Simultaneous extraction and chromatographic separation of n-alkanes and alkenones from glycerol dialkyl glycerol tetraethers via selective Accelerated Solvent Extraction: Note
Simultaneous extraction and chromatographic separation of n-alkanes and alkenones from glycerol dialkyl glycerol tetraethers via selective Accelerated Solvent Extraction: Note
A method is described for simultaneous extraction and chromatographic separation of saturated hydrocarbons (n-alkanes) and unsaturated long-chain ketones (alkenones) from glycerol dialkyl glycerol tetraethers (GDGTs) using selective accelerated solvent extraction (ASE). We show that the method can be used to successfully separate n-alkanes and alkenones from GDGTs in marine sediment samples and n-alkanes from GDGTs in lake sediments and soil samples. A comparison of our method with analysis of samples purified using classical silica column chromatography demonstrates that the new method does not affect the alkenone unsaturation index (UK37), the TetraEther indeX (TEX86), the Methane Index (MI), the Ring Index (RI), the branched-GDGT-based paleotemperature and soil pH indices, the Branched and Isoprenoid Tetraether (BIT) index, the n-alkane average chain length (ACL) or the carbon preference index (CPI). The new procedure results in higher sample recoveries for n-alkanes and more precise UK37 estimates at low concentrations, and contributes to reduced analyst laboratory time.
Auderset, Alexandra
a6054a25-7c59-49fe-a2cd-62c1d3f3c8b3
Schmitt, Mareike
d3eb55f0-b345-45a8-a767-7e166b4650e5
Martínez-García, Alfredo
3635c688-2f20-4c86-8c1c-927d08f338f1
1 May 2020
Auderset, Alexandra
a6054a25-7c59-49fe-a2cd-62c1d3f3c8b3
Schmitt, Mareike
d3eb55f0-b345-45a8-a767-7e166b4650e5
Martínez-García, Alfredo
3635c688-2f20-4c86-8c1c-927d08f338f1
Auderset, Alexandra, Schmitt, Mareike and Martínez-García, Alfredo
(2020)
Simultaneous extraction and chromatographic separation of n-alkanes and alkenones from glycerol dialkyl glycerol tetraethers via selective Accelerated Solvent Extraction: Note.
Organic Geochemistry, 143 (5), [103979].
(doi:10.1016/j.orggeochem.2020.103979).
Abstract
A method is described for simultaneous extraction and chromatographic separation of saturated hydrocarbons (n-alkanes) and unsaturated long-chain ketones (alkenones) from glycerol dialkyl glycerol tetraethers (GDGTs) using selective accelerated solvent extraction (ASE). We show that the method can be used to successfully separate n-alkanes and alkenones from GDGTs in marine sediment samples and n-alkanes from GDGTs in lake sediments and soil samples. A comparison of our method with analysis of samples purified using classical silica column chromatography demonstrates that the new method does not affect the alkenone unsaturation index (UK37), the TetraEther indeX (TEX86), the Methane Index (MI), the Ring Index (RI), the branched-GDGT-based paleotemperature and soil pH indices, the Branched and Isoprenoid Tetraether (BIT) index, the n-alkane average chain length (ACL) or the carbon preference index (CPI). The new procedure results in higher sample recoveries for n-alkanes and more precise UK37 estimates at low concentrations, and contributes to reduced analyst laboratory time.
This record has no associated files available for download.
More information
Accepted/In Press date: 27 January 2020
Published date: 1 May 2020
Identifiers
Local EPrints ID: 473710
URI: http://eprints.soton.ac.uk/id/eprint/473710
ISSN: 0146-6380
PURE UUID: df2d16af-ce14-4e34-80e0-adc911cd49a5
Catalogue record
Date deposited: 27 Jan 2023 18:09
Last modified: 17 Mar 2024 04:18
Export record
Altmetrics
Contributors
Author:
Alexandra Auderset
Author:
Mareike Schmitt
Author:
Alfredo Martínez-García
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics