Cryogen-free automated gas chromatograph system for monitoring of halocarbons in the atmosphere at background concentration levels

被引：5

作者：

Toyoda, S ^{[1
]}

Tominaga, T ^{[1
]}

Makide, Y ^{[1
]}

机构：

[1] Univ Tokyo, Radioisotope Ctr, Tokyo 1130032, Japan

来源：

ANALYTICAL SCIENCES | 1998年 / 14卷 / 05期

关键词：

atmospheric concentration; continuous monitoring; halocarbon; chlorofluorocarbon; stratospheric ozone depletion; global warming; gas chromatography; electron capture detector; cryogen-free;

D O I：

10.2116/analsci.14.917

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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 halocarbon concentrations was carried out at 90-min intervals in the urban area.

引用

页码：917 / 923

页数：7

共 2 条

[1] Cryogen-Free Automated Gas Chromatograph System for Monitoring of Halocarbons in the Atmosphere at Background Concentration Levels
Sakae Toyoda
Takeshi Tominaga
Yoshihiro Makide
Analytical Sciences, 1998, 14 : 917 - 923
[2] THE USE OF AUTOMATED ON LINE GAS-CHROMATOGRAPHY FOR THE MONITORING OF ORGANIC TRACE GASES IN THE ATMOSPHERE AT LOW-LEVELS
RUDOLPH, J
JOHNEN, FJ
KHEDIM, A
PILWAT, G
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY, 1990, 38 (02) : 143 - 155

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