Mathematical method for the prediction of retention times of fatty acid methyl esters in temperature-programmed capillary gas chromatography.
J Agric Food Chem
; 50(15): 4156-63, 2002 Jul 17.
Article
em En
| MEDLINE
| ID: mdl-12105939
An accurate method for identification of fatty acids in complex mixtures analyzed by temperature-programmed capillary gas chromatography is described. The method is based on a mathematical approach using regression curves obtained by plotting the relative retention times of fatty acid methyl esters (FAMEs) analyzed in isothermal and gradient temperature conditions. The method was applied to a complex biological sample (human milk), and it was possible to identify 64 fatty acids, including branched-chain and other fatty acids for which reference standards were not readily available. The identities of the majority of the peaks were confirmed by mass spectrometry. The relative residuals and the relative differences between estimated and measured relative retention times of individual FAMEs varied from 0.03 to 3.15% and from 0.0 to 2.9%, respectively. The method is useful for identification of fatty acids in routine analysis.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Temperatura
/
Cromatografia Gasosa
/
Ácidos Graxos
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Limite:
Humans
Idioma:
En
Revista:
J Agric Food Chem
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Estados Unidos