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Method for determining zirconium and impurity contents in uranium-zirconium alloy

A technology of impurity content and determination method, applied in the field of chemical detection

Active Publication Date: 2017-04-26
CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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Problems solved by technology

[0003] The main components of uranium-zirconium alloy are uranium and zirconium, and other chemical components are Al, Fe, Cu, Ni, Cr, Mo, Co, Mn, Ti, Ca, Pb, Cd, Si, V, Hf, Sn, W, There are 21 kinds of B, Nb, Li, and Y. At present, there is no public method for the determination of zirconium and 21 impurity elements in uranium-zirconium alloys by using inductively coupled plasma emission spectroscopic analysis technology at home and abroad.

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  • Method for determining zirconium and impurity contents in uranium-zirconium alloy
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  • Method for determining zirconium and impurity contents in uranium-zirconium alloy

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[0054] The technical solutions of the present invention will be described in detail below in conjunction with specific embodiments.

[0055] 1. a method for assaying zirconium and impurity content in uranium-zirconium alloy, is characterized in that, comprises the following steps:

[0056] (1) Determination of zirconium content

[0057] (1.1) Sample dissolution

[0058] (1.1.1) Weighing the sample: Accurately weigh 0.1g of the sample, accurate to 0.0001g, and place it in a 100mL quartz beaker;

[0059] (1.1.2) Preparation of mixed acid solution: the mixed solution of concentrated nitric acid and hydrochloric acid prepared in a ratio of 1: 3 by volume is used as mixed acid solution;

[0060] (1.1.3) Heat the mixed acid solution and the sample at a ratio of 5:1ml / 0.1g at 200°C to 230°C until the uranium dissolves;

[0061] (1.1.4) Add hydrofluoric acid with a ratio of 0.05:1ml / 0.1g to the sample, and continue heating until the zirconium is completely dissolved;

[0062] (1.1...

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Abstract

The invention belongs to the establishment of a novel chemical test method, and particularly relates to a specific method for determining zirconium and impurity contents in uranium-zirconium alloy by inductively coupled plasma emission spectrometry. The invention establishes the test method for determining impurity elements and zirconium in uranium-zirconium alloy by plasma emission spectrometry. A sample is dissolved by nitric acid-hydrochloric acid mixed acid and hydrofluoric acid, matrix interference is eliminated by a matrix matching method and a multispectral fitting correction method, and a plasma emission spectrometer is used for detecting the contents of elements to be detected. The method is accurate and reliable, and meets the index requirement of the analysis technique of the project.

Description

technical field [0001] The invention belongs to the technical field of chemical detection methods, and in particular relates to a specific method for measuring the contents of zirconium and impurities in uranium-zirconium alloys by inductively coupled plasma emission spectrometry. Background technique [0002] There are relatively few detection methods for uranium-zirconium alloys at home and abroad, and most of them are mainly acid-soluble methods. Due to the insoluble characteristics of zirconium alloys, the addition of an appropriate amount of hydrofluoric acid can dissolve the sample well, and the addition of hydrofluoric acid will affect the The determination of some impurity elements will be affected; if the hydrofluoric acid is removed, the element zirconium will be easily hydrolyzed, and some impurity elements will be co-precipitated and lost during hydrolysis. Therefore, the dissolution of the sample and the elimination of the interference of the component element z...

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Application Information

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IPC IPC(8): G01N21/73G01N1/38
CPCG01N1/38G01N21/73
Inventor 董世哲马妍琳赵竹霞
Owner CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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