English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/209573
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Appraisal of analytical pyrolysis for direct compound specific isotope analysis (δ2H, δ13C Py-CSIA) of wood.

AuthorsSan Emeterio, Layla M. ; Jiménez Morillo, N. T. ; Rosa Arranz, José M. de la ; González-Vila, Francisco Javier ; Reina, Luis C.; Menéndez, M. P.; Vinciguerra, Vittorio; González-Pérez, José Antonio
Issue Date26-Jun-2019
PublisherUniversity of Bristol
Citation15th meeting of the Stable Isotope Mass Spectrometry Users Group (SIMSUG2019) Póster 12 (2019)
AbstractChanges in climatic and environmental conditions can affect both, plant chemical and isotope composition. Most studies use bulk isotope values, which represent a weighed mean average of the different plant compounds. An isotopic characterization of individual biogeochemical compounds is needed in order to differentiate the isotopic composition of the main plant components i.e. polysaccharides, lignin, polypeptides, lipids and waxes, etc. Here, we investigate the link between molecular and isotope composition of bark from three Eucalyptus species (E. grandis, E. dunni and a hybrid E. grandis x E. dunni) using Py-CSIA. Bulk samples and lignin extracted were analysed by Py-CSIA; this technique, although not widely used, has been previously developed and applied, with different variants, to characterize plant products. Isotopic measurements were normalized to the accepted scale using a n-alkanes mixture, type B, containing 15 dissolved n-alkanes (C-16 to C-30) with increasing concentrations along three pentads (Indiana University, Stable Isotope Laboratory). Values fitted well along a straight line with a linear regression R2 no slower than 0.999. Although pyrolysis may induce thermal cracking at high pyrolysis temperature (400ºC), significant changes in isotopic composition were not observed in light long chain molecules present in the standard solution nor the wood samples. Our results support the idea Py-CSIA can reveal major differences between compounds from different biogenic origin: polysaccharides, lignin-derived units and fatty acids. Despite that wood from different origins provide very similar Py-GC/MS pattern, Py-CSIA can make the difference giving additional valuable information.
DescriptionPóster presentado en el The 15th meeting of the Stable Isotope Mass Spectrometry Users Group 26th -28th June 2019 Organic Geochemistry Unit, School of Chemistry, University of Bristol
Appears in Collections:(IRNAS) Comunicaciones congresos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.