An inter-laboratory investigation of the Arctic sea ice biomarker proxy IP25 in marine sediments: key outcomes and recommendations
We describe the results of an inter-laboratory investigation into the identification and quantification of the Arctic sea ice biomarker proxy IP25 in marine sediments. Seven laboratories took part in the study, which consisted of the analysis of IP25 in a series of sediment samples from different re...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
COPERNICUS GESELLSCHAFT MBH
2014
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/33767/ http://www.clim-past.net/10/155/2014/ https://hdl.handle.net/10013/epic.42909 |
id |
ftawi:oai:epic.awi.de:33767 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:33767 2024-09-15T17:45:20+00:00 An inter-laboratory investigation of the Arctic sea ice biomarker proxy IP25 in marine sediments: key outcomes and recommendations Belt, Simon T. Brown, Thomas A. Ampel, L. Cabedo-Sanz, P. Fahl, Kirsten Kocis, J.J. Massé, Guillaume Navarro-Rodriguez, A. Ruan, J. Xu, Y. 2014 https://epic.awi.de/id/eprint/33767/ http://www.clim-past.net/10/155/2014/ https://hdl.handle.net/10013/epic.42909 unknown COPERNICUS GESELLSCHAFT MBH Belt, S. T. , Brown, T. A. , Ampel, L. , Cabedo-Sanz, P. , Fahl, K. orcid:0000-0001-9317-4656 , Kocis, J. , Massé, G. , Navarro-Rodriguez, A. , Ruan, J. and Xu, Y. (2014) An inter-laboratory investigation of the Arctic sea ice biomarker proxy IP25 in marine sediments: key outcomes and recommendations , Climate of the Past, 10 (1), pp. 155-166 . doi:10.5194/cp-10-155-2014 <https://doi.org/10.5194/cp-10-155-2014> , hdl:10013/epic.42909 EPIC3Climate of the Past, COPERNICUS GESELLSCHAFT MBH, 10(1), pp. 155-166, ISSN: 1814-9324 Article isiRev 2014 ftawi https://doi.org/10.5194/cp-10-155-2014 2024-06-24T04:07:26Z We describe the results of an inter-laboratory investigation into the identification and quantification of the Arctic sea ice biomarker proxy IP25 in marine sediments. Seven laboratories took part in the study, which consisted of the analysis of IP25 in a series of sediment samples from different regions of the Arctic, sub-Arctic and Antarctic, additional sediment extracts and purified standards. The results obtained allowed 4 key outcomes to be determined. First, IP25 was identified by all laboratories in sediments from the Canadian Arctic with inter-laboratory variation in IP25 concentration being substantially larger than within individual laboratories. This greater variation between laboratories was attributed to the difficulty in accurately determining instrumental response factors for IP25, even though laboratories were supplied with appropriate standards. Second, the identification of IP25 by 3 laboratories in sediment from SW Iceland that was believed to represent a blank, was interpreted as representing a better limit of detection or quantification for such laboratories, contamination or mis-identification. These alternatives could not be distinguished conclusively with the data available, although it is noted that the precision of these data was significantly poorer compared with the other IP25 concentration measurements. Third, 3 laboratories reported the occurrence of IP25 in a sediment sample from the Antarctic Peninsula even though this biomarker is believed to be absent from the Southern Ocean. This anomaly is attributed to a combined chromatographic and mass spectrometric interference that results from the presence of a di-unsaturated highly branched isoprenoid (HBI) pseudo-homologue of IP25 that occurs in Antarctic sediments. Finally, data are presented that suggest that extraction of IP25 is consistent between Accelerated Solvent Extraction (ASE) and sonication methods and that IP25 concentrations based on 7-hexylnonadecane as an internal standard are comparable using these methods. Recoveries ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Arctic Iceland Sea ice Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Climate of the Past 10 1 155 166 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We describe the results of an inter-laboratory investigation into the identification and quantification of the Arctic sea ice biomarker proxy IP25 in marine sediments. Seven laboratories took part in the study, which consisted of the analysis of IP25 in a series of sediment samples from different