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- Day 3, May 17（Thu.） 15:05-15:25 Room C (Seiun 2)
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3C-O2-M-1505 PDF
Development of multi-turn time-of-flight mass spectrometer system for the simultaneous and continuous measurement of multiple soil gases
Soil is one of the major sources of greenhouse gases, such as nitrous oxide (N2O) and methane (CH4), and carbon dioxide (CO2). These soil gases, including N2 and O2 are generated and consumed through microbial activity in soil and thus behaviors of these biological gases are inter-connected each other. It is desired for better global flux estimation to unveil the factors that affect emission and/or consumption of these gases through the simultaneous measurement and comparison of multiple soil gases. In this study, a multi-turn time-of-flight mass spectrometer system combined with an automated gas flux chamber measurement system was developed for the simultaneous and continuous quantification of soil gases in few minutes. As first attempt, concentrations of ambient-level of N2O (~330 ppbv) and CO2 (~400 ppmv) were quantitatively monitored in a soil incubation experiment.