热表面电离质谱法测定贫化铀样品痕量铀同位素比值及含量

郝樊华; 刘雪梅; 胡思得; 龙开明

热表面电离质谱法测定贫化铀样品痕量铀同位素比值及含量

1.
中国工程物理研究院核物理与化学研究所, 四川绵阳 621900
2.
中国工程物理研究院核物理与化学研究所, 四川绵阳 621900
3.
中国工程物理研究院核物理与化学研究所, 四川绵阳 621900
4.
中国工程物理研究院核物理与化学研究所, 四川绵阳 621900

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出版历程
- 收稿日期: 2009-08-25
- 修回日期: 2009-12-14

Determinationof Isotope Ratios and Concentration of Trace Uranium in Depleted Uranium Samples by Thermal Ionization Mass Spectrometry

1.
Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics, Mianyang 621900, China
2.
Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics, Mianyang 621900, China
3.
Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics, Mianyang 621900, China
4.
Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics, Mianyang 621900, China

摘要

摘要: 选用磷酸为离子流发射剂,热表面电离质谱法分析纳克量级贫化铀样品的铀同位素比值,方法最大相对标准偏差＜2.9％。以²³³U为稀释剂,采用同位素稀释法对铀的含量进行测定,扩展不确定度为2.4%(K=2)。研究表明,在纳克量级的铀同位素比值测定中,来自铼带等铀本底的干扰影响不容忽视,需要进一步研究并扣除。
- 铀 /
- 同位素 /
- 纳克量级 /
- 贫化铀样品 /
- 热表面电离质谱法
Abstract: With H₃PO₄ as the ionization intensifier, the isotope ratios of uranium in the depleted uranium samples with uranium concentration at nanogram-level were determined by thermal ionization mass spectrometry (TIMS) with the precision of ＜2.9％RSD. With ²³³U as the diluent, the concentration of uranium in the samples were also determined by isotope dilution mass spectrometry (IDMS) with the expanded uncertainty of 2.4% .The research results showed that in uranium isotope ratio determination for the samples with nanogram-level of uranium, uranium background interference from rhenium filament and other sources should not be ignored, which is needed for further study to remove the background interference.
- uranium /
- isotope /
- nanogram-level /
- depleted /
- uranium

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参考文献(15)

陈波,龚建,郝樊华.铀材料的识别[J].核技术,1996,19(8):497-501.

韩军,傅中华,贾宝亭,刘雪梅,毛欣根,孟繁本.用内标技术测量环境样品中的铀[J].核化学与放射化学,2004,26(4):239-242.

Magara M, Hanzawa Y, Esaka F. Development of environmental sample analysis techniques for safeguards .Japan: Japan Atomic Energy Research Institute,1999:471-474.

龙开明,付中华,毛欣根,邢丕峰,孟繁本,贾宝亭.痕量铀、钚样品中同位素比值的测定[J].质谱学报,1997,21(3-4):163

-164.

Fassett J D, Kelly W R. Interlaboratory isotopic ratio measurement of nanogram quantities of uranium and plutonium on resin beads by thermal ionization mass spectrometry[J].Analytical Chemistry,1984,56:550-556.

黄文,张青莲.自贡锂的同位素丰度研究[J].质谱学报,1993,14(2):1-5.

周涛,李金英,赵墨田.校准质谱法测定锂同位素丰度[J].质谱学报,2000,21(3-4):185

-187.

孙爱德,肖应凯.锂同位素质谱法测定及其样品制备研究进展[J].盐湖研究,2001,19(3):64-71.

魏兴俭,赵忠刚,华永明.加载技术在同位素质谱分析技术上的应用研究 .北京:中国核情报所,1998,4(1):23-32.

刘雪梅,龙开明,贾宝亭,汤磊,杨天丽,刘钊.热表面电离质谱法对锂同位素的测定[J].核化学与放射化学,2006,28(3):188-191.

贾宝亭,龙开明,刘雪梅.热电离质谱法分析锂同位素的技术研究[J].核科学技术与应用,2005,1(1):41-44.

黄达峰,罗修泉,李喜斌,邓中国.同位素质谱技术与应用[M].北京:化学工业出版社,2006:271-272.

赵墨田,曹永明,陈刚,姜山.无机质谱概论[M].北京:化学工业出版社,2006:16-17.

魏兴俭,徐新冕,张海路,华永明.全蒸发技术在铀同位素丰度测量上的应用[J].质谱学报,2003,22(1):7-14.

李思华.质谱同位素稀释法测定铀的一个误差估计公式[J].数学的实践与认识,1997,27(2):128-132.