Organic geochemistry of Walvis Bay diatomaceous ooze—III. Structural analysis of the monoenoic and polycyclic fatty acids

Fatty acids isolated from four sections of a core sampled in diatomaceous ooze off the shore of Walvis Bay (S.W. Africa) were re-analysed with the object of determining the position and geometry of double bonds in the monoenoic fatty acids. The complete fatty acid mixtures were derivatised in such a way that unsaturated acids could be analysed as trimethylsilyloxy methyl esters and the saturated acids as methyl esters.