Improved Sealed-Tube Combustion of Organic Samples to CO2 for Stable Carbon Isotope Analysis, Radiocarbon Dating and Percent Carbon Determinations
Improved Sealed-Tube Combustion of Organic Samples to CO2 for Stable Carbon Isotope Analysis, Radiocarbon Dating and Percent Carbon Determinations
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改进有机样品密封管燃烧生成二氧化碳，用于稳定碳同位素分析、放射性碳测年和碳百分比测定
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
R. Dams
中科院分区：
文献类型：
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作者：
K. Vandeputte;L. Moens;R. Dams
摘要本说明涉及有机材料在Pyrex和石英管中燃烧成CO2的优化。考察了温度和氧化剂对燃烧产率的影响。不同物理形式的CuO和CuO/MnO 2-混合物被用作氧化剂。通过CO2的气体同位素比质谱（GIRMS）测试了燃烧过程中可能的同位素效应。采用CuO棒与20%MnO2混合作为氧化剂，在Pyrex中于530 °C燃烧，获得了优异的结果。用该方法制备的CO2稳定同位素结果准确，精密度为0.030%。对于需要定量燃烧的应用，我们建议使用CuO粉末（< 100 μm）作为氧化剂，燃烧温度为850 °C。
Abstract The present note deals with the optimization of the combustion of organic materials to CO2 in Pyrex and quartz tubes. The influence of temperature and oxidant on the combustion yield was investigated. Different physical forms of CuO and a CuO/MnO2-mixture were used as oxidants. Possible isotopic effects during combustion were tested by gas isotope ratio mass spectrometry (GIRMS) of the CO2. Excellent results were obtained for combustion in Pyrex at 530 °C using CuO rods mixed with 20% MnO2 as oxidant. The stable isotope results for CO2 prepared with this method were accurate and showed a very good precision of 0.030 %. Applications for which quantitative combustion is a necessity, we suggest the use of CuO powder (< 100 μm) as oxidant and a combustion temperature of 850 °C.