Issue 11, 2014

Simultaneous determination of potassium, sodium, calcium, and magnesium in virgin olive oils by capillary electrophoresis with capacitively coupled contactless conductivity detection

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 Mg2+ 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.

Graphical abstract: Simultaneous determination of potassium, sodium, calcium, and magnesium in virgin olive oils by capillary electrophoresis with capacitively coupled contactless conductivity detection

Article information

Article type
Paper
Submitted
13 Лют 2014
Accepted
24 Бер 2014
First published
25 Бер 2014

Anal. Methods, 2014,6, 3629-3633

Author version available

Simultaneous determination of potassium, sodium, calcium, and magnesium in virgin olive oils by capillary electrophoresis with capacitively coupled contactless conductivity detection

M. A. T. Lemos, A. M. Pinheiro, R. J. Cassella and D. P. Jesus, Anal. Methods, 2014, 6, 3629 DOI: 10.1039/C4AY00363B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements