start-ver=1.4
cd-journal=joma
no-vol=579
cd-vols=
no-issue=1
article-no=
start-page=33
end-page=37
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2006
dt-pub=20061002
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=A membraneless gas diffusion unit: Design and its application to determination of ethanol in liquors by spectrophotometric flow injection
en-subtitle=
kn-subtitle=
en-abstract=
kn-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.
en-copyright=
kn-copyright=

en-aut-name=ChoengchanN.
en-aut-sei=Choengchan
en-aut-mei=N.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=MantimT.
en-aut-sei=Mantim
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=WilairatP.
en-aut-sei=Wilairat
en-aut-mei=P.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=DasguptaP. K.
en-aut-sei=Dasgupta
en-aut-mei=P. K.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=MotomizuShoji
en-aut-sei=Motomizu
en-aut-mei=Shoji
kn-aut-name=本水昌二
kn-aut-sei=本水
kn-aut-mei=昌二
aut-affil-num=5
ORCID=

en-aut-name=NacaprichaD.
en-aut-sei=Nacapricha
en-aut-mei=D.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

affil-num=1
en-affil=
kn-affil=Flow Innovation-Research for Science and Technology Laboratories, Department of Chemistry, Faculty of Science, Mahidol University

affil-num=2
en-affil=
kn-affil=Flow Innovation-Research for Science and Technology Laboratories, Department of Chemistry, Faculty of Science, Mahidol University

affil-num=3
en-affil=
kn-affil=Flow Innovation-Research for Science and Technology Laboratories, Department of Chemistry, Faculty of Science, Mahidol University

affil-num=4
en-affil=
kn-affil=Department of Chemistry and Biochemistry, Texas Tech University

affil-num=5
en-affil=
kn-affil=Department of Chemistry, Faculty of Science, Okayama University

affil-num=6
en-affil=
kn-affil=Flow Innovation-Research for Science and Technology Laboratories, Department of Chemistry, Faculty of Science, Mahidol University
en-keyword=membraneless gas diffusion
kn-keyword=membraneless gas diffusion
en-keyword=flow injection
kn-keyword=flow injection
en-keyword=ethanol determination
kn-keyword=ethanol determination
en-keyword=liquor
kn-keyword=liquor
en-keyword=spectrophotometry
kn-keyword=spectrophotometry
END