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The quality of the aquatic and marine environment can be monitored by the detemining of pollutants in organisms living in this environment. Certified reference materials and well-organized proficiency tests are powerful means of ensuring a constant level of quality and verifying the correct application of standardized methods. This paper describes the preparation of a tuna fish proficiency testing material for the evaluation of quality of As and Hg monitoring in seafood. Preparation and characterization of the material as well as studies on its homogeneity and stability are described. Concentrations of 3.4 +/- 0.2 ug/g total arsenic and 2.91 +/- 0.09 ug/g total mercury have been determined as target values. Moreover indicative values for some trace elements (Cd, Cu, Ni, Pb, Sr) and some major constituents (Al, Br, C, Ca, Cl, Fe, H, K , Mg, N , Na, P, S, Si, Zn) have also been measured.

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Authors: GAWLIK B, JRC Ispra (IT);MUNTAU H, JRC Ispra (IT);DRUGES M, Thomson Microelectronics, Crolles (FR);BIANCHI M, Ecoconsult, Gavirate (IT);BORTOLI A, ULSS 12, Presidio Multizonale di Prevenzione, Venice (IT);KETTRUP A, GSF Forschungszentrum für Umwelt und Gesundheit, Institut für Ökologische Chemie, Oberschleissheim (DE)
Bibliographic Reference: Article: Fresenius Journal of Analytical Chemistry (1997)
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