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化学学报
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化学学报 ›› 2000, Vol. 58 ›› Issue (10): 1291-1295. 上一篇    下一篇

研究论文

萃取色层分离同位素稀释ICP-MS测定空气中费克 量钚

金玉仁;章连众;韩世钧;朱凤蓉;白峻峰;周国庆;马锋;张利兴   

  1. 浙江大学化学系.杭州(310027);西北核技术研究所.西安(710000)
  • 发布日期:2000-10-15

Determination of fetogram plutonium by extraction chromatography using isotope dilution inductively coupled plasma mass spectrometry

Jin Yuren;Zhang Lianzhong;Han Shijun;Zhu Fengrong;Bai Junfeng;Zhou Guoqing;Ma Feng;Zhang Lixing   

  1. Zhejiang Univ, Dept Chem.Hangzhou(310027);NW Inst Nucl Technol, POB 69.Xian(710000)
  • Published:2000-10-15

PDF

493

被引次数

12

ICP-MS测定环境样品中超痕量^2^3^9Pu时，^2^3^8UH^+会对m/z239的测量带来干扰。测得UH^+的产生几率为4.6×10^-^5，通过三正辛胺色层分离后，对铀的去除率为10^4，可以有效地去除^2^3^8UH^+离子峰对^2^3^9Pu测定的干扰。钚的回收率为75%。同位素稀释法对^2^3^9Pu的检出限为4.5×10^-^1^5g/mL，方法的定量测定限为16×10^-^1^5g/mL。用所建立的方法测得我国某地区空气中^2^3^9Pu的浓度为4.8×10^-^1^7g/m^3。

关键词: 萃取, 电感耦合等离子体质谱, 钚, 三辛胺

This work reports the determination of fetogram plutonium using isotope dilution ICP-MS. The interference of protonated uranium at m/z of 239, with a determined UH^+/U^+ ratio of 4.6×10^-^5, was removed by using tri-n-octylamine extraction chromatography. The separation factor of 10^4 was achieved for uranium and the recovery of plutonium was greater than 75%. By applying isotope dilution, fetogram range of plutonium was measured using a high-resolution ICP- MS with a sample volume of less than 1mL. The limit of detection of ^2^3^9Pu is 4.5×10^-^1^5 g/mL for standard solution, and 16.3×10^- ^1^5g/mL for real sample with matrix. The concentration of ^2^3^9Pu in region atmosphere was determined at a level of (4.8±2.9)×10^- ^1^7g/m^3.

Key words: EXTRACTION, PLUTONIUM, TRIOCTYLAMINE

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