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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

Texto completo
Autor(es):
Lemos, M. A. T. [1] ; Pinheiro, A. M. [2] ; Cassella, R. J. [1] ; Jesus, D. P. [2]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Fed Fluminense, Inst Chem, Niteroi, RJ - Brazil
[2] Univ Estadual Campinas, UNICAMP, Inst Chem, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: ANALYTICAL METHODS; v. 6, n. 11, p. 3629-3633, JUN 7 2014.
Citações Web of Science: 9
Resumo

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-(CD)-D-4). The metal ions were separated in less than 3 min with good peak resolutions. The CE-(CD)-D-4 method exhibited good linearity, with coefficients of determination (R-2) 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-(CD)-D-4 method was successfully applied for determination of the target analytes in five commercial samples of VOO. (AU)

Processo FAPESP: 13/22485-6 - Desenvolvimento e aplicação de eletroextração em membrana em métodos eletroforéticos de análises
Beneficiário:Dosil Pereira de Jesus
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 08/57805-2 - Instituto de Bioanalítica
Beneficiário:Lauro Tatsuo Kubota
Linha de fomento: Auxílio à Pesquisa - Temático