(?) stands for compounds for which further investigation is needed to confirm their presence. Results were identical for the two samples in 2007 with respect to the compounds listed in this table, therefore it appears only one column for 2007. Cn is the carbonated chain length of the identified compounds. Additionally, ranges of Log(Ko/w) values at 25°C for pure water are given. These values are meant to give a rough estimate only. The reader should bear in mind that the partition between seawater or hydrothermal fluids and PDMS will somewhat differ from these values. Precise identification of isomers was not possible without the use of synthetic standards so that ranges of values have been determined based on log(Ko/w) values for compounds with the same raw formula. Values were obtained from the SciFinder® data base.