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Title: A "dual-acceptor channel" membraneless gas-diffusion unit for simultaneous determination of ethanol and acetaldehyde in liquors using reverse flow injection
Authors: Nathawut Choengchan
Bangerdsuk Poontong
Arjnarong Mathaweesansurn
Noppadol Maneerat
Shoji Motomizu
Nuanlaor Ratanawimarnwong
Duangjai Nacapricha
Okayama University
King Mongkut's Institute of Technology Ladkrabang
Mahidol University
Srinakharinwirot University
Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs.
Keywords: Chemistry
Issue Date: 1-Jan-2018
Citation: Analytical Sciences. Vol.34, No.2 (2018), 169-175
Abstract: © The Japan Society for Analytical Chemistry. A new design of membraneless gas-diffusion unit with dual acceptor channels for separation, collection and simultaneous determination of two volatile analytes in liquid sample is presented. The unit is comprised of three parallel channels in a closed module. A sample is aspirated into the central channel and two kinds of reagents are introduced into the other two channels. Two analytes are isolated from the sample matrix by diffusion into head-space and absorbed into the specific reagents. Non-absorbed vapor is released by opening the programmable controlled lid. The unit was applied to liquors for measurement of ethanol and acetaldehyde using reverse flow injection. Dichromate and nitroprusside were exploited as reagents for colorimetric detection of ethanol and acetaldehyde, respectively. Good linearity ranges (r2 > 0.99) with high precision (RSD < 2%) and high accuracy (recovery: 90 - 105%) were achieved. The results were compared to the results by GC-FID and no significant difference was observed by paired t-test (95% confidence).
ISSN: 13482246
Appears in Collections:Scopus 2018

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