中文摘要：

以基于离轴积分腔输出光谱（OA-ICOS）原理的液态水同位素分析仪为例,通过开展记忆效应分析实验和标定方法分析实验,分析了氢氧同位素测试分析中的记忆效应表现特征,讨论了记忆效应对测试结果的影响程度,探讨了记忆效应标定方法。研究结果表明：采用常规运行方法进行氢同位素测试分析时,记忆效应是明显存在的,而进行氧同位素测试分析时,记忆效应表现并不明显;采用常规运行方法进行氢、氧同位素测试分析,基本可以达到液态水同位素分析仪的保证精度;测针次数的增加,对于提高氢、氧同位素的测试分析精度具有有效作用;选择与待测样品δ值最为相近的3个标样进行测试分析和标定处理工作,可达到提高测试效率、节省测试成本、提高测试精度的目的。

英文摘要：

There are several experiments for memory effect analysis and post-processing method analysis carried on in this study, using a liquid water isotope analyzer based on the theory of off-axis integrated cavity output spectroscopy （OA-ICOS）. The performance characteristics and impacts on the determination results from the analyzer of memory effect were analyzed through these experiments. And the post-processing methods in the hydrogen and oxygen isotope determination were discussed. The results indicate that the memory effect is significant in hydrogen isotope determination. However, the performance of the memory effect is not obvious in oxygen isotope determination using conventional method. Basically, the accuracy of liquid-water isotope analyzer can be ensured in hydrogen and oxygen isotope determination using the conventional methods. It is shown that the accuracy of hydrogen and oxygen isotope analysis can be improved by increasing determination times. It is an effective way to improve the efficiency and accuracy of isotope determination and save the experimental costs by choosing three standard samples which δ values are most closely to that of the samples in hydrogen and oxygen isotope determination and post-processing.