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Gewählte Publikation:

Barbini, S; Sriranganadane, D; Orozco, SE; Kabrelian, A; Karlstrom, K; Rosenau, T; Potthast, A.
(2021): Tools for Bark Biorefineries: Studies toward Improved Characterization of Lipophilic Lignocellulosic Extractives by Combining Supercritical Fluid and Gas Chromatography
ACS SUSTAIN CHEM ENG. 2021; 9(3): 1323-1332. FullText FullText_BOKU

Abstract:
The bark of trees contains an interesting mixture of bioactive compounds, or so-called extractives. The use of supercritical carbon dioxide (sc-CO2) eliminates both the need for organic solvents as extractants and the danger that solvent traces might compromise the purity of the extracts. Unfortunately, the complexity and natural variability of extracts' composition render any utilization attempts rather challenging. Thus, in order to implement exploitation concepts in a meaningful way, appropriate analytical techniques for characterizing extracts must be available beforehand. In our work, we explored gas chromatography coupled to both mass spectrometry and a flame ionization detector (GC-MS/FID), in combination with ultra-performance convergence chromatography and quadrupole time-of-flight mass spectrometry (UPC2-QTof-MS), for the characterization of bark extracts from pine (Pinus sylvestris L.) in both qualitative and quantitative terms. Although the conventional GC-MS/FID approach is a robust method for overall quantification of extractives, it fails to provide ample information about native sterol esters and triglycerides. These data are provided by a new, complementary analytical technique based on supercritical carbon dioxide, as the chromatographic eluant, coupled to a high-resolution mass spectrometer. The combination of both techniques and the use of sc-CO2 as both an extraction solvent and eluant made this combined tool especially powerful. The most prominent triglycerides in the extract were identified qualitatively and quantitatively, and the dominating sterol esters were identified qualitatively, by UPC2-QTof-MS.
Autor/innen der BOKU Wien:
Barbini Stefano
Kabrelian Armig
Potthast Antje
Rosenau Thomas
Sriranganadane Dev
BOKU Gendermonitor:


Find related publications in this database (Keywords)
Bark
Biorefinery
CO2 supercritical extraction
Nonpolar extractives
Quadrupole time-of-flight mass spectrometer
Gas chromatography
Softwood
Pinus sylvestris
Ultraperformance convergence chromatography


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