A new method for the determination of primary and secondary terrestrial and marine biomarkers in ice cores using liquid chromatography high-resolution mass spectrometry
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 4525659
Author(s) King, Amy C. F.; Giorio, Chiara; Wolff, Eric; Thomas, Elizabeth; Karroca, Ornela; Roverso, Marco; Schwikowski, Margit; Tapparo, Andrea; Gambaro, Andrea; Kalberer, Markus
Author(s) at UniBasel Kalberer, Markus
Year 2019
Title A new method for the determination of primary and secondary terrestrial and marine biomarkers in ice cores using liquid chromatography high-resolution mass spectrometry
Journal TALANTA
Volume 194
Pages / Article-Number 233-242
Keywords Ice core; Organic aerosol; Biomarker; Mass spectrometry; Rotary evaporation; Paleoclimate
Mesh terms Science & TechnologyPhysical SciencesChemistry, AnalyticalChemistry
Abstract The majority of atmospheric compounds measured in ice cores are inorganic, while analysis of their organic counterparts is a less well developed field. In recent years, understanding of formation, transport pathways and preservation of these compounds in ice and snow has improved, showing great potential for their use as biomarkers in ice cores. This study presents an optimised analytical technique for quantification of terrestrial and marine biosphere emissions of secondary organic aerosol (SOA) components and fatty acids in ice using HPLC-MS analysis. Concentrations of organic compounds in snow and ice are extremely low (typically ppb or ppt levels) and thus pre-concentration is required prior to analysis. Stir bar sorptive extraction (SBSE) showed potential for fatty acid compounds, but failed to recover SOA compounds. Solid phase extraction (SPE) recovered compounds across both organic groups but methods improving some recoveries came at the expense of others, and background contamination of fatty acids was high. Rotary evaporation was by far the best performing method across both SOA and fatty acid compounds, with average recoveries of 80%. The optimised pre-concentration - HPLC-MS method achieved repeatability of 9% averaged for all compounds. In environmental samples, both concentrations and seasonal trends were observed to be reproducible when analysed in two different laboratories using the same method.
Publisher ELSEVIER SCIENCE BV
ISSN/ISBN 0039-9140
edoc-URL https://edoc.unibas.ch/74517/
Full Text on edoc No
Digital Object Identifier DOI 10.1016/j.talanta.2018.10.042
ISI-Number 000456899700031
Document type (ISI) Article
 
   

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