NDLI: A reproducible method for the extraction, identification and quantification of the Arctic sea ice proxy IP<sub>25</sub> from marine sediments

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Analytical Methods Vol - 4 Issue - 2

Analytical Methods Vol -3

Analytical Methods Vol -2

Analytical Methods Vol -1

A reproducible method for the extraction, identification and quantification of the Arctic sea ice proxy IP₂₅ from marine sediments

Content Provider	Royal Society of Chemistry (RSC)
Author	Tonkin, Andrew Rodriguez, Alba Navarro Ingle, Rebecca Brown, Thomas A. Sanz, Patricia Cabedo Belt, Simon T.
Copyright Year	2012
Abstract	IP25 is a highly branched isoprenoid lipid biomarker that is produced by some Arctic sea ice diatoms in the spring. The presence of IP25 in marine sediments has previously been used as a proxy measure of past spring sea ice occurrence in the Arctic. Here, a reliable analytical procedure for the reproducible extraction, identification and quantification of IP25 from marine sediments is presented for the first time. This protocol represents a Standard Operating Procedure (SOP) that should be straightforward to adopt by other researchers in the future. This paper also explains the significance of individual components and steps, including the internal standards used for quantification of IP25, the purification of sediment extracts to simplify the subsequent analysis and some key analytical considerations, especially when mass spectrometric methods are used for detection and quantification. The application of the SOP is illustrated with the analysis of IP25 in sediment material obtained from two nearby locations in the western region of the Canadian Arctic Archipelago (CAA). In the first case (Franklin Bay), sediment material was homogenised and aliquots used to demonstrate the reproducibility of the SOP and to provide a suitable reference material when studying other cores. In the second case (central Amundsen Gulf), IP25 concentrations were shown to be quite variable, consistent with observations reported previously for sediment cores from other regions of the CAA. Further experimental considerations are presented that permit the conversion of sedimentary IP25 concentrations into temporal fluxes that are probably more useful for palaeo sea ice studies.
Starting Page	705
Ending Page	713
Page Count	9
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	4
Issue Number	3
Journal	Analytical Methods
DOI	10.1039/c2ay05728j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Terpenoid CAA Biomarker Sediment Standard operating procedure Amundsen Gulf Lipid Canadian Arctic Archipelago Franklin Bay Arctic Ocean Roald Amundsen Arctic Arctic sea Sea ice
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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