EIMS Fragmentation and detection of autoxidation products of 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene in Arctic sediments
12 months embargo applied <jats:sec><jats:title>Rationale</jats:title><jats:p>Some highly branched isoprenoid (HBI) alkenes are commonly used as proxies for palaeoceanographic reconstructions. However, there is a need to identify compounds that are sufficiently stable and abu...
Published in: | Rapid Communications in Mass Spectrometry |
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Online Access: | http://hdl.handle.net/10026.1/15595 https://doi.org/10.1002/rcm.8816 |
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ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.1/15595 2024-06-09T07:43:57+00:00 EIMS Fragmentation and detection of autoxidation products of 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene in Arctic sediments Rontani, J Smik, L Belt, ST 2020-04-21 e8816- Print application/pdf http://hdl.handle.net/10026.1/15595 https://doi.org/10.1002/rcm.8816 en eng Wiley England ISSN:0951-4198 ISSN:1097-0231 E-ISSN:1097-0231 0951-4198 1097-0231 ARTN e8816 http://hdl.handle.net/10026.1/15595 doi:10.1002/rcm.8816 2021-4-21 Not known 3401 Analytical Chemistry 34 Chemical Sciences journal-article Article 2020 ftunivplympearl https://doi.org/10.1002/rcm.8816 2024-05-14T23:46:24Z 12 months embargo applied <jats:sec><jats:title>Rationale</jats:title><jats:p>Some highly branched isoprenoid (HBI) alkenes are commonly used as proxies for palaeoceanographic reconstructions. However, there is a need to identify compounds that are sufficiently stable and abundant to be used as tracers of HBI oxidation in sediments. 2,6,10,14‐Tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5(<jats:italic>Z/E</jats:italic>)‐en‐4‐ols resulting from 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene appear to be useful for this purpose.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Comparison of electron ionization (EI) mass spectra and retention times with those of standards allowed formal identification of autoxidation products of 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene. EI‐MS fragmentations of TMS ethers of the main oxidation products (2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5(<jats:italic>Z/E</jats:italic>)‐en‐4‐ols) were deduced by gas chromatography/electron ionization mass spectrometry (GC/EI‐MS), low‐energy collision‐induced dissociation tandem mass spectrometry (CID‐MS/MS) and accurate mass measurements. These compounds were then quantified in Arctic sediment samples in MS/MS multiple reaction monitoring (MRM) mode using transitions based on the main fragmentation pathways elucidated.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>2,6,10,14‐Tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5(<jats:italic>Z/E</jats:italic>)‐en‐4‐ols were identified after autoxidation of the HBI alkene 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene. Low‐energy CID‐MS/MS analyses and accurate mass measurements allowed the EI‐MS fragmentation pathways of their trimethylsilyl (TMS) derivatives to be elucidated. Some specific fragment ions and chromatographic retention times were also useful for ... Article in Journal/Newspaper Arctic PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) Arctic Rapid Communications in Mass Spectrometry 34 15 |
institution |
Open Polar |
collection |
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) |
op_collection_id |
ftunivplympearl |
language |
English |
topic |
3401 Analytical Chemistry 34 Chemical Sciences |
spellingShingle |
3401 Analytical Chemistry 34 Chemical Sciences Rontani, J Smik, L Belt, ST EIMS Fragmentation and detection of autoxidation products of 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene in Arctic sediments |
topic_facet |
3401 Analytical Chemistry 34 Chemical Sciences |
description |
12 months embargo applied <jats:sec><jats:title>Rationale</jats:title><jats:p>Some highly branched isoprenoid (HBI) alkenes are commonly used as proxies for palaeoceanographic reconstructions. However, there is a need to identify compounds that are sufficiently stable and abundant to be used as tracers of HBI oxidation in sediments. 2,6,10,14‐Tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5(<jats:italic>Z/E</jats:italic>)‐en‐4‐ols resulting from 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene appear to be useful for this purpose.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Comparison of electron ionization (EI) mass spectra and retention times with those of standards allowed formal identification of autoxidation products of 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene. EI‐MS fragmentations of TMS ethers of the main oxidation products (2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5(<jats:italic>Z/E</jats:italic>)‐en‐4‐ols) were deduced by gas chromatography/electron ionization mass spectrometry (GC/EI‐MS), low‐energy collision‐induced dissociation tandem mass spectrometry (CID‐MS/MS) and accurate mass measurements. These compounds were then quantified in Arctic sediment samples in MS/MS multiple reaction monitoring (MRM) mode using transitions based on the main fragmentation pathways elucidated.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>2,6,10,14‐Tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5(<jats:italic>Z/E</jats:italic>)‐en‐4‐ols were identified after autoxidation of the HBI alkene 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene. Low‐energy CID‐MS/MS analyses and accurate mass measurements allowed the EI‐MS fragmentation pathways of their trimethylsilyl (TMS) derivatives to be elucidated. Some specific fragment ions and chromatographic retention times were also useful for ... |
format |
Article in Journal/Newspaper |
author |
Rontani, J Smik, L Belt, ST |
author_facet |
Rontani, J Smik, L Belt, ST |
author_sort |
Rontani, J |
title |
EIMS Fragmentation and detection of autoxidation products of 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene in Arctic sediments |
title_short |
EIMS Fragmentation and detection of autoxidation products of 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene in Arctic sediments |
title_full |
EIMS Fragmentation and detection of autoxidation products of 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene in Arctic sediments |
title_fullStr |
EIMS Fragmentation and detection of autoxidation products of 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene in Arctic sediments |
title_full_unstemmed |
EIMS Fragmentation and detection of autoxidation products of 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene in Arctic sediments |
title_sort |
eims fragmentation and detection of autoxidation products of 2,6,10,14‐tetramethyl‐7‐(3‐methylpent‐4‐enyl)‐pentadec‐5‐ene in arctic sediments |
publisher |
Wiley |
publishDate |
2020 |
url |
http://hdl.handle.net/10026.1/15595 https://doi.org/10.1002/rcm.8816 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
ISSN:0951-4198 ISSN:1097-0231 E-ISSN:1097-0231 0951-4198 1097-0231 ARTN e8816 http://hdl.handle.net/10026.1/15595 doi:10.1002/rcm.8816 |
op_rights |
2021-4-21 Not known |
op_doi |
https://doi.org/10.1002/rcm.8816 |
container_title |
Rapid Communications in Mass Spectrometry |
container_volume |
34 |
container_issue |
15 |
_version_ |
1801372775879802880 |