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Radioactive organic matter pretreatment method

An organic and radioactive technology, applied in the field of radioactive organic pretreatment, can solve the problems of long digestion time, high blank value, destroying organic samples, etc., and achieve the effect of short time, good digestion effect and less reagent consumption.

Pending Publication Date: 2019-09-06
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Abstract
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Problems solved by technology

During the ashing process of high temperature ashing method, it is easy to cause the volatilization loss of the elements to be measured
The wet digestion method mainly uses the oxidation of strong oxidizing acid or strong oxidant to destroy the organic sample, and there is also the volatilization loss of the elements to be measured, the digestion time is long, and a large amount of reagents need to be added, resulting in a high blank value

Method used

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  • Radioactive organic matter pretreatment method

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as figure 1 As shown, the present invention provides a kind of radioactive organic matter pretreatment method, comprises the steps:

[0022] (1) Sampling: according to the content of impurity elements in the organic phase, pipette a certain amount of organic phase into the microwave digestion tank;

[0023] (2) Add acid: add 5-10mL concentrated nitric acid and 1-3mL concentrated hydrofluoric acid into the microwave digestion tank;

[0024] (3) Preheating: place the microwave digestion tank on the electric heating plate, heat at 80-120°C for 10-30min, and drive away the gas generated by part of the reaction;

[0025] (4) Microwave digestion: Put the microwave digestion tank into the microwave digestion instrument, cover it, and close the door and window of the microwave digestion instrument. Set the microwave digestion program, ...

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Abstract

The invention provides a radioactive organic matter pretreatment method. The method comprises the steps of sampling, acid adding, preheating, microwave digesting, acid catching, and volume metering; transferring a certain amount of uranium-containing organic matter to a microwave digestion tank, heating for a certain time in an electric heating plate, placing in a microwave digester, setting a microwave digestion program, and placing in an acid catcher to heat after the microwave digestion is ended, evaporating to the required volume. The method can be used for the pretreatment of the radioactive organic matter, the aqueous phase can be directly obtained through organic phase microwave digestion, the solution obtained after microwave digestion is clear and can directly enter an inductivelycoupled plasma spectrometer or mass spectrometer to determine. The technical scheme provided by the invention is simple in operation, time-saving, and good in treatment effect.

Description

technical field [0001] The invention belongs to the technical field of element analysis in the organic phase of uranium mining, smelting, uranium extraction and uranium purification, and in particular relates to a pretreatment method for radioactive organic matter. Background technique [0002] In the process of uranium mining and metallurgy in my country, the uranium in the leaching solution is extracted by TBP / P204; in the process of uranium purification, the uranium in the qualified liquid is extracted by TBP / kerosene, whether it is the uranium extraction process or the uranium purification process , it is necessary to analyze and measure the impurity elements in the organic phase so as not to affect the quality of subsequent products. These impurity elements mainly include W, Ti, V, Fe, Mn, Mo, Zr, Cr, Cd and other metal elements. At present, for the analysis of these elements, inductively coupled plasma emission spectrometry and inductively coupled plasma mass spectromet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/44G01N1/28
CPCG01N1/28G01N1/44
Inventor 郭国龙王春叶丁红芳杨丹丹孙雪云龚明明曹淑琴李梁
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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