| Micro gas analysis system for measurement of atmospheric hydrogen sulfide and sulfur dioxide. | |
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MedLine Citation:
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PMID: 16286968 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A honeycomb structure microchannel scrubber was developed to achieve efficient and stable gas collection. A thin porous membrane was pasted on a microchannel by the adhesive force of a fresh polydimethylsiloxane surface. The microchannel scrubber achieved much more efficient gas collection than conventional impingers and diffusion scrubbers. Two sets of the microchannel scrubbers and detectors were integrated in a 10 cm x 9 cm plastic board to create a micro gas analysis system (microGAS) for simultaneous measurements of H2S and SO2. The whole system including a battery was incorporated in a carrying case 34 cm W x 16 cm D x 17 cm H for use in the field. Liquid flows at 30 microl min(-1) were obtained by bimetal micropumps. The estimated detection limits were 0.1 ppbv for H2S and 1 ppbv for SO2. The system was demonstrated for real atmospheric gas analysis, and the results agreed well with data concurrently obtained by ion chromatography coupled with a cylindrical diffusion scrubber. The system we developed allowed automated continuous analyses in the field and achieved a much higher time resolution compared to those by ion chromatographic analysis. |
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Authors:
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Shin-Ichi Ohira; Kei Toda |
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Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't Date: 2005-11-02 |
Journal Detail:
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Title: Lab on a chip Volume: 5 ISSN: 1473-0197 ISO Abbreviation: Lab Chip Publication Date: 2005 Dec |
Date Detail:
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Created Date: 2005-11-15 Completed Date: 2006-01-19 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 101128948 Medline TA: Lab Chip Country: England |
Other Details:
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Languages: eng Pagination: 1374-9 Citation Subset: IM |
Affiliation:
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Department of Science, Kumamoto University, 2-39-1, Kurokami, Kumamoto, 860-8555, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Air Pollutants
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analysis*,
chemistry Atmosphere / analysis*, chemistry Electrochemistry / instrumentation*, methods Electrodes Environmental Monitoring / instrumentation*, methods Equipment Design Equipment Failure Analysis Flow Injection Analysis / instrumentation*, methods Gases / analysis, chemistry Hydrogen Sulfide / analysis*, chemistry Membranes, Artificial Microchemistry / instrumentation, methods Microfluidics / instrumentation*, methods Miniaturization Sulfur Dioxide / analysis, chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Air Pollutants; 0/Gases; 0/Membranes, Artificial; 7446-09-5/Sulfur Dioxide; 7783-06-4/Hydrogen Sulfide |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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