Metabolic profiling approach to determine phenolic compounds of virgin olive oil by direct injection and liquid chromatography coupled to mass spectrometry.

Abstract:

:A LC-MS method involving direct injection of extra-virgin olive oil (EVOO) - after a simple dilution - for determining its phenolic compounds has been developed. Optimization of the most appropriate solvent for sample dilution, selection of the optimum oil/solvent ratio, and establishment of column cleaning strategy and maximum number of injections were some of the most relevant steps. Then, the analytical parameters of the method were evaluated, establishing LOD (from 3.3 to 31.6µg/L) and LOQ, precision (RSD values for inter-day repeatability were found between 3.49 and 6.12%), and trueness (within the range 89.9-102.3% for 1.0mg/L) and checking possible matrix effect (which was no significant). Three kinds of calibration were used: external standard, standard addition and calibration in a phenols-free matrix, which was subsequently applied to quantify the phenolic compounds in 16 EVOOs (from 6 cultivars). A total of 21 compounds were determined without the need of using any extraction protocol.

journal_name

Food Chem

journal_title

Food chemistry

authors

Olmo-García L,Bajoub A,Monasterio RP,Fernández-Gutiérrez A,Carrasco-Pancorbo A

doi

10.1016/j.foodchem.2017.03.139

subject

Has Abstract

pub_date

2017-09-15 00:00:00

pages

374-385

eissn

0308-8146

issn

1873-7072

pii

S0308-8146(17)30534-4

journal_volume

231

pub_type

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