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Evaluation on nitrogen isotopes analysis in high-C/N-ratio plants using elemental analyzer/isotope ratio mass spectrometry
Hu, J (Hu Jing)[ 1 ]; Liu, WG (Liu Wei-Guo)[ 1,2 ]
2014-07-01
Source PublicationNUCLEAR SCIENCE AND TECHNIQUES
Volume25Issue:2Pages:20303
Subtype期刊论文
Abstract

Elemental analyzer/isotope ratio mass spectrometry (EA/IRMS) has been widely applied to analyze the N-15/N-14 isotope composition (delta N-15) of plants and soils, but the delta N-15 results may be inaccurate due to incomplete combustion of the high-C/N-ratio plant samples by EA. Therefore, it is necessary to develop a method to solve the problem of imperfect combustion. In this study, we used two methods: 1) adding copper oxide powder to the samples, and 2) increasing the O-2 flow (from 100 mL min(-1) to 200 mL min(-1)) for the auto sampler inlet purge line of the EA. The delta N-15 values of the plant samples became more positive and tended to be stable after complete combustion. Also, the required blank samples for each plant sample decreased with increasing amount of the added CuO powder. However, at 200 mL min(-1) of the oxygen flow in the EA, complete combustion could not be achieved without adding copper oxide, but this was done with decreased amount of CuO powder. Therefore, mixing cupric oxide into the high-C/N-ratio samples was an efficient, simple and convenient way to solve the problem of imperfect combustion in the EA.

KeywordNitrogen Isotopes Cupric Oxide O2 Flow Of Ea/irms High-c/n-ratio Plants Ea/irms
Indexed BySCIE
Language英语
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9727
Collection加速器质谱中心
Corresponding AuthorLiu, WG (Liu Wei-Guo)[ 1,2 ]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
2.Xi’an Jiaotong University, Xi’an 710049, China
Recommended Citation
GB/T 7714
Hu, J ,Liu, WG . Evaluation on nitrogen isotopes analysis in high-C/N-ratio plants using elemental analyzer/isotope ratio mass spectrometry[J]. NUCLEAR SCIENCE AND TECHNIQUES,2014,25(2):20303.
APA Hu, J ,&Liu, WG .(2014).Evaluation on nitrogen isotopes analysis in high-C/N-ratio plants using elemental analyzer/isotope ratio mass spectrometry.NUCLEAR SCIENCE AND TECHNIQUES,25(2),20303.
MLA Hu, J ,et al."Evaluation on nitrogen isotopes analysis in high-C/N-ratio plants using elemental analyzer/isotope ratio mass spectrometry".NUCLEAR SCIENCE AND TECHNIQUES 25.2(2014):20303.
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