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Type: Artigo de periódico
Title: Simultaneous Determination Of Potassium, Sodium, Calcium, And Magnesium In Virgin Olive Oils By Capillary Electrophoresis With Capacitively Coupled Contactless Conductivity Detection
Author: Lemos M.A.T.
Pinheiro A.M.
Cassella R.J.
Jesus D.P.
Abstract: Analysis of trace elements in virgin olive oil (VOO) is important for nutritional information, geographical characterization, and adulteration detection. In this study, Na+, K+, Ca2+, and Mg2+ in VOO were extracted to an aqueous solution with the aid of ultrasound energy, which was analyzed by capillary electrophoresis with capacitively coupled contactless conductivity detection (CE-C4D). The metal ions were separated in less than 3 min with good peak resolutions. The CE-C4D method exhibited good linearity, with coefficients of determination (R2) ranging from 0.9978 to 0.9995. The limits of quantification for Na+, K+, Ca2+, and Mg 2+ were 0.029, 0.029, 0.033, and 0.044 mg kg-1, respectively. The results of the recovery tests at three concentration levels ranged from 80.5% to 119.6% with a relative standard deviation of 0.6 to 18.1%. The proposed CE-C4D method was successfully applied for determination of the target analytes in five commercial samples of VOO. © the Partner Organisations 2014.
Editor: Royal Society of Chemistry
Rights: aberto
Identifier DOI: 10.1039/c4ay00363b
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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