Optimization of thorium content determination method in typical associated ore waste residue

BI Mingliang; LIAO Shen; LI Xiaoyan

doi:10.11889/j.1000-3436.2023-0024

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Optimization of thorium content determination method in typical associated ore waste residue

RADIATION INTERDISCIPLINARY RESEARCH | 更新时间：2023-08-29

- Optimization of thorium content determination method in typical associated ore waste residue
- Journal of Radiation Research and Radiation Processing Vol. 41, Issue 4, Pages: 40701(2023)
- 作者机构：
  
  1.广东省核工业地质局辐射环境监测中心广州 510800
  2.广东核力工程勘察院广州 510800
  3.东华理工大学核科学与工程学院南昌 330013
- 作者简介：
  
  BI Mingliang (male) was born in 1989, and graduated from Lanzhou University in 2016 with a master's degree in radiochemistry, mainly engaged in radiation environment monitoring and chemical analysis, an engineer
- 基金信息：
- DOI：10.11889/j.1000-3436.2023-0024
  CLC：
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BI Mingliang, LIAO Shen, LI Xiaoyan. Optimization of thorium content determination method in typical associated ore waste residue. [J]. Journal of Radiation Research and Radiation Processing 41(4):040701(2023)
DOI：

BI Mingliang, LIAO Shen, LI Xiaoyan. Optimization of thorium content determination method in typical associated ore waste residue. [J]. Journal of Radiation Research and Radiation Processing 41(4):040701(2023) DOI： 10.11889/j.1000-3436.2023-0024.

摘要

以6种典型伴生矿废渣样品为研究对象，通过分光光度法测定样品中钍含量，分析影响测试结果的因素。选出3个可能显著影响结果准确度的因素，利用控制变量法对实验条件进行优化，再通过电感耦合等离子体质谱法和γ能谱法对结果进行对比，以此证明本优化方法的可靠性。结果表明：影响结果准确度的主要因素为消解次数、比色时间、样品残留萃取剂，分别通过增加消解次数至3次、保证比色时间为3~5 min、加入双氧水和高氯酸消解去除萃取剂来优化方法，提高了6种典型伴生矿废渣中钍的检测准确度和检测效率。

Abstract

Taking six typical associated ore waste samples as the research object, the thorium content in the samples was determined by spectrophotometry and the factors affecting the test results were analyzed. Three factors that may obviously affect the accuracy of the results were selected and optimized the experimental conditions by controlling variates, and the results were compared with inductively coupled plasma mass spectrometry and gamma spectrometry to prove the reliability of the optimization method. The results showed that the main affecting factors in the sample were the digestion frequency, colorimetric time, and residual extractant. The detection accuracy and efficiency of thorium in the six typical associated ore residues were improved by increasing the digestion frequency to 3 times, ensuring a colorimetric time of 3 min to 5 min, and adding hydrogen peroxide and perchloric acid to remove the extractant.

关键词

钍典型伴生矿分光光度法方法比对

Keywords

ThoriumTypical associated oreSpectrophotometryComparative experiment

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