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Title: Determination of total cadmium, lead, arsenic, mercury and inorganic arsenic in mushrooms: outcome of IMEP-116 and IMEP-39
Author: Cordeiro, Fernando
Llorente Mirandes, Antoni
López Sánchez, José Fermín
Rubio i Rovira, Roser
Sánchez Agullo, A.
Raber, G.
Scharf, H.
Vélez, D.
Devesa, V.
Fiamegos, Y.
Emteborg, H.
Seghers, J.
Robouch, P.
Calle, M. B. de la
Keywords: Anàlisi de traces
Bolets comestibles
Trace analysis
Edible mushrooms
Issue Date: 1-Jan-2015
Publisher: Taylor and Francis
Abstract: The Institute for Reference Materials and Measurements (IRMM) of the Joint Research Centre (JRC), a Directorate General of the European Commission, operates the International Measurement Evaluation Program (IMEP). IMEP organises interlaboratory comparisons in support of European Union policies. This paper presents the results of two proficiency tests (PTs): IMEP-116 and IMEP-39, organised for the determination of total Cd, Pb, As, Hg and inorganic As (iAs) in mushrooms. Participation in IMEP-116 was restricted to National Reference Laboratories (NRLs) officially appointed by national authorities in European Union member states. IMEP-39 was open to all other laboratories wishing to participate. Thirty seven participants from 25 countries reported results in IMEP-116, and 62 laboratories from 36 countries reported for the IMEP-39 study. Both PTs were organised in support to Regulation (EC) No. 1881/2006, which sets the maximum levels for certain contaminants in food. The test item used in both PTs was a blend of mushrooms of the variety shiitake (Lentinula edodes). Five laboratories, with demonstrated measurement capability in the field, provided results to establish the assigned values (Xref). The standard uncertainties associated to the assigned values (uref) were calculated by combining the uncertainty of the characterisation (uchar) with a contribution for homogeneity (ubb) and for stability (ust), whilst uchar was calculated following ISO 13528. Laboratory results were rated with z- and zeta (ζ)-scores in accordance with ISO 13528. The standard deviation for proficiency assessment, σp, ranged from 10% to 20% depending on the analyte. The percentage of satisfactory z scores ranged from 81% (iAs) to 97% (total Cd) in IMEP-116 and from 64% (iAs) to 84% (total Hg) in IMEP-39.
Note: Versió postprint del document publicat a:
It is part of: Food Additives & Contaminants: Part A, 2015, vol. 32, num. 1, p. 54-67
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ISSN: 0265-203X
Appears in Collections:Articles publicats en revistes (Enginyeria Química i Química Analítica)

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