同位素稀释-高分辨电感耦合等离子体质谱法测定高纯石英中痕量铀不确定度的评定

摘要

Implementing a quality control system according to the guidelines of ISO17025,requires the validation of methods as well as the estimation of measurements. In this study, the uncertainty of the determination of trace uranium by isotope dilution high resolution inductively coupled plasma mass spectrometry (ID-ICPMS) had been evaluated.This evaluation illustrated the contribution of uncertainty of the blend isotope ratios was large. So the accuracy of determination of the isotope ratios is the major factor for improving the accuracy of the method.