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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A simple analytical method for determining inorganic anions and formate in virgin olive oils by capillary electrophoresis with capacitively coupled contactless conductivity detection

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Travassos Lemos, Maria Augusta [1] ; Cassella, Ricardo Jorgensen [1] ; de Jesus, Dosil Pereira [2]
Total Authors: 3
[1] Univ Fed Fluminense, Inst Quim, Niteroi, RJ - Brazil
[2] Univ Estadual Campinas, Inst Chem, UNICAMP, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: FOOD CONTROL; v. 57, p. 327-332, NOV 2015.
Web of Science Citations: 5

This paper describes a novel and simple method for determining chloride, nitrate, sulfate, fluoride, and formate in virgin olive oil (VOO) by capillary electrophoresis with capacitively coupled contactless conductivity detection. The anions were extracted from VOO by a simple ultrasound-assisted aqueous liquid-liquid extraction procedure. The anions were separated in less than 3 min with good peak resolutions using a background electrolyte composed of 15 mmol L-1 histidine solution at pH 4.0, adjusted with lactic acid, and 0.6 mmol L-1 cetyltrimethylammonium hydroxide as electrosmotic flow (EOF) modifier. Tartrate was used as internal standard (I.S.). The proposed method showed good linearity and had coefficients of determination (R-2) ranging from 0.9984 to 0.9999. The limits of quantification (LOQ) were between 0.01 and 0.7 mg kg(-1). Recovery tests were used to evaluate the efficiency of the extraction procedure; the recovery percentages ranged from 70.2 to 118%, with a relative standard deviation (RSD) varying from 0.7 to 19.4%. The proposed method was applied to the determination of the anions in five different commercial samples of VOO. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 13/22485-6 - Development and application of electromembrane extraction in capillary electrophoresis methods
Grantee:Dosil Pereira de Jesus
Support type: Regular Research Grants