Method for indirectly measuring content of uranium in soil through atomic fluorescence spectroscopy

An atomic fluorescence spectrometry and content technology, which is applied in the field of indirect determination of uranium content in soil by atomic fluorescence spectrometry, can solve the problems of interference, inability to directly determine element uranium, and expensive inductively coupled plasma mass spectrometry instruments.

Inactive Publication Date: 2014-07-30
GUANGXI UNIV
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Problems solved by technology

Laser fluorescence method is easy to operate, with low detection limit and high sensitivity, but it is easily interfered by other elements, causing system errors
Inductively Coupled Plasma Mass Spectrometry Instruments Are Too E

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  • Method for indirectly measuring content of uranium in soil through atomic fluorescence spectroscopy

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with specific implementation.

[0028] A method for indirect determination of uranium content in soil by atomic fluorescence spectrometry. The grades of reagents and chemicals used in the method are all analytical pure. The operation steps are as follows:

[0029] 1. Soil pretreatment

[0030] Method 1 wet digestion

[0031] Weigh 1g of soil, accurate to 0.0001g, place it in a 100mL beaker, add HNO with a mass percentage concentration of 58% 3 : 10 mL of a solution of HCl=3:1 with a concentration of 36.5% by mass, and left to stand overnight. Slowly heat until white smoke is emitted, then add 5mL of hydrochloric acid with a concentration of 36.5% by mass, mix well and heat until the remaining solution is 2-3mL, filter while hot, transfer the filtrate into a 25mL volumetric flask after cooling slightly, and dilute with water to scale, and mix well to obtain a digested soil sample solution. Do blank ...

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Abstract

The invention discloses a method for indirectly measuring the content of uranium in soil through atomic fluorescence spectroscopy. The method is characterized in that the content of uranium is indirectly measured by measuring the content of arsenic; a complex is generated by utilizing uranium and certain arsenic-containing compounds which comprise but are not limited to arsenazo, and is separated from an original compound through a mode such as extraction, and the enriched complex subjected to separation is measured; and a standard working curve is made under the same condition and is compared so as to obtain the content of uranium by calculation. The method has the advantages that the method for indirectly measuring the content of uranium in soil through the atomic fluorescence spectroscopy is suitable for matrixes such as soil, water, coal and minerals. The method is simple and feasible, and compared with a conventional national standard method, the method according to the invention has the advantages that the used instrument is more common and is more applicable to analysis and research in a small lab.

Description

technical field [0001] The invention belongs to the technical field of measuring methods for uranium content, in particular to a method for indirectly measuring uranium content in soil by atomic fluorescence spectrometry. Background technique [0002] As a radioactive element, uranium is an important strategic resource and energy source, which widely exists in natural environments such as rocks and seawater. The isotopes and their rays produced during the fission of uranium are widely used in the fields of industrial and agricultural production and science and technology. For example, in industry, rays are used to realize automatic control of production, non-damage inspection, etc.; in agriculture, rays are used to cultivate fine seeds, prevent pests and diseases, etc.; in medicine, they are used for sterilization, clinical diagnosis and treatment; in geological exploration, they are used Find ore and so on. However, uranium poses a threat to the environment and organisms ...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 陆健平卢秀芳倪湖权
Owner GUANGXI UNIV
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