冠醚分离锂同位素中冠醚的近红外分析  

Determination of crown ether in crown-ether separation process of lithium isotopes using near infrared spectrophotometric method

作　　者：张永申 李定明[1] 汤祺 徐马丽 ZHANG Yongshen;LI Dingming;TANG Qi;XU Mali(Department of Radiochemistry,China Institute of Atomic Energy,Beijing 102413)

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《分析试验室》2022年第4期444-448,共5页Chinese Journal of Analysis Laboratory

摘　　要：将近红外光谱法(NIR)和偏最小二乘法(PLS)相结合,建立了冠醚分离锂同位素中冠醚含量的分析方法,研究了锂、钠、钾离子的存在对冠醚测定的影响,并研究了不同离子液体对校正模型的影响。该方法的测定范围为0.1~1.2 mol/L,加入校正样品后,可扩大测定范围。冠醚分离锂同位素实验样品分析结果和设计值较吻合,加标回收率为105%~108%。所建立的方法为锂同位素分离工艺中冠醚的快速分析提供了一种新方法。Near infrared spectroscopy and partial least squares(PLS)were combined to establish the analysis method of crown ether content in the process of lithium isotope separation by crown ether.The influences of lithium,sodium and potassium ions on the determination of crown ether,and different ionic liquids on the calibration model were studied.The determination range of the method was 0.1-1.2 mol/L.And it can be expanded by adding calibration samples.The results of the experimental samples of separation of lithium isotopes by crown ether were in agreement with the design values,and the recoveries were 105%-108%.A new method was provided for the rapid analysis of crown ether in lithium isotope separation process.

关 键 词：冠醚 近红外光谱法 偏最小二乘法 

分 类 号：O657.33[理学—分析化学]