Application of post-column reaction gas chromatography with a single reference gas for offshore air and gas seeped from the seafloor samples.

Autor: Kitamaki Y; National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8563, Japan. y-kitamaki@aist.go.jp., Aoki N; National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8563, Japan., Aoki S; Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8567, Japan., Ishida H; Marine Ecology Research Institute, 300 Iwawada, Onjuku-Machi, Isumi-Gun, Chiba, 299-5105, Japan., Suzumura M; Department of Energy and Environment, Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan.
Jazyk: angličtina
Zdroj: Analytical sciences : the international journal of the Japan Society for Analytical Chemistry [Anal Sci] 2023 Apr; Vol. 39 (4), pp. 619-623. Date of Electronic Publication: 2023 Feb 02.
DOI: 10.1007/s44211-023-00279-8
Abstrakt: Ambient air commonly contains carbon dioxide at concentrations greater than 400 µmol mol -1 and methane at ~ 2000 nmol mol -1 ; non-methane hydrocarbons are also widespread in the atmosphere at much lower concentrations. For quantification of various carbon-containing compounds in typical analytical instrument, corresponding number of reference materials are required. Therefore, the development of a method that uses a single reference material applicable to air monitoring is desired. Here, we examined a post-column reaction system combined with a gas chromatograph equipped with a flame ionization detector (FID), which involves oxidation and reduction processes after separation. To determine various carbon-containing gases by post-column reaction gas chromatography with FID (GC-r-FID) using a single reference, it is necessary to confirm a good linearity of the response with carbon concentrations originating from various carbon-containing gases. When mixtures of carbon-containing gases at three different concentrations and the calibration curve of the FID response with the concentration converted into methane were used, a single linear calibration curve (correlation coefficient > 0.9999, 18 points) was obtained over four orders of magnitudes (to ~ 5000 µmol mol -1 as methane). The applicability of GC-r-FID was confirmed by determining carbon-containing gases in air and gas seeped from the seafloor samples. Because the results were comparable to those obtained by conventional GC-FID and GC-thermal conductivity detector, typically GC-r-FID with a single reference gas should be suitable for air monitoring.
(© 2023. The Author(s), under exclusive licence to The Japan Society for Analytical Chemistry.)
Databáze: MEDLINE
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