Oxygen Isotope Exchange between O2 and CO2 over Hot Platinum: An Innovative Technique for Measuring 螖17O in CO2

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• 作者：Sasadhar Mahata ; S. K. Bhattacharya ; Chung-Ho Wang ; Mao-Chang Liang
• 刊名：Analytical Chemistry
• 出版年：2013
• 出版时间：July 16, 2013
• 年：2013
• 卷：85
• 期：14
• 页码：6894-6901
• 全文大小：270K
• 年卷期：v.85,no.14(July 16, 2013)
• ISSN：1520-6882

文摘

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 螖¹⁷O of CO₂. The method has been established and confirmed through several tests by using artificially made CO₂ with known 螖¹⁷O values. The analytical precision obtained for determining 螖¹⁷O in CO₂ is 0.045鈥?(1 鈥?蟽 standard deviation).