期刊论文详细信息
Geochemical Transactions
Characterisation of dissolved organic compounds in hydrothermal fluids by stir bar sorptive extraction - gas chomatography - mass spectrometry. Case study: the Rainbow field (36°N, Mid-Atlantic Ridge)
Research Article
Nils G Holm1  Jean-Luc Charlou2  Jean-Pierre Donval2  Cecile Konn3 
[1] Department of Geological Sciences, Geochemistry section, Stockholm University, 10691, Stockholm, Sweden;Laboratoire Géochimie Métallogénie, UR Géosciences Marines, Ifremer, Ctr Brest, B.P.70, 29280, Plouzané, France;Laboratoire Géochimie Métallogénie, UR Géosciences Marines, Ifremer, Ctr Brest, B.P.70, 29280, Plouzané, France;Department of Geological Sciences, Geochemistry section, Stockholm University, 10691, Stockholm, Sweden;
关键词: Sample preparation;    Extraction;    Organic compounds;    Hydrothermal fluids;    Ultramafic rocks;   
DOI  :  10.1186/1467-4866-13-8
 received in 2011-10-27, accepted in 2012-08-02,  发布年份 2012
来源: Springer
PDF
【 摘 要 】

The analysis of the dissolved organic fraction of hydrothermal fluids has been considered a real challenge due to sampling difficulties, complexity of the matrix, numerous interferences and the assumed ppb concentration levels. The present study shows, in a qualitative approach, that Stir Bar Sorptive Extraction (SBSE) followed by Thermal Desorption – Gas Chromatography – Mass Spectrometry (TD-GC-MS) is suitable for extraction of small sample volumes and detection of a wide range of volatile and semivolatile organic compounds dissolved in hydrothermal fluids. In a case study, the technique was successfully applied to fluids from the Rainbow ultramafic-hosted hydrothermal field located at 36°14’N on the Mid-Atlantic Ridge (MAR). We show that n-alkanes, mono- and poly- aromatic hydrocarbons as well as fatty acids can be easily identified and their retention times determined. Our results demonstrate the excellent repeatability of the method as well as the possibility of storing stir bars for at least three years without significant changes in the composition of the recovered organic matter. A preliminary comparative investigation of the organic composition of the Rainbow fluids showed the great potential of the method to be used for assessing intrafield variations and carrying out time series studies. All together our results demonstrate that SBSE-TD-GC-MS analyses of hydrothermal fluids will make important contributions to the understanding of geochemical processes, geomicrobiological interactions and formation of mineral deposits.

【 授权许可】

CC BY   
© Konn et al.; licensee BioMed Central Ltd. 2012. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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