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Tritium analysis sample preparation system

A technology for sample preparation and vacuum system, applied in the field of tritium analysis, which can solve the problems of low level of water not suitable for analysis

Inactive Publication Date: 2021-07-06
INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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Problems solved by technology

In the past, the analytical sample preparation system of electrolytic concentration-liquid scintillation counting method was not suitable for the analysis of low levels of tritium in water

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Embodiment Construction

[0154]Electrolytic concentration-liquid scintillation counting is the most important technique for analyzing low levels of tritium in water. With the control of nuclear explosions, the tritium content of land circulating water gradually decreased, and the combined standard uncertainty of this method was reduced to less than 0.5TU, which has become a prerequisite for its continued application as a hydrological research method. Although theoretically, the analysis uncertainty can be reduced infinitely by prolonging the counting time of the sample (and the standard and background measured at the same time), but when the counting time exceeds 500min, the analytical uncertainty can be improved by prolonging the counting time Therefore, in practical applications, the cumulative counting time of samples is generally set at 400-600 minutes, and the further improvement of the analysis uncertainty is realized by increasing the enrichment factor and its reproducibility of the electrolytic...

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Abstract

The invention belongs to the technical field of tritium analysis, and particularly relates to a tritium analysis sample preparation system which comprises the following steps: distilling a collected water sample to remove salt; performing electrolytic concentration on the desalted water sample; neutalizing the concentrated electrolyte; putting the electrolytic tank filled with the electrolyte into a constant-temperature box for vacuum distillation; preparing and measuring a sample; performing calculation; and analyzing low-concentration tritium elements in underground water, wherein the accuracy and the precision are high.

Description

technical field [0001] The invention belongs to the technical field of tritium analysis, in particular to a sample preparation system for tritium analysis. Background technique [0002] The successful application of environmental isotope tritium in many fields, such as evaluating the age of shallow groundwater and studying the migration laws of underground and surface water, has made it an important method in the research of hydrology and hydrogeology. Electrolytic concentration-liquid scintillation counting method is The most important technical method for analyzing low-level tritium in water, and the tritium analysis sample preparation system is the key technology for testing tritium content. [0003] The half-life of tritium is only 12.32 years, so the content of tritium in natural water is generally not very high. Especially since the prohibition of nuclear tests in the atmosphere in 1964, the tritium concentration in natural water bodies has decreased year by year. For...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/40G01N27/26
CPCG01N1/40G01N27/26G01N2001/4038
Inventor 彭玉荣郭华良齐继祥
Owner INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI