Methodological Comparison between a Novel Automatic Sampling System for Gas Chromatography versus Photoacoustic Spectroscopy for Measuring Greenhouse Gas Emissions under Field Conditions.
Methodological Comparison between a Novel Automatic Sampling System for Gas Chromatography versus Photoacoustic Spectroscopy for Measuring Greenhouse Gas Emissions under Field Conditions.
复制标题
DOI：
10.3390/s16101638
复制
发表时间：
2016-10-03
期刊：
影响因子：
--
通讯作者：
Büscher W
中科院分区：
文献类型：
--
作者：
Schmithausen AJ;Trimborn M;Büscher W
一氧化二氮(N2O)、甲烷(CH4)和二氧化碳(CO2)等痕量气体是与气候有关的气体，它们从农用牲畜牛舍排放出来的排放量不容忽视。该领域的常规测量系统(傅里叶变换红外光谱(FTIR)；光声系统(PAS))对N2O不够敏感。基于激光的测量系统具有很高的精确度，但它们的购买和维护非常昂贵。一种经济有效的替代方法是带有电子捕获检测(ECD)的气相色谱(GC)，但由于辐射，这不适合现场应用。随后在实验室中自动测量在野外条件下采集的样品面临许多挑战。这项研究提出了一种抽样，旨在促进在野外条件下采样的N2O浓度的实验室分析。在现场使用PAS(在线系统)和在实验室(离线系统)使用GC进行分析。两个测量系统都显示了甲烷和二氧化碳浓度的良好相关性。测得的N2O浓度接近对苯二甲酸的检测限。在很低的浓度范围内，GC对N2O的测定结果更为可靠。
Trace gases such as nitrous oxide (N2O), methane (CH4), and carbon dioxide (CO2) are climate-related gases, and their emissions from agricultural livestock barns are not negligible. Conventional measurement systems in the field (Fourier transform infrared spectroscopy (FTIR); photoacoustic system (PAS)) are not sufficiently sensitive to N2O. Laser-based measurement systems are highly accurate, but they are very expensive to purchase and maintain. One cost-effective alternative is gas chromatography (GC) with electron capture detection (ECD), but this is not suitable for field applications due to radiation. Measuring samples collected automatically under field conditions in the laboratory at a subsequent time presents many challenges. This study presents a sampling designed to promote laboratory analysis of N2O concentrations sampled under field conditions. Analyses were carried out using PAS in the field (online system) and GC in the laboratory (offline system). Both measurement systems showed a good correlation for CH4 and CO2 concentrations. Measured N2O concentrations were near the detection limit for PAS. GC achieved more reliable results for N2O in very low concentration ranges.
登录
查看更多内容
影响因子：
5
作者：
Wu, Wentao;Zhang, Guoqiang;Kai, Peter
通讯作者：
Kai, Peter
影响因子：
5
作者：
Cortus, Erin L.;Jacobson, Larry D.;Bogan, Bill W.
通讯作者：
Bogan, Bill W.
影响因子：
3
作者：
Place, Sara E.;Pan, Yuee;Mitloehner, Frank M.
通讯作者：
Mitloehner, Frank M.
影响因子：
2.4
作者：
Wulf, S;Maeting, M;Clemens, J
通讯作者：
Clemens, J
影响因子：
5.1
作者：
Ngwabie, N. M.;Jeppsson, K. -H.;Gustafsson, G.
通讯作者：
Gustafsson, G.