Arsenolipids in oil from blue whiting Micromesistius poutassou – evidence for arsenic-containing esters

Arsenic-containing lipids in the oil from the blue whiting fish ( Micromesistius poutassou ) were separated into three broad polarity groups and investigated by HPLC and mass spectrometry. A total of 11 arsenolipids including 4 new compounds were identified. The polar lipid fraction constituting 24%...

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Bibliographic Details
Published in:Scientific reports 2014-12, Vol.4 (1), p.7492-7492, Article 7492
Main Authors: Taleshi, Mojtaba S., Raber, Georg, Edmonds, John S., Jensen, Kenneth B., Francesconi, Kevin A.
Format: Article
Language:English
Subjects:
140/58
631/92/287/1183
639/638/11/296
Animals
Arsenic
Arsenic - analysis
Arsenic - chemistry
Arsenic - isolation & purification
Arsenicals
Carboxylic acids
Chromatography, High Pressure Liquid
Esters
Esters - chemistry
Fatty acids
Fish oils
Fish Oils - chemistry
Fishes
High-performance liquid chromatography
Humanities and Social Sciences
Hydrocarbons
Hydrocarbons - analysis
Hydrocarbons - chemistry
Hydrocarbons - isolation & purification
Lipids
Lipids - analysis
Lipids - chemistry
Lipids - isolation & purification
Liquid chromatography
Mass spectrometry
Mass spectroscopy
multidisciplinary
Polarity
Science
Spectrometry, Mass, Electrospray Ionization
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Summary:Arsenic-containing lipids in the oil from the blue whiting fish ( Micromesistius poutassou ) were separated into three broad polarity groups and investigated by HPLC and mass spectrometry. A total of 11 arsenolipids including 4 new compounds were identified. The polar lipid fraction constituting 24% of the total arsenolipid content (which totalled 2.16 μg As/g) contained four known dimethylarsinoyl fatty acids and three known dimethylarsinoyl hydrocarbons. The less polar fraction (ca 30% of the total arsenolipids) contained four new dimethylarsinoyl hydrocarbons with chain lengths 22–30 carbons, in addition to more complex arsenicals that hydrolysed to known dimethylarsinoyl fatty acids suggesting they were conjugated carboxylic acids, presumably esters. The rest of the lipid-soluble arsenic (ca 45% of the total) remained in the non-polar fraction together with the bulk of the fish oil lipids, a complex mixture of compounds that precluded identification of the small amounts of arsenolipids.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep07492