Abstract. The precise measurement of the amount fraction of atmospheric nitrous oxide (N₂O) is required to understand global emission trends. Analysis of the site-specific stable isotopic composition of N₂O provides a means to differentiate emission sources. The availability of accurate reference materials of known N₂O amount fractions and isotopic composition is critical for achieving these goals. We present the development of nitrous oxide gas reference materials for underpinning measurements of atmospheric composition and isotope ratio. Uncertainties target the World Metrological Organisation Global Atmosphere Watch (WMO-GAW) compatibility goal of 0.1 nmol mol⁻¹ and extended compatibility goal of 0.3 nmol mol⁻¹, for atmospheric N₂O measurements in an amount fraction range of 325–335 nmol mol⁻¹. We also demonstrate the stability of amount fraction and isotope ratio of these reference materials and present a characterisation study of the cavity ring down spectrometer used for analysis of the reference materials.

中文翻译：

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用于稳定测量一氧化二氮稳定气氛的气体参考材料

摘要。需要精确测量大气中一氧化二氮（N ₂ O）含量的比例，以了解全球排放趋势。N ₂ O的特定于位点的稳定同位素组成的分析提供了一种区分排放源的方法。提供已知N ₂ O含量分数和同位素组成的准确参考材料对于实现这些目标至关重要。我们介绍了用于支持大气成分和同位素比测量的一氧化二氮气体参考材料的开发。不确定性的目标是世界计量组织全球大气监视网（WMO-GAW）的相容性目标为0.1 nmol mol ^-1和扩展的相容性目标为0.3 nmol mol^-1，用于大气N ₂ O的测量，其量分数范围为325–335 nmol mol ^-1。我们还证明了这些参考物质的含量分数和同位素比的稳定性，并提供了用于分析参考物质的腔衰荡光谱仪的表征研究。