Ultra trace determination of fluorinated aromatic carboxylic acids in aqueous reservoir fluids by solid phase extraction in combination with negative ion chemical ionisation mass spectrometry after derivatisation with pentafluorobenzyl bromide |
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| Authors: | C U Galdiga Tyge Greibrokk |
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| Institution: | (1) Institute for Energy Technology, P.O.Box 40, N-2007 Kjeller, Norway e-mail: claus@ife.no, NO;(2) University of Oslo, Department of Chemistry, P.O.Box 1033, N-0315 Oslo, Norway, NO |
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| Abstract: | A new GC/MS method for the ultra trace analysis of fluorinated aromatic carboxylic acids after solid phase extraction and
derivatisation with pentafluorobenzyl bromide is described. The pentafluorobenzyl esters formed were determined by negative
ion chemical ionisation GC/MS in aqueous reservoir samples in concentrations as low as 0.010 μg/L. Determination of selected
fluorinated aromatic carboxylic acids in aqueous reservoir samples, already injected as water tracers in North Sea reservoirs,
confirmed the applicability of the method.
Received: 5 September 1997 / Revised: 21 January 1998 / Accepted: 26 January 1998 |
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