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Article
Bio-oil Analysis Using Negative Electrospray Ionization: Comparative Study of High-Resolution Mass Spectrometers and Phenolic versus Sugaric Components
Energy & Fuels
  • Erica A. Smith, Iowa State University
  • Soojin Park, Iowa State University
  • Adam T. Klein, Iowa State University
  • Young Jin Lee, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
5-16-2012
DOI
10.1021/ef3003558
Abstract

We have previously demonstrated that a petroleomic analysis could be performed for bio-oils and revealed the complex nature of bio-oils for the nonvolatile phenolic compounds (Smith, E.;Lee, Y. J. Energy Fuels 2010, 24, 5190−5198). As a subsequent study, we have adapted electrospray ionization in negative-ion mode to characterize a wide variety of bio-oil compounds. A comparative study of three common high-resolution mass spectrometers was performed to validate the methodology and to investigate the differences in mass discrimination and resolution. The mass spectrum is dominated by low mass compounds with m/z of 100–250, with some compounds being analyzable by gas chromatography–mass spectrometry (GC–MS). We could characterize over 800 chemical compositions, with only about 40 of them being previously known in GC–MS. This unveiled a much more complex nature of bio-oils than typically shown by GC–MS. The pyrolysis products of cellulose and hemicellulose, particularly polyhydroxy cyclic hydrocarbons (or what we call “sugaric” compounds), such as levoglucosan, could be effectively characterized with this approach. Phenolic compounds from lignin pyrolysis could be clearly distinguished in a contour map of double bond equivalent (DBE) versus the number of carbons from these sugaric compounds.

Comments

Reprinted (adapted) with permission from Energy & Fuels 26 (2012): 3796, doi: 10.1021/ef3003558. Copyright 2012 American Chemical Society.

Copyright Owner
American Chemical Society
Language
en
File Format
application/pdf
Citation Information
Erica A. Smith, Soojin Park, Adam T. Klein and Young Jin Lee. "Bio-oil Analysis Using Negative Electrospray Ionization: Comparative Study of High-Resolution Mass Spectrometers and Phenolic versus Sugaric Components" Energy & Fuels Vol. 26 Iss. 6 (2012) p. 3796 - 3802
Available at: http://works.bepress.com/youngjin-lee/16/