Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan.
Anal Chem. 2013 Jul 16;85(14):6894-901. doi: 10.1021/ac4011777. Epub 2013 Jul 3.
The isotopic composition of carbon dioxide provides a powerful tool and has been widely used for constraining the sources and sinks of atmospheric CO2. In this work, we demonstrate a simple, rapid, and clean way for measuring the triple oxygen isotope ratio of carbon dioxide with high precision. The method depends on isotope exchange between O2 and CO2 in the presence of platinum at high temperature and allows rapid measurement of Δ(17)O of CO2. The method has been established and confirmed through several tests by using artificially made CO2 with known Δ(17)O values. The analytical precision obtained for determining Δ(17)O in CO2 is 0.045‰ (1 - σ standard deviation).
二氧化碳的同位素组成提供了一种强大的工具，已被广泛用于约束大气 CO2 的源和汇。在这项工作中，我们展示了一种简单、快速和清洁的方法，用于高精度测量二氧化碳的三重氧同位素比。该方法依赖于高温下铂存在时 O2 和 CO2 之间的同位素交换，允许快速测量 CO2 的 Δ(17)O。该方法已通过使用具有已知 Δ(17)O 值的人工 CO2 进行的多次测试得到建立和确认。确定 CO2 中 Δ(17)O 的分析精度为 0.045‰（1 - σ 标准偏差）。
