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http://hdl.handle.net/10773/17301
Title: | An international proficiency test as a tool to evaluate mercury determination in environmental matrices |
Author: | Reis, Ana Teresa Duarte, Armando C. Henriques, Bruno Coelho, Cláudia Lopes, Cláudia Batista Mieiro, Cláudia L. Tavares, Daniela Santos Ahmad, Lqbal Coelho, João Pedro Rocha, Luciana Sarabando Cruz, Nuno Monteiro, Rui J. R. Rocha, Rui Rodrigues, Sónia Pereira, Eduarda |
Keywords: | Fish Homogeneity test Human hair Interlaboratory exercise Mercury extraction Proficiency test Sediment Soil Total mercury z-score |
Issue Date: | 2015 |
Publisher: | Elsevier |
Abstract: | We report on an international proficiency test (PT) scheme for mercury (Hg) determination in soil, sediment, fish and human-hair samples (ILAE-Hg-02). For total-Hg determination, 74% of participants had a satisfactory performance (|z-score| ≤ 2), 8% had a questionable performance and 18% required action (|z-score| > 3). The best results were obtained for soil, while fish yielded the most-biased results, reflecting the analytical problems of quantifying Hg at low concentrations. Proficiency in the extraction of organometallic and available metal fractions was an important goal of the ILAE-Hg-02 and it was concluded that most laboratories are still not acquainted with the procedures for Hg fractionation; we therefore discuss their importance and highlight the need for more PT schemes dedicated to this matter, as they are an important tools in the standardization of procedures and for the development of adequate quality control/quality analysis protocols and certified reference materials. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/17301 |
DOI: | 10.1016/j.trac.2014.08.015 |
ISSN: | 0165-9936 |
Appears in Collections: | CESAM - Artigos DQ - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Reis et al. - 2015 - An international proficiency test as a tool to eva.pdf | 589.13 kB | Adobe PDF |
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