IRMS定量分析超轻水中氘同位素

Deuterium Quantitative Analysis of Deuterium Depleted Water (DDW) by IRMS

摘要: 超轻水氘同位素定量分析结果误差的主要来源是记忆效应和仪器的精确性等方面。为了探讨更准确快速的超轻水中氢同位素比值检测分析方法，采用疏水铂催化H₂-H₂O平衡法以及稳定同位素质谱仪来作为定量检测方法。分析标准水样、超轻水和蒸馏水样品的测试结果显示：多次分析标准水样，测量值均在推荐值的误差允许范围内；测试超轻水及蒸馏水相对标准偏差在1%以内（n≥5）。结果初步证明该分析方法减少了记忆效应和仪器精确性带来的误差，提高了超轻水检测的可靠性和稳定性。

Abstract: The main error of deuterium quantitative analysis of deuterium depleted water(DDW) is from memory effect and instrument accuracy. In order to analyze hydrogen isotopes of DDW more accurately and rapidly, IRMS with hydrophobic platinum catalytic H₂-H₂O equilibration method was applied. The results of the analysis of standard water samples, DDW and distilled water show that the measurements of standard water samples are all in the range of certified values, while the relative standard deviations (s_r) of the detection values of DDW and distilled water are less than 1% (n≥5). Therefore, it is proved that the method reduces the error from memory effect and instrument accuracy, which provides the incensement of the dependability and stability of DDW detection.