most organic materials are easy to swell in an organic en...

AI Technical Summary

Problems solved by technology

Most organic materials are easy to swell in an organic environment, their mechanical properties are reduced after strong irradiation, and their radiation resistance is generally poor, so the application range in post-processing analysis is limited to a certain extent

Graphite crystals have good acid and radiation resistance, but the material is very fragile, difficult to machine, poor in mechanical strength, and has a certain risk of leakage during use

Boron carbide material has good sealing performance, but the material is brittle and fragile after being subjected to mechanical stress, and there is a risk of leakage

Moreover, trace strontium elements (about a few ppm) are generally contained in boron carbide materials sold in the market, and the K of strontium α1 The characteristic X-ray energy is 14.164keV, the L of Pu α1 The characteristic X-ray energy is 14.279keV, the difference between the two is 115eV, and the resolution of the energy dispersive X-ray fluorescence instrument is generally about 200eV. As a result, a certain error is introduced, which reduces the analysis precision and accuracy

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