Publication: A membraneless gas diffusion unit: Design and its application to determination of ethanol in liquors by spectrophotometric flow injection
Issued Date
2006-10-02
Resource Type
ISSN
00032670
Other identifier(s)
2-s2.0-33748797933
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Analytica Chimica Acta. Vol.579, No.1 (2006), 33-37
Suggested Citation
N. Choengchan, T. Mantim, P. Wilairat, P. K. Dasgupta, S. Motomizu, D. Nacapricha A membraneless gas diffusion unit: Design and its application to determination of ethanol in liquors by spectrophotometric flow injection. Analytica Chimica Acta. Vol.579, No.1 (2006), 33-37. doi:10.1016/j.aca.2006.07.018 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/22964
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
A membraneless gas diffusion unit: Design and its application to determination of ethanol in liquors by spectrophotometric flow injection
Other Contributor(s)
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.