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Extraction and separation method of trace uranium element in liquid sample

A liquid sample and separation method technology, applied in the field of trace analysis sample pretreatment, can solve the problems of affecting the sensitivity of the analysis method, low recovery rate of target uranium element, affecting the efficiency of extraction, etc., and achieve the best extraction and separation effect and high recovery rate. , the effect of improving stability and reliability

Active Publication Date: 2018-03-30
中国人民解放军陆军防化学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology improves on existing methods for extracting small amounts of uranum from liquids without causing contaminants like arsenite. It involves mixing two types of materials - Diphryltoluene sulfonic acid ("DTL")) and triphenyleneglycerol acetone triglate ("TGTA"), which are used together as an adsorbent during solid phase extractions. By adjusting these ratios between different chemical substances, we aimed towards increasing their efficacy while reducing environmental concerns associated therewith. Overall this innovation provides technical benefits over current techniques including solvent extraction, but also enhance certain aspects related to analysis accuracy and sensitivity.

Problems solved by technology

This patented describes two ways to separate uranum from other metals like iron or manganese by selectively removing unwanted substances called URNAs that can be harmful if they were mixed into drinking water supplies. Current techniques involve collecting samples containing both uranes and impure elements beforehand, which may lead to poor results due to contaminated materials being added later on.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) dissolving dipentyl pentyl phosphate and trioctyl phosphine oxide in n-hexane to prepare a n-hexane solution in which the concentration of dipentyl phosphate is 0.15mol / L and the concentration of TOPO is 0.15mol / L;

[0023] (2) Under stirring, add the n-hexane solution prepared in 30mL step (1) dropwise in 30g polytetrafluoroethylene powder, then place it in a fume hood and stir for 1h, the n-hexane volatilizes completely and is loose; With 15 mL of HNO with a concentration of 0.2 mol / L 3 After the aqueous solution I was adjusted to a slurry state, the column was wet-packed and both ends of the chromatography column were filled with polytetrafluoroethylene filaments, and the chromatography column was balanced with 20 mL of nitric acid aqueous solution II with a concentration of 2.0 mol / L, and the concentration of nitric acid aqueous solution II was controlled. The flow rate is 2.0mL / min;

[0024] Wherein, the material of the chromatographic column used is glass, th...

Embodiment 2

[0029] (1) dissolving dipentyl pentyl phosphate and trioctyl phosphine oxide in n-hexane to prepare a n-hexane solution in which the concentration of dipentyl phosphate is 0.15mol / L and the concentration of TOPO is 0.15mol / L;

[0030] (2) Under stirring, add the n-hexane solution prepared in 30mL step (1) dropwise in 30g polytetrafluoroethylene powder, then place it in a fume hood and stir for 1h, the n-hexane volatilizes completely and is loose; With 15 mL of HNO with a concentration of 0.2 mol / L 3 After the aqueous solution I was adjusted to a slurry state, the column was wet-packed and both ends of the chromatography column were filled with polytetrafluoroethylene filaments, and the chromatography column was balanced with 20 mL of nitric acid aqueous solution II with a concentration of 2.0 mol / L, and the concentration of nitric acid aqueous solution II was controlled. The flow rate is 2.0mL / min;

[0031] Wherein, the material of the chromatographic column used is glass, th...

Embodiment 3

[0036] (1) dissolving dipentyl pentyl phosphate and trioctyl phosphine oxide in n-hexane to prepare a n-hexane solution in which the concentration of dipentyl phosphate is 0.15mol / L and the concentration of TOPO is 0.15mol / L;

[0037](2) Under stirring, add the n-hexane solution prepared in 30mL step (1) dropwise in 30g polytetrafluoroethylene powder, then place it in a fume hood and stir for 1h, the n-hexane volatilizes completely and is loose; With 15mL of HNO with a concentration of 0.2mol / L 3 After the aqueous solution I was adjusted to a slurry state, the column was wet-packed and both ends of the chromatography column were filled with polytetrafluoroethylene filaments, and the chromatography column was balanced with 20 mL of nitric acid aqueous solution II with a concentration of 2.0 mol / L, and the concentration of nitric acid aqueous solution II was controlled. The flow rate is 2.0mL / min;

[0038] Wherein, the material of the chromatographic column used is glass, the i...

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Abstract

The invention relates to an extraction and separation method of a trace uranium element in a liquid sample and belongs to the technical field of trace analysis sample pretreatment. The method primarily utilizes a mixture of di-iso-amyl pentylphosphonate and trioctylphosphine oxide as an extraction agent, strictly controls a concentration of a nitric acid leaching solution, allows the uranium element to have a higher distribution coefficient and better adsorptive capacity, and therefore, achieves a better extraction and separation effect; and an ammonium carbonate solution with a specific concentration is used as an eluent to allow the uranium element to have a higher recovery rate. The extraction and separation method can achieve concentration of the trace uranium element in the liquid sample simply, conveniently and rapidly and separation of some interference heavy metal ions at the same time, and improves stability and reliability of a determination result of the trace uranium element in the liquid sample.

Description

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Claims

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Application Information

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Owner 中国人民解放军陆军防化学院
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