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Method for determination of thorium content of thorium dioxide

A technology of thorium dioxide and a determination method, which is applied in the direction of material analysis by observing the influence on chemical indicators, preparation of test samples, and analysis by chemical reaction of materials, etc., can solve the problem of high cost and complicated operation process. and other problems to achieve high precision

Inactive Publication Date: 2016-07-27
CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high cost and complicated operation process of the existing thorium content determination method, and provide a low-cost, high repeatability and accurate detection method for the determination of thorium content in thorium dioxide

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  • Method for determination of thorium content of thorium dioxide
  • Method for determination of thorium content of thorium dioxide
  • Method for determination of thorium content of thorium dioxide

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 Shown, a kind of assay method of thorium content in thorium dioxide, specifically comprises the following steps:

[0027] The first step is to decompose the sample.

[0028] Step 1.1: Put the sample in a 50mL beaker, add 10mL of ρ(HNO3)=1.42g / mL high-grade pure nitric acid solution, 0.1mL of ρ(HF)=1.15g / mL high-grade pure hydrofluoric acid The solution is heated to 250°C on a temperature-adjusting electric heating plate until the sample is completely dissolved, then removed and cooled to room temperature. Use deionized water to transfer the sample to a 100mL volumetric flask, dilute to the mark with water, and mix well.

[0029] Step 1.2: Pipette 5.00 mL of the test solution obtained in Step 1.1 into a 300 mL Erlenmeyer flask, add 30 mL of water, adjust the pH of the solution to 1.6-2.0 with 2 mol / L ammonia water, and test wit...

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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 thorium content of thorium dioxide. The method solves the problem that the existing thorium content determination method has a high cost and a complex operation process. The method comprises test sample decomposition and thorium content calculation. The method utilizes an EDTA volumetric method to realize determination of thorium content of thorium dioxide, is suitable for determination of thorium content of thorium dioxide and is suitable for determination of thorium content of thorium nitrate. A trace amount of rare earth impurities do not influence precision determination of thorium content. The method has the characteristics of high precision, accuracy and reliability. The method has thorium content determination RSD% less than 0.2%.

Description

technical field [0001] The invention relates to the technical field of chemical detection methods, in particular to a method for measuring thorium content in thorium dioxide. Background technique [0002] Thorium dioxide can be used to produce nuclear reactor fuel elements, and the determination of thorium content is the most important technical parameter of the core element. Reported methods for the determination of thorium include ion chromatography, gravimetry, and complexometric titration. The advantages of ion chromatography are high detection limit and good precision, especially suitable for the detection of trace amounts of thorium. The disadvantage is that due to the dilution error, it is not suitable for the detection of high-content thorium. The chromatographic separation process is more complicated, so it is necessary to choose a suitable separation method, and the equipment is complex and expensive, which is difficult for many small laboratories. The advantage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N1/28G01N1/38
Inventor 唐威翟春迎
Owner CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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