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http://dx.doi.org/10.7850/jkso.2007.12.3.244

Dissolved Methane Measurements in Seawater and Sediment Porewater Using Membrane Inlet Mass Spectrometer (MIMS) System  

An, Soon-Mo (Division of Earth Environmental System/Marine Science Major, Pusan National University)
Kwon, Ji-Nam (Division of Earth Environmental System/Marine Science Major, Pusan National University)
Lim, Jea-Hyun (Division of Earth Environmental System/Marine Science Major, Pusan National University)
Park, Yun-Jung (Department of microbiology, Pukyung National University)
Kang, Dong-Jin (School of Earth & Environmental Sciences/Research Institute of Oceanography, Seoul National University)
Publication Information
The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY / v.12, no.3, 2007 , pp. 244-250 More about this Journal
Abstract
Membrane inlet mass spectrometer (MIMS) has been used to accurately quantify dissolved gases in liquid samples. In this study, the MIMS system was applied to measure dissolved methane in seawater and sediment porewater. To evaluate the accuracy of the measurement, liquid samples saturated with different methane partial pressure were prepared and the methane concentrations were quantified with the MIMS system. The measured values correspond well with the expected values calculated from solubility constants. The standard error of the measurements were $0.13{\sim}0.9%$ of the mean values. The distribution of dissolved methane concentration in seawater of the South Sea of Korea revealed that the physical parameters primarily control the methane concentration in sea water. The MIMS system was effective to resolve the small dissolved methane difference among water masses. The probe type inlet in MIMS system was proven to be effective to measure porewater methane concentration.
Keywords
Methane; MIMS; Dissolved Gas; Porewater; Methane Hydrate; Probe;
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