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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/22964
Title: A membraneless gas diffusion unit: Design and its application to determination of ethanol in liquors by spectrophotometric flow injection
Authors: N. Choengchan
T. Mantim
P. Wilairat
P. K. Dasgupta
S. Motomizu
D. Nacapricha
Mahidol University
Okayama University
Texas Tech University at Lubbock
Keywords: Biochemistry, Genetics and Molecular Biology;Chemistry;Environmental Science
Issue Date: 2-Oct-2006
Citation: Analytica Chimica Acta. Vol.579, No.1 (2006), 33-37
Abstract: This work presents new design of a gas diffusion unit, called 'membraneless gas diffusion (MGD) unit', which, unlike a conventional gas diffusion (GD) unit, allows selective detection of volatile compounds to be made without the need of a hydrophobic membrane. A flow injection method was developed employing the MGD unit to determine ethanol in alcoholic drinks based on the reduction of dichromate by ethanol vapor. Results clearly demonstrated that the MGD unit was suitable for determination of ethanol in beer, wine and distilled liquors. Detection limit (3S/N) of MGD unit was lower than the GD unit (GD: 0.68%, v/v; MGD: 0.27%, v/v). The MGD design makes the system more sensitive as mass transfer is more efficient than that of GD and thus, MGD can perfectly replace membrane-based designs. © 2006 Elsevier B.V. All rights reserved.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33748797933&origin=inward
http://repository.li.mahidol.ac.th/dspace/handle/123456789/22964
ISSN: 00032670
Appears in Collections:Scopus 2006-2010

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