Research article summary (published 5 Mar 2008):

Liquid-liquid extraction for the enrichment of edible oils with phenols from olive leaf extracts.

Full Abstract

A liquid-liquid extraction method to enrich edible oils--olive, sunflower, and soy oils--with phenols from olive leaf extracts is proposed. After microwave assistance to remove the phenols from three varieties of olive leaves, concentrations in the extracts between 12921 and 5173 mg/L of oleuropein, between 488 and 192 mg/L of apigenin-7-glucoside, between 444 and 219 mg/L of luteolin-7-glucoside, and between 501 and 213 mg/L of verbascoside were obtained, which clearly depended on the target variety. After optimization of the liquid-liquid extraction step, the concentrations in oils were 442, 162, and 164 mg/L of oleuropein, respectively, which were also enriched in apigenin-7-glucoside (between 8 and 15 mg/L, depending of the oil), lutelin-7-glucoside (between 11 and 12 mg/L), and verbascoside (between 11 and 13 mg/L). The oil-extract distribution factor of these compounds was also calculated for all olive leaf varieties and edible oils using different extracts concentrations and also different oil-extract volume ratios. Thus, a door is open to enrichment of any oil with olive phenols at preset concentrations using extracts preconcentrated as required and taking into account the distribution factor of the target compounds between the oil and the extracts.

Author information

Author/s: Japón-Luján, R (R); Luque de Castro, M D (MD);

Affiliation: Department of Analytical Chemistry, University of Córdoba, Campus of Rabanales, Córdoba, Spain.

Journal and publication information

Publication Type: Journal Article

Journal: Journal of agricultural and food chemistry (J Agric Food Chem), published in United States. (Language: eng)

Reference: 2008-Apr; vol 56 (issue 7) : pp 2505-11

Dates: Created 2008/04/02; Completed 2008/07/10;

PMID: 18324773, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Dietary Fats, Unsaturated - analysis Food Handling - methods Food, Fortified - analysis Olea - chemistry Phenols - analysis; isolation & purification

Phenols - analysis; isolation & purification Plant Extracts - chemistry Plant Leaves - chemistry Plant Oils - chemistry Soybean Oil - chemistry

Associated Chemicals: Dietary Fats, Unsaturated (0) ; Phenols (0) ; Plant Extracts (0) ; Plant Oils (0) ; sunflower seed oil (8001-21-6) ; Soybean Oil (8001-22-7)

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