Journal
ANALYTICA CHIMICA ACTA
Volume 969, Issue -, Pages 26-34Publisher
ELSEVIER
DOI: 10.1016/j.aca.2017.03.022
Keywords
Non-targeted analysis; Bio-oils; Petroleomic approach; Ultra-high resolution mass spectrometry
Categories
Funding
- European COST Action 1306 Lignoval
- TGIR program [FR 3624]
- CNRS
- Engineering and Physical Sciences Research Council [EP/K039717/1] Funding Source: researchfish
- EPSRC [EP/K039717/1] Funding Source: UKRI
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The comprehensive description of complex mixtures such as bio-oils is required to understand and improve the different processes involved during biological, environmental or industrial operation. In this context, we have to consider how different ionization sources can improve a non-targeted approach. Thus, the Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) has been coupled to electrospray ionization (ESI), laser desorption ionization (LDI) and atmospheric pressure photoionization (APPI) to characterize an oak pyrolysis bio-oil. Close to 90% of the all 4500 compound formulae has been attributed to CxHyOz with similar oxygen class compound distribution. Nevertheless, their relative abundance in respect with their double bound equivalent (DBE) value has evidenced significant differences depending on the ion source used. ESI has allowed compounds with low DBE but more oxygen atoms to be ionized. APPI has demonstrated the efficient ionization of less polar compounds (high DBE values and less oxygen atoms). The LDI behavior of bio-oils has been considered intermediate in terms of DBE and oxygen amounts but it has also been demonstrated that a significant part of the features are specifically detected by this ionization method. Thus, the complementarity of three different ionization sources has been successfully demonstrated for the exhaustive characterization by petroleomic approach of a complex mixture. (C) 2017 Elsevier B.V. All rights reserved.
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