磁助捕集分离制样/X射线荧光测量微量Tc

Determination of Trace Technetium by Magnetically Assisted Sample Preparation/X-Ray Fluorescence Spectrometer

摘要: 建立了磁助捕集分离制样（MASP）/X射线荧光分析微量Tc的方法，使用磁化树脂作为固相捕集剂捕集溶液中的锝，利用外加磁场快速分离制样，实现捕集、分离及制样同时完成，可直接使用X射线荧光测量样品Tc含量。研究并分析了反应时间、磁化树脂用量、液相体积及酸度等因素对测量的影响，给出了推荐测量分析流程。使用磁助捕集分离制样，对Tc的检出限为0.33 mg/L，满足PUREX流程1AW工艺点测量Tc的要求。

Abstract: A magnetically assisted sample preparation(MASP) process for capturing and separating trace Tc has been established by X-ray florescence spectrometer. By using TEVA paramagnetic capture, the sample can be prepared quickly while concentration and separation are all done. The influences of reacting time, the mass of capture used, the volume and acidity of aqueous phase on this sample preparation have been studied. The detection limit is 0.33 mg/L, which meets the requirements of analyzing Tc by XRF at 1AW in PUREX.