矩分析在硼同位素分离色谱中的应用研究

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Study on Applications of Moment Analysis in Chromatography for Boron Isotopes Separation

National Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 以D301-G树脂为固定相,水为流动相,通过矩分析研究2种硼同位素在给定条件下的色谱特征,基于平衡-扩散模型、线性驱动力模型估算了硼酸在固定相上的动力学参数。研究结果表明,同位素¹⁰B在树脂相上的色谱保留时间大于¹¹B;硼酸在D301-G树脂相中的轴向扩散系数和集总传质系数均随温度的升高而增大,室温下轴向扩散系数为1.08 cm²/min,集总传质系数为0.65 min-1。
- 矩分析 /
- 硼同位素 /
- 离子交换色谱
Abstract: Chromatographic characteristics for both boron isotopes,using D301-G resin as the stationary phase and water as the mobile phase,were investigated by moment analysis in the given conditions,and the kinetic parameters of boric acid on the stationary phase were evaluated by moment analysis based on equilibrium-diffuse and linear driving force models.The results show that the retention time of ¹⁰B isotope was lager than ¹¹B,and both the axial dispersion coefficient and the overall mass transfer coefficient of boric acid on the D301-G resin phase increase with increasing temperature.The axial dispersion coefficient was evaluated to be 1.08 cm²/min and the overall mass transfer coefficient was 0.65 min-1 at room temperature..
- Moment analysis /
- Boron isotopes /
- Ion exchange chromatography