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: | Text |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-10-155-2014 https://cp.copernicus.org/articles/10/155/2014/ |
id |
fttriple:oai:gotriple.eu:RmiZ1Gl1OL4Xk0zAeeJ1h |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:RmiZ1Gl1OL4Xk0zAeeJ1h 2023-05-15T13:38:29+02:00 An inter-laboratory investigation of the Arctic sea ice biomarker proxy IP25 in marine sediments: key outcomes and recommendations Belt, S. T. Brown, T. A. Ampel, L. Cabedo-Sanz, P. Fahl, K. Kocis, J. J. Massé, G. Navarro-Rodriguez, A. Ruan, J. Xu, Y. 2018-09-27 https://doi.org/10.5194/cp-10-155-2014 https://cp.copernicus.org/articles/10/155/2014/ en eng doi:10.5194/cp-10-155-2014 10670/1.e0jagz https://cp.copernicus.org/articles/10/155/2014/ undefined Geographica Helvetica - geography eISSN: 1814-9332 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2018 fttriple https://doi.org/10.5194/cp-10-155-2014 2023-01-22T17:52:53Z 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 ... Text Antarc* Antarctic Antarctic Peninsula Arctic Iceland Sea ice Southern Ocean Unknown Antarctic Antarctic Peninsula Arctic Southern Ocean The Antarctic Climate of the Past 10 1 155 166 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir Belt, S. T. Brown, T. A. Ampel, L. Cabedo-Sanz, P. Fahl, K. Kocis, J. J. Massé, G. 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 |
topic_facet |
geo envir |
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 |
Text |
author |
Belt, S. T. Brown, T. A. Ampel, L. Cabedo-Sanz, P. Fahl, K. Kocis, J. J. Massé, G. Navarro-Rodriguez, A. Ruan, J. Xu, Y. |
author_facet |
Belt, S. T. Brown, T. A. Ampel, L. Cabedo-Sanz, P. Fahl, K. Kocis, J. J. Massé, G. Navarro-Rodriguez, A. Ruan, J. Xu, Y. |
author_sort |
Belt, S. 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 |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-10-155-2014 https://cp.copernicus.org/articles/10/155/2014/ |
geographic |
Antarctic Antarctic Peninsula Arctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Arctic Southern Ocean The Antarctic |
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 |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-10-155-2014 10670/1.e0jagz https://cp.copernicus.org/articles/10/155/2014/ |
op_rights |
undefined |
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_ |
1766106705166336000 |