Accuracy of a method based on atomic absorption spectrometry to determine inorganic arsenic in food: Outcome of the collaborative trial IMEP-41

A collaborative trial was conducted to determine the performance characteristics of an analytical method for the quantification of inorganic arsenic (iAs) in food. The method is based on (i) solubilisation of the protein matrix with concentrated hydrochloric acid to denature proteins and allow the r...

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Detalles Bibliográficos
Autores: Fiamegkos, I., Cordeiro, F., Robouch, P., Vélez, Dinoraz, Devesa, Vicenta, Raber, G., Sloth, J.J., Rasmussen, R.R., Llorente-Mirandes, T., López-Sánchez, J.F., Rubio, R., Cubadda, F., D'Amato, Marilena, Feldmann, Joerg, Raab, A., Emteborg, H., de la Calle, M.B.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/189247
Acceso en línea:http://hdl.handle.net/10261/189247
Access Level:acceso abierto
Palabra clave:Inorganic arsenic
Collaborative trial
Cereals
Vegetables
Mushrooms
Mussels
Fish
Algae
Descripción
Sumario:A collaborative trial was conducted to determine the performance characteristics of an analytical method for the quantification of inorganic arsenic (iAs) in food. The method is based on (i) solubilisation of the protein matrix with concentrated hydrochloric acid to denature proteins and allow the release of all arsenic species into solution, and (ii) subsequent extraction of the inorganic arsenic present in the acid medium using chloroform followed by back-extraction to acidic medium. The final detection and quantification is done by flow injection hydride generation atomic absorption spectrometry (FI-HG-AAS). The seven test items used in this exercise were reference materials covering a broad range of matrices: mussels, cabbage, seaweed (hijiki), fish protein, rice, wheat, mushrooms, with concentrations ranging from 0.074 to 7.55 mg kg−1. The relative standard deviation for repeatability (RSDr) ranged from 4.1 to 10.3%, while the relative standard deviation for reproducibility (RSDR) ranged from 6.1 to 22.8%.

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