Cryogen-Free Automated Gas Chromatograph System for Monitoring of Halocarbons in the Atmosphere at Background Concentration Levels.
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- TOYODA Sakae
- Radioisotope Center, The University of Tokyo
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- TOMINAGA Takeshi
- Radioisotope Center, The University of Tokyo
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- MAKIDE Yoshihiro
- Radioisotope Center, The University of Tokyo
Bibliographic Information
- Other Title
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- Cryogen-Free Automated Gas Chromatograp
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Abstract
An automated gas chromatograph/electron capture detector (GC/ECD) system is developed for the monitoring of major seven halocarbons in the atmosphere (CCl2F2: CFC-12, CCl3F: CFC-11, CCl2FCClF2: CFC-113, CH3CCl3, CCl4, CHCl=CCl2, and CCl2=CCl2) at the tropospheric background concentration levels. By using two columns in series for each of two groups divided by the volatility of the compounds, the system requires neither cryogen for preconcentration nor any physical/chemical dryer for water removing. A sample amount of ca.18 ml STP is sufficient to detect these species, and analysis of sub-ambient atmospheric-pressure sample in a canister is also possible. Monitoring of these halo-carbon concentrations was carried out at 90-min intervals in the urban area.
Journal
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- Analytical Sciences
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Analytical Sciences 14 (5), 917-923, 1998
The Japan Society for Analytical Chemistry
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Details 詳細情報について
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- CRID
- 1390282679235037312
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- NII Article ID
- 10002417230
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- NII Book ID
- AA10500785
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- COI
- 1:CAS:528:DyaK1cXmslWqurk%3D
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- ISSN
- 13482246
- 09106340
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- NDL BIB ID
- 4576988
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed