首页> 外文会议>International conference on rare earth development and application;ICRE'2001 >HPLC Combined with ICP Spectrometry for the Determination of Trace Rare Earth Impurities in High-purity Rare Earth Oxides by Using 2-ethylhexyl Hydrogen 2-ethylhexylphosphonate Resin as the Stationary Phase
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HPLC Combined with ICP Spectrometry for the Determination of Trace Rare Earth Impurities in High-purity Rare Earth Oxides by Using 2-ethylhexyl Hydrogen 2-ethylhexylphosphonate Resin as the Stationary Phase

机译:HPLC-ICP-MS联用2-乙基己基膦酸2-乙基己基氢酯树脂测定高纯稀土氧化物中的痕量稀土杂质

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A new method is proposed to determine trace rare earth impurities in high-purity rare earth oxides by HPLC combined with inductively coupled plasma mass spectrometry (ICP-MS) or electrothermal vaporization inductively coupled plasma atomic emission spectrometry (ETV-ICP-AES). The chromatographic retention behaviors of matrix (Ce and La) and rare earth impurities were studied using 2-ethylhexyl hydrogen 2-ethylhexylphosphonate (P507) resin as the stationary phase and dilute nitric acid as the mobile phase. It was found that the matrix (La or Ce) can be separated quantitatively with dilute nitric acid as mobile phase, and the use of EDTA as a eluent enable effective elution of rare earth impurities (Ce-Lu or Pr-Lu) from HPLC column. The experimental results showed that a favorable separation between matrix (La or Ce) and rare earth impurities (Ce-Lu or Pr-Lu) could be obtained within 60 min. The proposed method has been applied to the determination of 1 4 rare earth impurities in high-purity CeO_2 and La_2O_3 with satisfactory results,
机译:提出了一种结合高效液相色谱-电感耦合等离子体质谱法(ICP-MS)或电热汽化电感耦合等离子体原子发射光谱法(ETV-ICP-AES)测定高纯稀土氧化物中痕量稀土杂质的新方法。以2-乙基己基氢-2-乙基己基膦酸酯(P507)树脂为固定相,稀硝酸为流动相,研究了基质(Ce和La)和稀土杂质的色谱保留行为。发现可以用稀硝酸作为流动相定量分离基质(La或Ce),使用EDTA作为洗脱液可以有效地从HPLC柱上洗脱稀土杂质(Ce-Lu或Pr-Lu) 。实验结果表明,在60分钟内可以实现基质(La或Ce)与稀土杂质(Ce-Lu或Pr-Lu)的良好分离。该方法用于高纯CeO_2和La_2O_3中1 4种稀土杂质的测定,结果令人满意,

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