ID | 33033 |
FullText URL | |
Author |
Muncharoen, Sasithorn
Sitanurak, Jirayu
Tiyapongpattana, Warawut
Choengchan, Nathawut
Ratanawimarnwong, Nuanlaor
Motomizu, Shoji
Wilairat, Prapin
Nacapricha, Duangjai
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Abstract | This work describes the development of a new spectrophotometric flow technique suitable for monitoring of ethanol content in gasohol fuel. Membraneless gas-diffusion (MBL-GD) was applied with one-step aqueous extraction of gasohol (1:2 gasohol/water). Segments of aqueous extract and color developing reagent were allowed to flow into two separate channels in the MBL-GD device. Inside the device, ethanol vapor can diffuse across a small headspace between the two channels (donor and acceptor). Introduction of an air-segment behind the zone of acceptor reagent to stop dispersion of the colored zone greatly improves the rapidity of analysis using this MBL-GD technique. Two methods were developed for quality control of gasohol by measuring ethanol content. Method I is suitable for direct calibration of E5 and E10. Method II is recommended for E20. These methods have high accuracy with good precision (% RSD: 1 to 4.9, n = 45) and have a sample throughput of 26 samples per hour. E10 samples were compared with analysis using a standard GC method. |
Keywords | embraneless gas diffusion
Flow-based
Ethanol
Gasohol
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Note | Published with permission from the copyright holder.
This is published in Microchimica Acta, 2008 online first Publisher URL: http://dx.doi.org/10.1007/s00604-008-0058-6 (C)2008 by Springer |
Published Date | 2008-05-17
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Publication Title |
Microchimica Acta
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Volume | volume164
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Issue | issue1
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Publisher | Springer Vienna
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Start Page | 203
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End Page | 210
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ISSN | 0026-3672
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NCID | AA00738769
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Content Type |
Journal Article
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language |
English
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Refereed |
True
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DOI | |
Web of Science KeyUT | |
Submission Path | analytical_chemistry/49
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