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Author
Choengchan, N.
Mantim, T.
Wilairat, P.
Dasgupta, P. K.
Motomizu, Shoji
Nacapricha, D.
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.
Keywords
membraneless gas diffusion
flow injection
ethanol determination
liquor
spectrophotometry
Note
Published with permission from the copyright holder.
This is published in Analytica Chimica Acta, 2006 Vol.579 Issue.1 pp.33-37
Publisher URL: http://dx.doi.org/10.1016/j.aca.2006.07.018
Direct access to Thomson Web of Science record
(C)2006 by Elsevier B.V.
Published Date
2006-10-02
Publication Title
Analytica Chimica Acta
Volume
volume579
Issue
issue1
Publisher
Elsevier Science B.V.
Start Page
33
End Page
37
ISSN
0003-2670
NCID
AA00524834
Content Type
Journal Article
language
英語
Copyright Holders
Elsevier Science B.V.
File Version
author
Refereed
True
DOI
Web of Science KeyUT
Submission Path
analytical_chemistry/27