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Method for detecting super trace radioactive background in polymer

A detection method and polymer technology, applied in the field of analytical chemistry, can solve problems such as span to pg/g, achieve simple method, reduce the possibility of reagent blank and other contamination, and use less acid.

Active Publication Date: 2018-08-17
SUN YAT SEN UNIV
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  • Application Information

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Problems solved by technology

However, the ICP-MS measurement method in the prior art still cannot meet the detection requirements for background events such as neutrino detector experiments, and the detection of radioactive elements still stays at ng / g. The detection level of elements spanning from ng / g to pg / g is a tricky one

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  • Method for detecting super trace radioactive background in polymer
  • Method for detecting super trace radioactive background in polymer
  • Method for detecting super trace radioactive background in polymer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] One of embodiment 1 pretreatment methods: dry ashing method

[0079] The dry ashing method is generally used to destroy the organic matter in the sample. In this method, the crucible is usually placed on the electric heating plate to decompose and carbonize, then transferred to the muffle furnace for ashing, and finally the residue is dissolved. It is widely used in food and environmental samples.

[0080] In this experiment, the dry ashing method was chosen to pre-treat the plexiglass sample, because the plexiglass is a polymer formed by the polymerization of organic monomers and contains a large amount of organic matrix; secondly, the elements U and Th studied in this experiment are both Elements that are difficult to volatilize will not be lost due to volatilization; moreover, this method can increase the sampling volume and reduce reagent pollution, so this method can be used in the research of this experiment. In this experiment, the dry ashing method was investig...

Embodiment 2

[0112] Embodiment 2 detection conditions

[0113] The optimized parameters of ICP-MS are shown in Table 2. The optimized parameters are more suitable for the detection site of the present invention and the precise determination of the target object after the pretreatment method is used. The detection accuracy can be further improved. The comparison of patterns in the detection conditions is schematically illustrated. For example, the spiked solution (C=61.35ppt) was measured three times by examining the two modes of STD and KED, and the obtained results are shown in Table 7.

[0114] Table 7. Comparison of accuracy and precision of U and Th detection in different detection modes

[0115]

[0116] For the detection of U and Th, the KED mode and specific detection conditions can achieve more outstanding results in terms of accuracy. Especially for the detection of U, the accuracy can reach a very rare 99.35%.

[0117] Elution Solvent Investigation

[0118] In the proces...

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Abstract

The invention belongs to the field of analytical chemistry, and relates to a method for detecting super trace radioactive background in a polymer. The analytic method for measuring the super trace radioactive background by ICP-MS is established in a dry ashing pretreatment manner in order to realize the analysis of super trace elements in organic glass. The detection limit of the detection methodcan reach 1 pg / g or below; and additionally, the method can be simply, rapidly and accurately operated.

Description

technical field [0001] The invention belongs to the field of analytical chemistry and relates to a detection method for measuring ultra-trace radioactive background in polymers. Background technique [0002] (1) Research background of radioactive background measurement [0003] As one of the most important disciplines in frontier scientific research, particle physics has attracted extensive attention from scientific researchers. Among them, neutrino research occupies an important position in international particle physics research. It is the only new physics beyond the standard model of particle physics with experimental evidence so far, providing sufficient evidence for understanding the microscopic material structure and the origin and evolution of the macroscopic universe. Therefore, neutrino research has become the research object of modern scientific researchers. Following the discovery of a new type of neutrino oscillation in China's Daya Bay neutrino experiment in 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N1/44
CPCG01N1/44G01N27/62
Inventor 刘洪涛
Owner SUN YAT SEN UNIV
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