高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (6): 809.

• 论文 • 上一篇    下一篇

元素在石墨炉内石墨探针表面上的原子化机理研究(ⅩⅣ)─钐的原子化机理

高云庚, 邓勃   

  1. 清华大学化学系, 北京, 100084
  • 收稿日期:1993-07-28 修回日期:1994-01-24 出版日期:1994-06-24 发布日期:1994-06-24
  • 通讯作者: 邓勃.
  • 作者简介:高云庚.男,26岁,硕士,现在北京市环境保护监测中心工作.
  • 基金资助:

    国家自然科学基金

Studies on the Atomization Mechanism of Sanmarium on the Graphite Probe Surface in the Graphite Furnace

GAO Yun-Geng, DENG Bo   

  1. Department of Chemistry, Tsinghua University, Beijing, 100084
  • Received:1993-07-28 Revised:1994-01-24 Online:1994-06-24 Published:1994-06-24

摘要: 综合运用X射线衍射、X射线光电子能谱与俄歇电子能谱等表面分析手段研究了石墨炉中石墨探针表面钐样品的原子化过程。发现在石墨炉升温过程中,钐样品先转化为Sm2O3,再由Sm2O3热分解为SmO,原子化起源于SmO的热分解;在Sm2O3与探针接触的表面有碳化物生成,碳化物是造成记忆效应的重要原因。

关键词: 原子化机理, 石墨探针,

Abstract: In this paper, atomization mechanism of Sm(NO3)3 and Sm2O3 on the graphite probe surface in the graphite furnace was investigated experimentally using X-ray diffraction spectrometry.X-ray photoelectron spectroscopy and Auger electron spectroscopy.It showed that in the course of atomization, the samarium samples firstly decomposed into Sm2O3 then converted into SmOand samarium carbide, the atomization of samarium originated from the thermal decomposition of SmO, the formation of refractory carbide accounted for the severe memory effect of determination.

Key words: Atomization mechanism, Graphite prode, Samarium

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