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Fiamegkos I, Cordeiro F, Robouch P, Vélez D, Devesa V, Raber G, Sloth JJ, Rasmussen RR, Llorente-Mirandes T, Lopez-Sanchez JF, Rubio R, Cubadda F, D'Amato M, Feldmann J, Raab A, Emteborg H, de la Calle MB. Accuracy of a method based on atomic absorption spectrometry to determine inorganic arsenic in food: Outcome of the collaborative trial IMEP-41. Food Chem 2016; 213:169-179. [PMID: 27451169 DOI: 10.1016/j.foodchem.2016.06.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 03/22/2016] [Accepted: 06/12/2016] [Indexed: 10/21/2022]
Abstract
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 7.55mgkg(-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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Affiliation(s)
- I Fiamegkos
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, 111 Retieseweg, 2440 Geel, Belgium
| | - F Cordeiro
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, 111 Retieseweg, 2440 Geel, Belgium
| | - P Robouch
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, 111 Retieseweg, 2440 Geel, Belgium
| | - D Vélez
- Metal Contamination Laboratory (IATA-CSIC), Avd. Agustín Escardino 7, 46980 Paterna, Valencia, Spain
| | - V Devesa
- Metal Contamination Laboratory (IATA-CSIC), Avd. Agustín Escardino 7, 46980 Paterna, Valencia, Spain
| | - G Raber
- Institute of Chemistry, University of Graz, Universitätsplatz 1, 8010 Graz, Austria
| | - J J Sloth
- Technical University of Denmark, National Food Institute, Division of Food Chemistry, Mørkhøj Bygade 19, 2860 Søborg, Denmark
| | - R R Rasmussen
- Technical University of Denmark, National Food Institute, Division of Food Chemistry, Mørkhøj Bygade 19, 2860 Søborg, Denmark
| | - T Llorente-Mirandes
- Department of Analytical Chemistry, University of Barcelona, Martí I Franque's 1-11, 08028 Barcelona, Spain
| | - J F Lopez-Sanchez
- Department of Analytical Chemistry, University of Barcelona, Martí I Franque's 1-11, 08028 Barcelona, Spain
| | - R Rubio
- Department of Analytical Chemistry, University of Barcelona, Martí I Franque's 1-11, 08028 Barcelona, Spain
| | - F Cubadda
- Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità-Italian National Health Institute, Viale Regina Elena 299, 00161 Rome, Italy
| | - M D'Amato
- Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità-Italian National Health Institute, Viale Regina Elena 299, 00161 Rome, Italy
| | - J Feldmann
- Trace Element Speciation Laboratory (TESLA), University of Aberdeen, College of Physical Science, Chemistry, Meston Walk, Aberdeen AB24 3UE, Scotland, United Kingdom
| | - A Raab
- Trace Element Speciation Laboratory (TESLA), University of Aberdeen, College of Physical Science, Chemistry, Meston Walk, Aberdeen AB24 3UE, Scotland, United Kingdom
| | - H Emteborg
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, 111 Retieseweg, 2440 Geel, Belgium
| | - M B de la Calle
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, 111 Retieseweg, 2440 Geel, Belgium.
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Cordeiro F, Llorente-Mirandes T, López-Sánchez J, Rubio R, Sánchez Agullo A, Raber G, Scharf H, Vélez D, Devesa V, Fiamegos Y, Emteborg H, Seghers J, Robouch P, de la Calle M. Determination of total cadmium, lead, arsenic, mercury and inorganic arsenic in mushrooms: outcome of IMEP-116 and IMEP-39. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2014; 32:54-67. [PMID: 25365736 PMCID: PMC4299854 DOI: 10.1080/19440049.2014.966336] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 09/12/2014] [Indexed: 12/04/2022]
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 inter-laboratory 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.
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Affiliation(s)
- F. Cordeiro
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel, Belgium
| | | | - J.F. López-Sánchez
- Department of Analytical Chemistry, University of Barcelona, Barcelona, Spain
| | - R. Rubio
- Department of Analytical Chemistry, University of Barcelona, Barcelona, Spain
| | | | - G. Raber
- Institute of Chemistry, Karl Franzes University Graz, Graz, Austria
| | - H. Scharf
- BAM Federal Institute for Materials Research and Testing, Division 1.6: Inorganic Reference Materials, Berlin, Germany
| | - D. Vélez
- Metal Contamination Laboratory (IATA-CSIC), Paterna, Valencia, Spain
| | - V. Devesa
- Metal Contamination Laboratory (IATA-CSIC), Paterna, Valencia, Spain
| | - Y. Fiamegos
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel, Belgium
| | - H. Emteborg
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel, Belgium
| | - J. Seghers
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel, Belgium
| | - P. Robouch
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel, Belgium
| | - M.B. de la Calle
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel, Belgium
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de la Calle MB, Baer I, Robouch P, Cordeiro F, Emteborg H, Baxter MJ, Brereton N, Raber G, Velez D, Devesa V, Rubio R, Llorente-Mirandes T, Raab A, Feldmann J, Sloth JJ, Rasmussen RR, D'Amato M, Cubadda F. Is it possible to agree on a value for inorganic arsenic in food? The outcome of IMEP-112. Anal Bioanal Chem 2012; 404:2475-88. [PMID: 22986988 DOI: 10.1007/s00216-012-6398-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 08/24/2012] [Accepted: 08/29/2012] [Indexed: 11/24/2022]
Abstract
Two of the core tasks of the European Union Reference Laboratory for Heavy Metals in Feed and Food (EU-RL-HM) are to provide advice to the Directorate General for Health and Consumers (DG SANCO) on scientific matters and to organise proficiency tests among appointed National Reference Laboratories. This article presents the results of the 12th proficiency test organised by the EU-RL-HM (IMEP-112) that focused on the determination of total and inorganic arsenic in wheat, vegetable food and algae. The test items used in this exercise were: wheat sampled in a field with a high concentration of arsenic in the soil, spinach (SRM 1570a from NIST) and an algae candidate reference material. Participation in this exercise was open to laboratories from all around the world to be able to judge the state of the art of the determination of total and, more in particular, inorganic arsenic in several food commodities. Seventy-four laboratories from 31 countries registered to the exercise; 30 of them were European National Reference Laboratories. The assigned values for IMEP-112 were provided by a group of seven laboratories expert in the field of arsenic speciation analysis in food. Laboratory results were rated with z and ζ scores (zeta scores) in accordance with ISO 13528. Around 85 % of the participants performed satisfactorily for inorganic arsenic in vegetable food and 60 % did for inorganic arsenic in wheat, but only 20 % of the laboratories taking part in the exercise were able to report satisfactory results in the algae test material.
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Affiliation(s)
- M B de la Calle
- European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg, Geel, Belgium.
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