Automated gas chromatographic system for rapid analysis of the atmospheric trace gases methane, carbon dioxide, and nitrous oxide
Automated gas chromatographic system for rapid analysis of the atmospheric trace gases methane, carbon dioxide, and nitrous oxide
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DOI：
10.2134/jeq1997.00472425002600020030x
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发表时间：
1997-03-01
影响因子：
2.4
通讯作者：
Beese, F
中科院分区：
文献类型：
--
作者：
Loftfield, N;Flessa, H;Beese, F
为了研究辐射活性痕量气体CH4、CO2和N2O的通量，开发了一种气体采样和分析装置。它是一种在现场进行精确气体采样的有用工具，并可在实验室中对气体样品进行后续全自动分析。计算机控制的分析系统由配备有火焰离子化检测器（FID）、电子捕获检测器（ECD）和可容纳64个样品容器的压力控制自动进样器的气相色谱仪组成。该系统可自动进样，分析每个样品中的CH4、CO2和N2O，并随后排空样品容器。它配备了第二个替代样品入口，用于手动注射器进样。该入口适用于分析小体积气体样品（3 mL）。现场使用的气体取样系统由带特氟隆旋塞的抽真空样品瓶（100 mL）和带压力传感器的小型电池驱动现场取样器组成。该装置能够在取样和吹扫取样器感应管与样品容器之间的死体积期间现场控制样品瓶的真空完整性。
To study the fluxes of the radiative active trace gases CH4, CO2, and N2O, a gas sampling and analytical device was developed. It is a useful tool for accurate gas sampling in the field and enables the subsequent fully automated analysis of the gas samples in the laboratory. The computer-controlled analytical system consists of a gas chromatograph equipped with a flame ionization detector (FID), an electron capture detector (ECD), and a pressure-controlled autosampler for 64 sample containers. The system automates sample injection, the analysis of CH4, CO2, and N2O in each sample and the subsequent evacuation of the sample containers. It is equipped with a second alternative sample inlet for manual syringe injection. This inlet is suitable for analyzing small volumes of gas samples (3 mL). The gas sampling system for use in the field consists of evacuated sample bottles (100 mL) with Teflon cocks combined with a small battery-driven field sampler with a pressure sensor. This device enables an on-site control of the vacuum integrity of the sample bottles during sampling and purging of the dead volumes between the sampler induction pipe and the sample container.