ORGANIC GEOCHEMISTRY OF WALVIS BAY DIATOMACEOUS OOZE .3. STRUCTURAL-ANALYSIS OF MONOENOIC AND POLYCYCLIC FATTY-ACIDS

被引：59

作者：

BOON, JJ

DELEEUW, JW

BURLINGAME, AL

机构：

[1] DELFT UNIV TECHNOL,DEPT CHEM & CHEM ENGN,ORGAN GEOCHEM UNIT,DELFT,NETHERLANDS

[2] UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720

来源：

GEOCHIMICA ET COSMOCHIMICA ACTA | 1978年 / 42卷 / 06期

关键词：

D O I：

10.1016/0016-7037(78)90008-X

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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. These mixtures were analysed by capillary gas chromatography-mass spectrometry connected to a computerized data acquisition system. Assignment of the double bond position is based on mass spectral data, while relative retention time is used for the determination of the cis-trans geometry. Monoenoic fatty acids in the sediment, range in chain length from C12 to C26. Double bonds in even and odd straight chain and branched chain (iso and anteiso) monoenoic fatty acids with a chain length shorter than C20 are found to be located at the Δ7, Δ9 and Δ11 positions. These acids are considered to be of algal and microbial origin. Some straight chain acids have double bonds at the °6 position. Monoenoic acids with a chain length longer than C20 have double bonds at the even straight chain Δ13 and Δ15 positions and are thought to be derived from yeast. The polycyclic fatty acids in the sediment consist of steroid and triterpenoid acids. The 5α(H) cholanic acid was identified in several core sections. The triterpenoid acids belong to the hopane family. The 17β(H),21β(Hrbishomo-hopanic acid is present as the major triterpenoid acid in a mixture which consists of various homologues with 17β(H),21β(H)-, but also l7α(H),21β(H)- and 17β(H),21α(H)stereochemistry. © 1978.

引用

页码：631 / 644

页数：14

共 64 条

[1]

Ackman, Tocher, McLachlanMclachlan, Marine phytoplankter fatty acids, Journal of the Fisheries Research Board of Canada, 25, pp. 1603-1620, (1968)

[2]

Apon, Nicolaides, The determination of position isomers of the methyl branched fatty acid methyl esters by capillary GC/MS, J. Chromatogr. Science, 13, pp. 467-473, (1975)

[3]

Boon, de Leeuw, Schenck, Organic geochemistry of Walvis Bay diatomaceous ooze-I. Occurrence and significance of the fatty acids, Geochim. Cosmochim. Acta, 39, pp. 1559-1565, (1975)

[4]

Boon, Rijpstra, de Leeuw, Schenck, Phytenic acid in sediments, Nature, 258, pp. 414-416, (1975)

[5]

Boon, de Leeuw, van der Hoek, Vosjan, Significance and taxonomic value of iso and anteiso monoenoic fatty acids and branched β-hydroxy acids in Desulfovibrio desulfuricans, J. Bacteriol, 129, pp. 1183-1191, (1977)

[6]

Boon, de Lange, Schuyl, de Leeuw, Schenck, Organic geochemistry of Walvis Bay diatomaceous ooze-1I. Occurrence and significance of the hydroxy fatty acids, Advances in Organic Geochemistry, pp. 255-272, (1977)

[7]

Boon, Liefkens, Rijstra, Baas, de Leeuw, Fatty acids of Desufovibrio desulfuricans as marker molecules in sedimentary environments, Biogeochemistry of Defined Microenvironments in Aquatic and Terrestrial Systems, (1978)

[8]

Boon, van der Meer, Schuyl, de Leeuw, Schenck, Organic geochemical analyses of core samples from site 362, Walvis Ridge, DSDP leg 40, Initial Reports of the Deep Sea Drilling Project, 40 Vpl., (1978)

[9]

Brennan, Griffin, Losel, Tyrell, The lipids of fungi, Progress in the Chemistry of Fats and Other lipids, 14, pp. 51-89, (1974)

[10]

Brooks, Eglinton, Gaskell, McHugh, Maxwell, Philp, Lipids of recent sediments-1. Straight chain hydrocarbons and carboxylic acids of some temperate lacustrine and sub-tropical lagoonal/tidal flat sediments, Chem. Geol, 18, pp. 21-38, (1976)

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