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Electrospun Fibers for Solid-Phase Microextraction

Zewe, Joseph William

Abstract Details

2010, Master of Science, Ohio State University, Chemistry.
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.
Susan Olesik, PhD (Advisor)
Philip Grandinetti, PhD (Committee Member)
87 p.

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Citations

  • Zewe, J. W. (2010). Electrospun Fibers for Solid-Phase Microextraction [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276695549

    APA Style (7th edition)

  • Zewe, Joseph. Electrospun Fibers for Solid-Phase Microextraction. 2010. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1276695549.

    MLA Style (8th edition)

  • Zewe, Joseph. "Electrospun Fibers for Solid-Phase Microextraction." Master's thesis, Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276695549

    Chicago Manual of Style (17th edition)