regions of the Arctic, sub-Arctic and Antarctic, additional sediment extracts and purified standards. The results obtained allowed 4 key outcomes to be determined. First, IP25 was identified by all laboratories in sediments from the Canadian Arctic with inter-laboratory variation in IP25 concentration being substantially larger than within individual laboratories. This greater variation between laboratories was attributed to the difficulty in accurately determining instrumental response factors for IP25, even though laboratories were supplied with appropriate standards. Second, the identification of IP25 by 3 laboratories in sediment from SW Iceland that was believed to represent a blank, was interpreted as representing a better limit of detection or quantification for such laboratories, contamination or mis-identification. These alternatives could not be distinguished conclusively with the data available, although it is noted that the precision of these data was significantly poorer compared with the other IP25 concentration measurements. Third, 3 laboratories reported the occurrence of IP25 in a sediment sample from the Antarctic Peninsula even though this biomarker is believed to be absent from the Southern Ocean. This anomaly is attributed to a combined chromatographic and mass spectrometric interference that results from the presence of a di-unsaturated highly branched isoprenoid (HBI) pseudo-homologue of IP25 that occurs in Antarctic sediments. Finally, data are presented that suggest that extraction of IP25 is consistent between Accelerated Solvent Extraction (ASE) and sonication methods and that IP25 concentrations based on 7-hexylnonadecane as an internal standard are comparable using these methods. Recoveries ... |
format |
Article in Journal/Newspaper |
author |
Belt, Simon T. Brown, Thomas A. Ampel, L. Cabedo-Sanz, P. Fahl, Kirsten Kocis, J.J. Massé, Guillaume Navarro-Rodriguez, A. Ruan, J. Xu, Y. |
spellingShingle |
Belt, Simon T. Brown, Thomas A. Ampel, L. Cabedo-Sanz, P. Fahl, Kirsten Kocis, J.J. Massé, Guillaume Navarro-Rodriguez, A. Ruan, J. Xu, Y. An inter-laboratory investigation of the Arctic sea ice biomarker proxy IP25 in marine sediments: key outcomes and recommendations |
author_facet |
Belt, Simon T. Brown, Thomas A. Ampel, L. Cabedo-Sanz, P. Fahl, Kirsten Kocis, J.J. Massé, Guillaume Navarro-Rodriguez, A. Ruan, J. Xu, Y. |
author_sort |
Belt, Simon T. |
title |
An inter-laboratory investigation of the Arctic sea ice biomarker proxy IP25 in marine sediments: key outcomes and recommendations |
title_short |
An inter-laboratory investigation of the Arctic sea ice biomarker proxy IP25 in marine sediments: key outcomes and recommendations |
title_full |
An inter-laboratory investigation of the Arctic sea ice biomarker proxy IP25 in marine sediments: key outcomes and recommendations |
title_fullStr |
An inter-laboratory investigation of the Arctic sea ice biomarker proxy IP25 in marine sediments: key outcomes and recommendations |
title_full_unstemmed |
An inter-laboratory investigation of the Arctic sea ice biomarker proxy IP25 in marine sediments: key outcomes and recommendations |
title_sort |
inter-laboratory investigation of the arctic sea ice biomarker proxy ip25 in marine sediments: key outcomes and recommendations |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/33767/ http://www.clim-past.net/10/155/2014/ https://hdl.handle.net/10013/epic.42909 |
genre |
Antarc* Antarctic Antarctic Peninsula Arctic Iceland Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Arctic Iceland Sea ice Southern Ocean |
op_source |
EPIC3Climate of the Past, COPERNICUS GESELLSCHAFT MBH, 10(1), pp. 155-166, ISSN: 1814-9324 |
op_relation |
Belt, S. T. , Brown, T. A. , Ampel, L. , Cabedo-Sanz, P. , Fahl, K. orcid:0000-0001-9317-4656 , Kocis, J. , Massé, G. , Navarro-Rodriguez, A. , Ruan, J. and Xu, Y. (2014) An inter-laboratory investigation of the Arctic sea ice biomarker proxy IP25 in marine sediments: key outcomes and recommendations , Climate of the Past, 10 (1), pp. 155-166 . doi:10.5194/cp-10-155-2014 <https://doi.org/10.5194/cp-10-155-2014> , hdl:10013/epic.42909 |
op_doi |
https://doi.org/10.5194/cp-10-155-2014 |
container_title |
Climate of the Past |
container_volume |
10 |
container_issue |
1 |
container_start_page |
155 |
op_container_end_page |
166 |
_version_ |
1810493098115989504 |