高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (11): 1980.

• 论文 • 上一篇    下一篇

纳米TiO2材料分离富集、悬浮体进样氟化辅助ETV-ICP-AES直接分析痕量稀土元素

杭义萍, 秦永超, 江祖成, 胡斌   

  1. 武汉大学化学与分子科学学院, 武汉 430072
  • 收稿日期:2002-03-27 出版日期:2003-11-24 发布日期:2003-11-24
  • 通讯作者: 秦永超(1952年出生),男,副教授,从事原子光谱联用技术研究.E-mail:ycqin@whu.edu.cn E-mail:ycqin@whu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:20175014)资助

Direct Analysis of Trace Rare EartHElements Through Nanometer-size Titanium Dioxide Separation/Concentration and Fluorination Assisted ETV-ICP-AES with Slurry Sampling

HANG Yi-Ping, QIN Yong-Chao, JIANG Zu-Cheng, HU Bin   

  1. Institute of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, China
  • Received:2002-03-27 Online:2003-11-24 Published:2003-11-24

摘要: 以纳米TiO2为吸附材料分离富集了稀土离子Y,Yb,Eu,La,Dy,Tm,Sm,Ho,Nd和Pr,研究了其吸附性能,并将吸附于纳米TiO2上的稀土离子直接制成悬浮体,用氟化辅助电热蒸发等离子体原子发射光谱(FETV-ICP-AES)进行检测,考察了上述稀土离子的蒸发行为.结果表明,基体元素可与待测物在灰化阶段完全分离,在优化的实验条件下,检出限和RSD结果均与文献值基本一致.

关键词: 纳米材料, 吸附, 悬浮体进样, 氟化辅助电热蒸发, 稀土元素

Abstract: In this paper, nanometer-size titanium dioxide(NSTD) is employed as a new type of adsorption material to separate and concentrate trace rare eartHElements(Y, Yb, Eu, La, Dy, Tm, Sm, Ho, Nd, Pr).The results show that NSTD can quantitatively adsorbed the ions of the elements under the condition of optimal pH(7.0).The ions adsorbed on NSTD can be directly determined with fluorination assisted electrothermal vaporization inductively coupled plasma atomic emission spectrometry(FETV-ICP-AES) through slurry sampling without elution at proper ashing temperature(600℃) and vaporization temperature(2400℃).The detection limit of those elementSIs 0.1, 0.08, 0.2, 0.3, 0.4, 0.1, 0.4, 0.1, 0.3 and 0.5 ng, respectively, and the corresponding RSD is 2.0%, 1.6%, 2.9%, 2.1%, 3.0%, 1.6%, 2.2%, 1.4%, 2.7% and 3.1%, respectively.

Key words: Nanometer-size material, Adsorption, Slurry sampling, Fluorination assisted electrothermal vaporization, Rare eartHElement

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