Extraction of biomarkers from sediments with supercritical carbon dioxide: A comparative study with solvent extraction and thermodesorption methods

Hopfgartner, Gerard; Veuthey, Jean-Luc; Gulacar, Fazil; Buchs, Armand

doi:10.1016/0146-6380(90)90166-W

Scientific article

English

Extraction of biomarkers from sediments with supercritical carbon dioxide: A comparative study with solvent extraction and thermodesorption methods

Contributors

Hopfgartner, Gerard

; Veuthey, Jean-Luc; Gulacar, Fazil; Buchs, Armand

Published in

Organic geochemistry, vol. 15, no. 4, p. 397-402

Publication date

1990

Abstract

Supercritical fluid extraction of rocks with CO2 (SFE-CO2) can advantageously replace the organic solvent extraction technique (SE) which is generally used for the analysis of the biomarkers. The powdered rock is extracted by carbon dioxide supercritical fluid at 55°C and a pressure of 31 MPa. After decompression in a capillary restrictor, the CO2 is volatilized and the extracted compounds are trapped in hexane. An aliquot can then be directly injected into a dual GC-FID-FPD or GC-MS system. The total extraction procedure takes only 45 min and the results obtained for hopanes and steranes are in very good agreement with those of liquid solvent extraction, which requires several hours. A comparison with thermodesorption is also presented.

Keywords

Supercritical fluid extraction
Thermodesorption
Sediments
Hydrocarbons
Biological markers

UNIGE affiliation entities

Faculté des sciences / Section de chimie et biochimie / Département de chimie physique

UNIGE research groups

Groupe Gülaçar

Citation (ISO format)

HOPFGARTNER, Gerard et al. Extraction of biomarkers from sediments with supercritical carbon dioxide: A comparative study with solvent extraction and thermodesorption methods. In: Organic geochemistry, 1990, vol. 15, n° 4, p. 397–402. doi: 10.1016/0146-6380(90)90166-W

Identifiers

PID : unige:3056
DOI : 10.1016/0146-6380(90)90166-W

Journal ISSN

0146-6380

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14/03/2023 15:13:21

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29/10/2024 12:08:31

Extraction of biomarkers from sediments with supercritical carbon dioxide: A comparative study with solvent extraction and thermodesorption methods

Contributors

Published in

Publication date

Abstract

Keywords

UNIGE affiliation entities

UNIGE research groups

Citation (ISO format)

Identifiers

Journal ISSN

Technical informations

Creation

First validation

Update

Status update

Last indexation