Development of automated preparation system for isotopocule analysis of N 2 O in various air samples
Development of automated preparation system for isotopocule analysis of N 2 O in various air samples
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各种空气样品中N 2 O同位素分析自动化制备系统的开发
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
N. Yoshida
中科院分区：
文献类型：
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作者：
S. Toyoda;N. Yoshida
摘要。一氧化二氮（N2O）是大气中日益丰富的温室气体，是本世纪最重要的平流层臭氧消耗气体。N2O的天然同位素丰度比，即NNO分子被氮和氧的稳定同位素所取代，是研究N2O各种来源或生产途径及其吸收或分解途径的一个有希望的指标。据报道，几种自动化方法提高了大气N2O同位素比的分析精度，减少了与质谱分析相关的复杂样品制备程序所需的劳动。然而，没有一种方法能适应体积或压力有限的烧瓶样品。在这里，我们提出了一个自动化的预浓缩系统，它提供了相对于可用气体体积，压力和N2O浓度的灵活性。典型大气样品单次分析的最短处理时间为40 min。同位素比分析的精密度值为
Abstract. Nitrous oxide (N2O), an increasingly abundant greenhouse gas in the atmosphere, is the most important stratospheric ozone-depleting gas of this century. Natural abundance ratios of isotopocules of N2O, NNO molecules substituted with stable isotopes of nitrogen and oxygen, are a promising index of various sources or production pathways of N2O and of its sink or decomposition pathways. Several automated methods have been reported to improve the analytical precision for the isotopocule ratio of atmospheric N2O and to reduce the labor necessary for complicated sample preparation procedures related to mass spectrometric analysis. However, no method accommodates flask samples with limited volume or pressure. Here we present an automated preconcentration system which offers flexibility with respect to the available gas volume, pressure, and N2O concentration. The shortest processing time for a single analysis of typical atmospheric sample is 40 min. Precision values of isotopocule ratio analysis are