Easy mass spectrometry for metabolomics and quality control of vegetable and animal fats

Easy ambient sonic spray ionization (EASI), a novel desorption/ionization technique for ambient mass spectrometry analysis, is shown to permit the characterization of different types of vegetable and animal fats. The taxonomic markers of the oils, mainly fatty acids and phenols, are extracted with m...

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Bibliographic Details
Published in:European journal of lipid science and technology 2010-04, Vol.112 (4), p.434-438
Main Authors: Riccio, Maria Francesca, Saraiva, Sérgio A, Marques, Lygia Azevedo, Alberici, Rosana, Haddad, Renato, Moller, Jens C, Eberlin, Marcos N, Catharino, Rodrigo Ramos
Format: Article
Language:English
Subjects:
Ambient mass spectrometry
Biological and medical sciences
EASI-MS fingerprinting
Fat industries
Fatty acid
Food industries
Fundamental and applied biological sciences. Psychology
General aspects
Methods of analysis, processing and quality control, regulation, standards
Vegetable oil
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Summary:Easy ambient sonic spray ionization (EASI), a novel desorption/ionization technique for ambient mass spectrometry analysis, is shown to permit the characterization of different types of vegetable and animal fats. The taxonomic markers of the oils, mainly fatty acids and phenols, are extracted with methanol/water (1:1) solution and made alkaline with NH₄OH, then placed and dried on the surface of a glass tip and directly analyzed by EASI-MS in the negative-ion mode. EASI provides a supersonic cloud of charged droplets that causes efficient desorption and ionization of the oil markers directly from the surface of the glass tip. As proof-of-principle cases, EASI(-)-MS was applied to genuine samples of olive oil, hazelnut oil, soybean oil, grape seed oil, canola oil, butter, and lard. Characteristic metabolomics EASI(-)-MS profiles of fatty acids and eventually phenols were obtained.
ISSN:1438-7697
1438-9312
DOI:10.1002/ejlt.200900090