Electrospun Fibers for Solid-Phase Microextraction

Electrospun Fibers for Solid-Phase Microextraction

Bibliographic Details
Main Author: Zewe, Joseph William
Language:English
Published: The Ohio State University / OhioLINK 2010
Subjects:
Analytical Chemistry
Chemistry
solid-phase microextraction
electrospinning
separation science
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=osu1276695549
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-osu12766955492021-08-03T06:00:01Z Electrospun Fibers for Solid-Phase Microextraction Zewe, Joseph William Analytical Chemistry Chemistry solid-phase microextraction electrospinning separation science A method of producing solid phase microextraction (SPME) fibers based on electrospinning polymers into nanofibrous mats is demonstrated. Using this method the polymer mat is attached to a stainless steel wire without the need of a binder. While applicable to any polymer that can be electrospun, SU-8 2100, a polymeric negative photoresist, is used for this initial study. SPME devices comprised of carbon nanofibers are also illustrated by pyrolizing SU-8 to produce amorphous carbon. Nonpolar compounds, benzene, toluene, ethylbenzene, and o-xylene (BTEX) and polar compounds, phenol, 4-chlorophenol and 4-nitrophenol are extracted under headspace SPME conditions. Extraction efficiencies are compared to commercial polydimethylsiloxane (PDMS), polydimethylsiloxane/divinylbenzene (PDMS/DVB) and polyacrylate (PA) fibers. For both the nonpolar and polar compounds, the carbon nanofiber based phases demonstrated enhanced or comparable (o-xylene only) extraction efficiencies. Distribution constants, K, for benzene on the electronspun fibers are of similar magnitude to those of the compared commercial fibers and increase with carbonization temperature. Finally, the measured detection limits for all the organic compounds are similar to those measured with other SPME GC-FID methods. However, the linear dynamic range of the analysis was larger than that found for the commercial fibers. 2010-09-09 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1276695549 http://rave.ohiolink.edu/etdc/view?acc_num=osu1276695549 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Analytical Chemistry
Chemistry
solid-phase microextraction
electrospinning
separation science
spellingShingle Analytical Chemistry
Chemistry
solid-phase microextraction
electrospinning
separation science
Zewe, Joseph William
Electrospun Fibers for Solid-Phase Microextraction
author Zewe, Joseph William
author_facet Zewe, Joseph William
author_sort Zewe, Joseph William
title Electrospun Fibers for Solid-Phase Microextraction
title_short Electrospun Fibers for Solid-Phase Microextraction
title_full Electrospun Fibers for Solid-Phase Microextraction
title_fullStr Electrospun Fibers for Solid-Phase Microextraction
title_full_unstemmed Electrospun Fibers for Solid-Phase Microextraction
title_sort electrospun fibers for solid-phase microextraction
publisher The Ohio State University / OhioLINK
publishDate 2010
url http://rave.ohiolink.edu/etdc/view?acc_num=osu1276695549
work_keys_str_mv AT zewejosephwilliam electrospunfibersforsolidphasemicroextraction
_version_ 1719429151690063872

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