A fully automatic system for underway N2O measurements based on cavity ring-down spectroscopy
A fully automatic system for underway N2O measurements based on cavity ring-down spectroscopy
复制标题
基于腔衰荡光谱的全自动 N2O 测量系统
DOI：
10.1080/03067319.2018.1499902
复制
发表时间：
2018-06
影响因子：
2.6
通讯作者：
Chen Liqi
中科院分区：
文献类型：
--
作者：
Liyang Zhan;Jixia Zhang;Yuhong Li;Man Wu;Jian Liu;Qi Lin;Chen Liqi
摘要N2 O是最重要的温室气体和臭氧消耗气体之一，近年来一直受到人们的关注。海洋约占全球N2 O排放总量的1/4，但海洋N2 O源/汇特征尚不清楚。为了加强海洋N2 O源/汇特性的研究，我们的实验室开发了一个全自动的海洋表面水N2 O浓度和大气N2 O摩尔分数测量系统，包括一个光腔衰荡光谱（CRDS）仪器和一个上游装置。开发的装置可以编程切换CRDS测量从平衡的顶部空间的大气样品和参考气体样品。地表水N2 O浓度由平衡液中的平衡顶空N2 O摩尔分数计算。该平衡的响应时间为~ 3.4 min，该方法用于地表水N2 O测量的估计精密度优于0.5%（相对标准偏差，RSD），比传统的气相色谱方法好一个数量级，并可进一步优化。每20 s采集一次数据，该系统的校准频率要求约为7-10天。该系统是高精度和高分辨率测量大气和海洋N2 O的有力工具，可以显着改善海洋N2 O源/汇特征及其对气候变化响应的研究。
ABSTRACT N2O is one of the most important greenhouse and ozone-depleting gases and has been the source of considerable concern in recent years. The oceans account for ~ 1/4 of the global N2O emission budget; however, the oceanic N2O source/sink characteristics are not well understood. To enhance the study of oceanic N2O source/sink characteristics, our laboratory developed a fully automatic underway system for surface water N2O concentration and atmospheric N2O mole fraction measurements consisting of a cavity ring-down spectroscopy (CRDS) instrument and an upstream device. The developed device can be programmed to switch the CRDS measurements from the equilibrator headspace to the atmospheric sample and the reference gas sample. The surface water N2O concentration is calculated from the equilibrium headspace N2O mole fraction in the equilibrator. The response time of this equilibrator is ~ 3.4 min, and the estimated precision of this method for surface water N2O measurements is better than 0.5% (relative standard deviation, RSD), which is one order of magnitude better than that of traditional gas chromatographic methods and can be further optimised. Data are acquired every 20 s, and the calibration frequency requirement of this system is approximately 7–10 days. This labor-saving underway system is a powerful tool for high-precision and high-resolution measurements of atmospheric and oceanic N2O and can significantly improve the study of the characteristics of oceanic N2O sources/sinks and their response to climate change.
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DOI：
10.1111/j.2153-3490.1974.tb01962.x
发表时间：
1974-02
期刊：
Tellus A
影响因子：
--
作者：
J. Hahn
通讯作者：
J. Hahn
DOI：
10.1007/978-981-33-6084-6_11
发表时间：
2021
期刊：
Modern Techniques of Spectroscopy
影响因子：
--
作者：
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通讯作者：
Abhijit Maity;Mithun Pal;M. Pradhan
影响因子：
2.7
作者：
Erler, D. V.;Duncan, T. M.;Eyre, B. D.
通讯作者：
Eyre, B. D.
影响因子：
3
作者：
T. Yoshinari
通讯作者：
T. Yoshinari
影响因子：
3.2
作者：
Arevalo-Martinez, D. L.;Beyer, M.;Bange, H. W.
通讯作者：
Bange, H. W.