en
Scientific article
English

Unsubstituted and Hydroxy Substituted Fatty Acids in a Recent Lacustrine Sediment (Lake Léman, Geneva, Switzerland)

Published inInternational Journal of Environmental Analytical Chemistry, vol. 31, no. 2-4, p. 107-127
Publication date1987
Abstract

Unsubstituted as well as α-, β- and (ω-1)-hydroxy substituted fatty acids were analyzed in a 5 m long sediment core taken from Lake Léman (Switzerland). All these acids occur in three forms: unbound, bound and tightly bound and our results show that there is no conversion from one form to another. The fact that below a burial depth of 30 cm the abundance profiles show no decreasing trend indicates that the diagenetic reactions do not operate below that depth. On the basis of our results, compared with other published data, source correlations are postulated for each of the acid classes. The presence of unsubstituted monounsaturated acids in the C₂₀ to C₃₂ range probably indicates that long chain fatty acids cannot be considered only as indicators of inputs from higher plants. Finally, C₂₇, C₂₉ and C₃₁ (ω-1)-hydroxyacids with unusual structures have also been found in these sediments, as well as 2-methyl nonacosanoic acid; their origin has not yet been established.

Keywords
  • Sediments
  • Lacustrine
  • Fatty acids
  • Hydroxyacids
  • Biological markers
Citation (ISO format)
MENDOZA, Yery Antonio et al. Unsubstituted and Hydroxy Substituted Fatty Acids in a Recent Lacustrine Sediment (Lake Léman, Geneva, Switzerland). In: International Journal of Environmental Analytical Chemistry, 1987, vol. 31, n° 2-4, p. 107–127. doi: 10.1080/03067318708077136
Main files (1)
Article (Published version)
accessLevelRestricted
Identifiers
ISSN of the journal1029-0397
111views
0downloads

Technical informations

Creation07/29/2021 2:33:00 PM
First validation07/29/2021 2:33:00 PM
Update time03/16/2023 12:58:14 AM
Status update03/16/2023 12:58:13 AM
Last indexation01/17/2024 1:47:53 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack