Trace elements determination in edible seaweeds by an optimized and validated ICP-MS method |
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| Authors: | S. R denas de la Rocha, F.J. S nchez-Muniz, M. G mez-Juaristi,M.T. Larrea Marí n |
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| Affiliation: | aDepartamento de Química Analítica, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain;bDepartamento de Nutrición, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain;cCentro de Espectrometría Atómica. Universidad Complutense, 28040 Madrid, Spain;dCentro Nacional de Investigaciones Metalúrgicas (C.S.I.C). Avenida Gregorio del Amo, 8. 28040 Madrid, Spain |
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| Abstract: | An optimized and validated inductively coupled plasma mass spectrometry (ICP-MS) method was used to analyze trace elements in seaweeds. Different volumes and rates of HNO3 and H2O2, digestion times, and microwave power levels were tested to ascertain the best conditions for sample digestion. Analytical mass and instrumental parameters were selected to assure accurate and precise determination of As, Cd, Co, Cr, Mo, Ni, Pb, Sb, Se, and V by ICP-MS. The method was optimized and validated using biological Certified Reference Materials. In addition, some samples of seaweeds (Porphyra and Laminaria) from France, Spain, Korea, and Japan were analyzed using the optimized method. Porphyra presented higher concentrations of most elements, except for As, than Laminaria. Seaweeds from Korea and Japan tended to display the highest concentrations of Pb and Cd. In contrast, Spanish and French samples showed the highest levels of some micro-elements essential to human nutrition. |
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| Keywords: | Laminaria spp. Porphyra spp. Inductively coupled plasma mass spectrometry Seaweeds Method validation Microwave digestion Minerals Trace elements Food analysis Food composition |
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