Characterization of Pinus nigra var. laricio Maire bark extracts at the analytical and pilot scale

Bianchi, Sauro; Zikeli, Florian; Vinciguerra, Vittorio; Kroslakova, Ivana; Mayer, Ingo; Pichelin, Frédéric; Matteucci, Giorgio (2018). Characterization of Pinus nigra var. laricio Maire bark extracts at the analytical and pilot scale Holzforschung, 73(4), pp. 353-361. De Gruyter 10.1515/hf-2018-0105

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Pinus nigra var. laricio bark and its hot-water extracts (HWE) obtained at an analytical and pilot plant scale have been characterized in terms of phenolic extractives, condensed tannins (CTs), carbohydrates and inorganic compounds. Analytical extractions with aqueous acetone were also performed for comparison with HWE. The bark contains 35.5 g kg−1 CT, and two-thirds of it could be extracted. Analytical HWE at 75°C led to a total yield of 56.4 g kg−1. The extracts are mainly composed of phenolic compounds (50.7%) and pectins (19.7%). CTs amount to 17.9% of the extracts and are procyanidins with a mean degree of polymerization (DP) of about 9. Non-tannin phenolic oligomers also occurred in the extracts, which could be identified by pyrolysis gas chromatography mass spectrometry (Py-GC/MS) as lignin fragments. Matrix-assisted laser desorption/ionization-time-of-flight-mass spectrometry (MALDI-TOF MS) revealed that the CT is a flavanol derivative in methylated form. Further characterization and tailoring of the HWE properties is needed in the context of their specific application.

Item Type:

Journal Article (Original Article)

Division/Institute:

BFH Zentren > BFH Zentrum Holz - Ressource und Werkstoff
Department of Architecture, Wood and Civil Engineering
Department of Architecture, Wood and Civil Engineering > Bereich Forschung & Entwicklung, Dienstleistungen und Weiterbildung
Department of Architecture, Wood and Civil Engineering > Bereich Forschung & Entwicklung, Dienstleistungen und Weiterbildung > Institut für Werkstoffe und Holztechnologie

Name:

Bianchi, Sauro; Zikeli, Florian; Vinciguerra, Vittorio; Kroslakova, Ivana; Mayer, Ingo; Pichelin, Frédéric and Matteucci, Giorgio

Subjects:

Q Science > Q Science (General)
T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology

ISSN:

1437-434X

Publisher:

De Gruyter

Language:

English

Submitter:

Christelle Ganne-Chédeville

Date Deposited:

10 Dec 2019 12:11

Last Modified:

10 Dec 2019 12:11

Publisher DOI:

10.1515/hf-2018-0105

Uncontrolled Keywords:

acetone extractions bark extractives carbohydrates condensed tannins hot-water extractions MALDI-TOF MS Pinus nigra var. laricio Py-GC/MS pectins softwood bark thiolysis

ARBOR DOI:

10.24451/arbor.8879

URI:

https://arbor.bfh.ch/id/eprint/8879

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