Method for analyzing niobium and titanium in radioactive organic phase

An analytical method and radioactive technology, applied in the field of analytical chemistry, can solve the problems of volatilization loss of the element to be tested, affecting the accuracy of the results, long digestion time, etc., achieving the effect of less reagent consumption, simple sample pretreatment, and good digestion effect.

Pending Publication Date: 2021-02-02
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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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. There are problems such as volatilization loss of the elements to be measured, long digestion time, and the need to add a large amount of reagents, resulting in high blank value, which affects the accuracy of the results.

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  • Method for analyzing niobium and titanium in radioactive organic phase
  • Method for analyzing niobium and titanium in radioactive organic phase
  • Method for analyzing niobium and titanium in radioactive organic phase

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Embodiment 1

[0057] (1) Instrument parameters in the present invention are: radio frequency power 1300W; Plasma gas flow rate 15L / min; Auxiliary gas flow rate, 0.2L / min; Atomizer flow rate 0.8L / min; Rinse time 1.5min; Pump speed 2.5mL / min min; observation height 15mm; repeat times 2 times.

[0058] (2) Determination of microwave digestion agent: the dosage of nitric acid is 5-10mL; the dosage of hydrofluoric acid is 0.1-2.0mL; the dosage of tartaric acid is 0.1-0.3mL, and other conditions remain unchanged. Such as Figure 1-3 As shown, through the determination of niobium and titanium, the optimal dosage of digesting agent is obtained: the dosage of nitric acid is 8mL, the dosage of hydrofluoric acid is 1mL; the dosage of tartaric acid is 0.2mL.

[0059] (3) if Figure 4 As shown, the microwave digestion program is determined: put the microwave digestion tank into the microwave digestion apparatus, cover the lid, and close the doors and windows of the digestion apparatus. Set the microwav...

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Abstract

The invention provides a method for analyzing niobium and titanium in a radioactive organic phase. The method comprises the following steps: digesting a to-be-measured organic phase by using nitric acid, hydrofluoric acid and tartaric acid through a microwave digester, removing acid, transferring, fixing the volume to a certain volume to prepare a to-be-measured solution, and directly measuring inan inductively coupled plasma spectrometer. The method can solve the problems that the content of easily hydrolyzed elements in radioactive organic matters is difficult to measure, the adding standard recovery rate is low and the like, improves the stability of analysis results, and is simple in sample pretreatment and accurate in analysis results.

Description

technical field [0001] The invention relates to the content analysis of metal elements in the organic phase of the uranium mining and smelting uranium extraction process, belongs to the field of analytical chemistry, and specifically relates to an analysis method for niobium and titanium in the radioactive organic phase. Background technique [0002] In the process of extracting uranium from a uranium-niobium ore in Huayangchuan in my country, the uranium in the leaching solution is extracted by TBP / P204, and the impurity elements in the organic phase need to be analyzed and measured so as not to affect the quality of subsequent uranium products. The impurity elements are mainly characteristic metal elements such as niobium and titanium. In terms of testing, spectrophotometry, AAS and inductively coupled plasma emission spectrometry are generally used. Whereas both spectrophotometry and AAS can only measure a single element, inductively coupled plasma emission spectrometry h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/44G01N21/25
CPCG01N1/28G01N1/44G01N21/25
Inventor 郭国龙卢阳王春叶龚明明孙雪云李梁程晨杜凯华应长帅
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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