Method for analyzing uranium isotope content in aerosol by using UTEVA resin

An aerosol and isotope technology, applied in the field of radiation environmental monitoring, can solve the problem of less UTEVA resin, achieve stable recovery rate, improve accuracy and reliability, and achieve good results in accuracy and precision

Active Publication Date: 2021-08-27
CHINA INST FOR RADIATION PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there are few reports on the application of UTEVA resin in HCl system

Method used

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  • Method for analyzing uranium isotope content in aerosol by using UTEVA resin
  • Method for analyzing uranium isotope content in aerosol by using UTEVA resin
  • Method for analyzing uranium isotope content in aerosol by using UTEVA resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Pre-experimental analysis of uranium isotope content in aerosol using UTEVA resin

[0029] (1) Take a total of 4 parts of 20mL 5M hydrochloric acid as the pre-experimental sample matrix solution, and add 2.0mL Fe 3+ Solution (~10mg / mL), 2.0mL 232 U standard solution (0.04938Bq / mL), 1.0mL 242 Pu standard solution (0.0745Bq / mL) and 1.0mL thorium standard solution (10mg / mL) to prepare 4 sample solutions.

[0030] (2) Add 1.0 g of ascorbic acid to each sample solution, stir until it is completely dissolved, and let stand for 10 minutes. At this time, the solution is colorless.

[0031] (3) UTEVA column packing and balance. Dry packing, fill the resin column with 2.0g UTEVA resin powder. Use 15mL of 5M hydrochloric acid to equilibrate the resin column three times, and use a vacuum pump to dry each time.

[0032] (4) Each sample solution was transferred to a resin column to start separation and purification, and the flow rate was controlled at 1-2 mL / min.

[...

Embodiment 2

[0042] Example 2: Verification experiment of actual aerosol samples using UTEVA resin to analyze uranium isotope content in aerosols

[0043] (1) Add tracer to aerosol sample 232 U standard solution (~0.1Bq), after drying, transfer to muffle furnace, ashing at 500-700°C for 4-6h;

[0044] (2) Add HF to the sample ash and heat to dissolve, evaporate to dryness and add 5M hydrochloric acid (15-30mL) to convert it into a hydrochloric acid system solution;

[0045] (3) Add 0.5-1g of ascorbic acid to the sample solution, and stir until completely dissolved;

[0046] (4) Put 1-2g of UTEVA resin powder into the resin column, equilibrate with 5M hydrochloric acid solution (10-20mL), and drain;

[0047] (5) Make the sample solution pass through the UTEVA resin column at a flow rate of 1-2mL / min, and drain it;

[0048] (6) Wash the resin column with 5M hydrochloric acid solution (15-20mL) and drain it to remove residual Fe 2+ and possible interfering nuclides such as Pu, use 0.1M hy...

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Abstract

The invention belongs to the technical field of radiation environment monitoring, and relates to a method for analyzing uranium isotope content in aerosol by using UTEVA resin. The method comprises the following steps: (1) ashing; (2) transferring a system; (3) carrying out resin separation; (4) drying by distillation; and (5) measuring. According to the method for analyzing the uranium isotope content in the aerosol by using the UTEVA resin, the hydrochloric acid solution can be used as a separation and purification system, the analysis process is simplified, the applicability of the UTEVA resin is improved, and the accuracy and reliability of uranium isotope analysis results are improved.

Description

technical field [0001] The invention belongs to the technical field of radiation environment monitoring, and relates to a method for analyzing uranium isotope content in aerosol by using UTEVA resin. Background technique [0002] UTEVA resin has been developed in recent years. It has a very good separation and purification effect on uranium. It can extract tetravalent and hexavalent ions together in a nitric acid system above 1M, and desorb with a small amount of reagents. It is often used in Th And U separation, high recovery and good stability. [0003] UTEVA resin is often used in nitric acid system (TOSHEVA, 2006; Casacuberta, 2012; Park, 2013; Arnason, 2013; Baik, 2015; Xu Ling, 2001; Yi Xiaowei, 2010; Lu Tong, 2018), the operation steps are very simple , the nitric acid system above 1M is often used as the upper column solution system, and HNO can be used according to the type of elements to be decontaminated (americium, plutonium, neptunium, thorium, etc.) 3 , HCl, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/167
CPCG01T1/167Y02E30/30
Inventor 李周马旭媛李鹏翔张静杨彪韩玉虎师琦琦宋沁楠王瑞俊保莉任晓娜杨海兰易武静高泽全杨有坤杨宇轩
Owner CHINA INST FOR RADIATION PROTECTION
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