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Table 4 Retention times (Rt stds ) of C 9 -C 20 n-alkanes obtained by SBSE-TD-GC-MS analyses of a standard mixture (10 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)
nonane C9H20 4.75 4.76
decane C10H22 6.01 6.05
undecane C11H24 7.28 7.32
dodecane C12H26 8.49 8.52
tridecane C13H28 9.65 9.70
tetradecane C14H30 10.74 10.79
pentadecane C15H32 11.77 11.81
hexadecane C16H34 12.77 12.81
heptadecane C14H36 13.69 13.74
octadecane C18H38 14.57 14.62
nonadecane C19H40 15.41 15.47
eicosane C20H42 16.21 -
  1. Detection of the compounds was achieved using ions m/z 57 and 85. The NIST08 library was used for identification. Retention times (Rt fluids) obtained in hydrothermal fluids samples of this study are given for direct comparison.