紫外脉冲荧光法测定伴生放射性矿中铀含量

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英文篇名：Determination of uranium contents in NORM by Ultraviolet Pulse Fluorometry 作者：黄秋红 ; 郭冬发 ; 王铁健 ; 李黎 ; 田飞 ; 周良慧 ; 曲颖 英文作者：HUANG Qiuhong;GUO Dongfa;WANG Tiejian;LI Li;TIAN Fei;ZHOU Lianghui;QU Ying;Beijing Research Institute of Uranium Geology; 关键词：紫外脉冲荧光法 ; 伴生放射性矿样品 ; 过氧化钠熔融 英文关键词：Ultraviolet Pulse Fluorometry;;NORM samples;;fused with Na2O2 中文刊名：世界核地质科学 英文刊名：World Nuclear Geoscience 机构：核工业北京地质研究院; 出版日期：2019-03-15 出版单位：世界核地质科学 年：2019 期：01 基金：地质调查标准修订与升级推广项目(编号:12120115055001)资助 语种：中文; 页：64-68+74 页数：6 CN：11-4914/TL ISSN：1672-0636 分类号：P619.14;P575

摘要

铌、钽、锆、铪、稀土等伴生放射性矿样品较难用常规的混酸分解,采用过氧化钠在700℃下熔融,热水提取,硝酸酸化,用紫外脉冲荧光法进行铀的测定,方法简单,抗基体干扰能力强。测定范围为0.66μg·g~(-1)～4 500μg·g~(-1),在铀含量为3 000μg·g~(-1)时,方法的精密度2.55%,在300μg·g~(-1)左右时,方法的正确度5.21%。
        NORM samples with Nb, Ta, Zr, Hf and Rare Earth Elements are difficult to be decomposed by mixed acid. In this paper, NORM samples were fused with Na_2O_2 at 700 ℃, extracted by hot water, acidized with nitric acid, and the uranium content was measured by Ultraviolet Pulse Fluorometry. The method is simple, and has strong anti-matrix interference ability. The measuring range of U is 0.66 μg·g~(-1)～4 500 μg·g~(-1), precision with relative standard deviation is 2.55% when the content of U is 3 000 μg·g~(-1), trueness with relative bias is 5.21% when the U content is 300 μg·g~(-1).

引文

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