Application of simultaneous thermal analysis mass spectrometry and stable carbon isotope analysis in a carbon sequestration study.
Application of simultaneous thermal analysis mass spectrometry and stable carbon isotope analysis in a carbon sequestration study.
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同时热分析质谱和稳定碳同位素分析在碳封存研究中的应用。
DOI：
10.1002/rcm.2145
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
D. Manning
中科院分区：
文献类型：
--
作者：
E. Lopez‐Capel;R. Bol;D. Manning
作为热分析实验的一部分，同时分析逸出气体和确定稳定同位素组成 (delta13C) 已用于 (a) 区分土壤中碳 (C) 和氮 (N) 的大量化学主体，以及 (b) 在土壤封存实验中追踪标记的 C。将 C3 和 C4 粪便施用于牧场土壤，并采集土壤样品进行分析。热重-差示扫描量热-四极杆质谱-同位素比质谱（TG-DSC-QMS-IRMS）的结果表明，粪便中难熔碳（类木质素）的比例大于土壤有机质（SOM），并且随着土壤中时间的延长而增加。对逸出气体的分析表明，氮气与更难熔的碳的分解相关，而与不稳定的碳成分的相关性不那么强。 IRMS 分析区分了 C3 和 C4 粪便，并可以估算土壤样品中这些来源的 C 含量。大多数粪便 C 进入难降解的 SOM 部分。本文展示了 TG-DSC-QMS-IRMS 在 SOM 研究中的潜力。
The simultaneous analysis of evolved gases and the determination of stable isotope composition (delta13C) as part of a thermal analysis experiment have been used to (a) distinguish bulk chemical hosts for carbon (C) and nitrogen (N) within a soil and (b) track labelled C within a soil sequestration experiment. C3 and C4 dung was applied to a pasture soil, and soil samples taken for analysis. The results of thermogravimetry-differential scanning calorimetry-quadrupole mass spectrometry-isotope ratio mass spectrometry (TG-DSC-QMS-IRMS) show that the proportion of more refractory C (lignin-like) is greater for the dungs than for the soil organic matter (SOM), and that this increases with time within the soil. Analysis of evolved gases shows that nitrogen is associated with the decomposition of more refractory C, and is not so strongly associated with the labile C component. IRMS analysis distinguished C3 and C4 dung, and allowed the amount of C from these sources to be estimated for the soil samples. Most dung C enters the refractory SOM fraction. This paper demonstrates the potential of TG-DSC-QMS-IRMS in the investigation of SOM.