State of the art in the determination of trace elements in seawater: a worldwide proficiency test

Analytical and Bioanalytical Chemistry
Pieter DehouckBeatriz de la Calle

Abstract

This manuscript presents the results of the International Measurement Evaluation Programme 40 (IMEP-40) study, a proficiency test (PT) which was organised to assess the worldwide performance of laboratories for the determination of trace elements in seawater. This PT supports the implementation of the European Union Water Framework Directive 2000/60/EC, which aims at achieving a long-term high level protection of the aquatic environment, covering lakes, ground water and coastal waters. Forty-six participants reported results. The test item was seawater containing the trace elements As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Se and Zn. The trace elements in the test item were present in very low concentrations to mimic natural levels. The results of the participants were rated with z and zeta (ζ) scores in accordance with ISO 13528 and ISO 17043. The standard deviation for proficiency assessment, [Formula: see text], was set at 25 % of the respective assigned values for the 12 measured elements based on previous experience with similar PTs. The low levels of the trace elements combined with the high salt concentration of the seawater made the measurements challenging. Many laboratories were unable to detect or quantify the elements...Continue Reading

References

Jun 1, 1996·Analytical and Bioanalytical Chemistry·A Vraná, J Komárek
Nov 5, 2014·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·F CordeiroM B de la Calle

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atomic absorption spectroscopy
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