日本質量分析学会 第67回質量分析総合討論会

Abstract

Oral Sessions

Day 1, May 15(Wed.) 15:25-15:45 Room D (202)

Real Time Monitoring of N2O, CO2 and CH4 Emitted from Agricultural Soils Using a Portable Multi-Turn Time-of-Flight Mass Spectrometer

(1Osaka Univ., 2Osaka Univ., 3Ehime Univ., 4Osaka Univ., 5Hokkaido Univ.)
oNoriko Nakayama1, Yusuke Iwai2, Yo Toma3, Hiroshi Furutani4, Ryusuke Hatano5, Michisato Toyoda1

Soil is one of the major sources of greenhouse gases, such as nitrous oxide (N2O), methane (CH4), and carbon dioxide (CO2), which gases are both generated and consumed during microbial processes in soil. Understanding the soil biological processes and their responses to environmental variations are quite important for better global flux estimation and a simultaneous and continuous monitoring of these soil gases should provide the better understanding. In this study, a multi-turn time-of-flight mass spectrometer (MULTUM) system combined with an automated gas flux chamber system was developed for the simultaneous and continuous quantification of soil gases in a few minutes. To demonstrate the utility of the system, we conducted a field study at the Ehime University farm (Ehime, Japan). Hourly continuous flux measurement had been continued for a week almost without operators except for a daily system check, which enabled collection of large number of continuous soil gas measurements with substantially reduced labor compared to traditional methods.