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Table 3 Retention times (Rt stds ) of C 8:0 -C 20:0 carboxylic acids obtained by SBSE-TD-GC-MS analyses of a standard mixture (50 μg/L)

From: 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)

Compounds Molecular formula Rt stds (min) Rt fluids (min)
octanoic acid C8H16O2 8.30 8.24†
nonanoic acid C9H18O2 9.47 9.43*
decanoic acid C10H20O2 10.61 10.52*
undecanoic acid C11H22O2 11.68 -
dodecanoic acid C12H24O2 12.67 12.58*
tridecanoic acid C13H26O2 13.59 -
tetradecanoic acid C14H28O2 14.44 14.41*
pentadecanoic acid C15H30O2 15.24 15.23†
hexadecanoic acid C16H32O2 16.02 16.12*
heptadecanoic acid C17H34O2 16.78 -
octadecanoic acid C18H36O2 17.65 17.61*
nonadecanoic acid C19H38O2 18.27 -
eicosanoic acid C20H40O2 - -
  1. Detection of the compounds was achieved using ions m/z 60 and 73. The NIST08 library was used for identification. Retention times (Rt fluids) obtained in hydrothermal fluids are given for direct comparison: * This study, † [13].