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|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|
|Editor:||Royal Society of Chemistry|
|Appears in Collections:||IQ - Artigos e Outros Documentos|
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