Development of Micro Gas Analysis System and Its Applications to Environmental Analysis

• TODA Kei

  Department of Chemistry, Kumamoto University

Bibliographic Information

Other Title

• マイクロガス分析システムの開発と環境分析への応用
• マイクロガス ブンセキ システム ノ カイハツ ト カンキョウ ブンセキ エ ノ オウヨウ

Abstract

Micro gas analysis system (μGAS) was developed to monitor atmospheric chemical compounds and gases anthropogenically emitted from industries. While there is still no simple and highly sensitive instrument for most of the water-soluble gases, in these works portable and continuous monitoring systems were developed for these gases. A key device was a microchannel scrubber, which has a 20000-times higher collection/preconcentration efficiency compared to a conventional impinger. This allows us to achieve both high sensitivity and high time resolution. Other important techniques were also developed, such as novel liquid handling, miniature reactors, miniature detectors, and gas generator for on-site calibration. The μGAS enables us to measure SO₂, H₂S, CH₃SH, COS, NO, NO₂, HONO, HCHO, NH₃ and so on at ppbv levels. Urban environment, forest air, volcanic gases, and gases emitted from soils were analyzed using μGAS, and interesting data were presented, such as localized polluted gases. Also, μGAS was useful for investigations of atmospheric chemistries. The most difficult analytical target among the above-mentioned gases was nitric oxide, NO, because NO is not water soluble, but monitoring of NO in breath air was successful with μGAS. A spreadsheet was developed to simulate the collection efficiency, and was utilized to design channel scrubbers. Thus, the developed channel device was applied to separate gaseous and particulate HCHO, and HCHO was found in particulate matter. The partitioning of HCHO between the gas phase and particulate matter was first investigated.

Journal

• BUNSEKI KAGAKU

  BUNSEKI KAGAKU 63 (11), 873-883, 2014

  The Japan Society for Analytical Chemistry

Keywords

• micro gas analysis system (μGAS)
• on-site analysis
• flow control
• micro detector
• breath
• odor analysis
• air pollution monitorin

Details

• CRID: 1390001204661334784
• NII Article ID: 130004712995
• NII Book ID: AN00222633
• DOI: 10.2116/bunsekikagaku.63.873
• NDL BIB ID: 025912946
• ISSN: 05251931
• Web Site: http://hdl.handle.net/2298/33001
• Web Site: http://id.ndl.go.jp/bib/025912946
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025912946
• Web Site: https://www.jstage.jst.go.jp/article/bunsekikagaku/63/11/63_873/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed