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Method for determination of phosphorus content of thorium dioxide

A technology of thorium dioxide and its determination method, which is applied in the direction of material analysis through observation of the influence on chemical indicators, preparation of test samples, analysis through chemical reaction of materials, etc., can solve the problem of inability to measure thorium dioxide phosphorus Content and other issues

Inactive Publication Date: 2016-07-27
CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing methods cannot measure the phosphorus content in thorium dioxide, and provide a low-cost, high-repeatability, accurate detection that can meet the needs of production and scientific research detection. Determination method

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  • Method for determination of phosphorus content of thorium dioxide

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Such as figure 1 Shown, a kind of assay method of phosphorus content in thorium dioxide, specifically comprises the steps:

[0021] In the first step, the sample is dissolved.

[0022] Weigh 0.1000g of thorium dioxide powder, accurate to 0.0001g, and place it in a 100mL beaker. Sequentially add 10mL density 1.42g / cm 3 For superior pure concentrated nitric acid, add 0.5mL of hydrofluoric acid solution with a volume ratio of hydrofluoric acid to water of 1:19, and heat at 100-150°C until the sample is completely dissolved.

[0023] The second step is extraction and separation.

[0024] Transfer the cooled sample to a 60mL separatory funnel, add 10mL of nitric acid solution with a volume ratio of nitric acid to water of 1:11, add 3g of superior pure anhydrous sodium sulfate, oscillate to dissolve, add 3.0 1 mL ammonium molybdate solution with a...

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Abstract

The invention relates to the technical field of chemical detection methods and concretely relates to a method for determination of phosphorus content of thorium dioxide. The method solves the problem that the existing method cannot determine phosphorus content of thorium dioxide. The method comprises test sample dissolution, extraction separation and phosphorus content determination. The method utilizes a spectrophotometry method to detect phosphorus in thorium dioxide powder and a thorium dioxide core block, realizes accurate determination of microscale phosphorus content of thorium dioxide powder under experiment conditions, solves the problems of determination of phosphorus in thorium dioxide powder and a thorium dioxide core block, provides accurate detection data and cooperates with scientific research and production.

Description

technical field [0001] The invention relates to the technical field of chemical detection methods, in particular to a method for determining phosphorus content in thorium dioxide. Background technique [0002] Thorium dioxide can be used to produce nuclear reactor fuel elements, and the determination of phosphorus content is the most important technical parameter of the core element. Thorium dioxide powder is mainly produced from thorium oxalate after high-temperature calcination and decomposition. The higher the calcination temperature, the harder it is to dissolve the thorium dioxide powder. At present, there is no chemical method to measure the content of thorium dioxide powder and pellets at home and abroad. Phosphorus specific methods. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the existing methods cannot measure the phosphorus content in thorium dioxide, and provide a low-cost, high-repeatability, accurate de...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N1/44
Inventor 王梅杨利春
Owner CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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