Fast quantitative analysis of n-alkanes, PAHs and alkenones in sediments
Raja, Maria (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Villanueva, J. (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Moreu-Romero, C. (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Giaime, Matthieu (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Rosell Melé, Antoni (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)

Date:	2022
Abstract:	The study of different organic biomarker classes is essential to elucidate global Earth dynamics since different biogeochemical processes play a role in regulating environmental and climatic conditions. However, multiproxy analysis generally consists of labor-intensive and time-consuming methodologies, which hamper the study of a large number of samples. Here, we develop and validate a fast analytical method to quantify different classes of organic biomarkers (PAHs, n-alkanes and alkenones) in sediments. This new method sequentally extracts and fractionates the target compounds using a pressure liquid extraction (PLE) system, which allows us to selectively obtain the analytes by reducing the time of analysis, sample handling and solvent usage. We show that our method provides reproducible results and high recoveries (>70%), and can be applied to a wide range of sedimentary environments, such as oceanic basins, continental slope and shelf, and lakes. Moreover, the method provides reproducible estimates of paleoclimatic indices, such as the carbon preference index (CPI), the average chain length (ACL) and the U37K'-derived sea-surface temperature (SST). Therefore, this new method enables fast quantitative multiproxy analysis of oceanic, coastal and lake sediments.
Grants:	European Commission 834934 Ministerio de Economía y Competitividad MDM-2015-0552 European Commission 891230
Note:	Altres ajuts: acords transformatius de la UAB
Note:	Unidad de excelencia María de Maeztu CEX2019-000940-M
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Alkanes ; Alkenones ; Biomarkers ; GC-MS ; PAH ; Paleoclimate ; Selective Pressurized Liquid Extraction
Published in:	Organic Geochemistry, Vol. 171 (September 2022) , art. 104471, ISSN 0146-6380

DOI: 10.1016/j.orggeochem.2022.104471

9 p, 3.7 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Institut de Ciència i Tecnologia Ambientals (ICTA)
Articles > Research articles
Articles > Published articles