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    Estimation of measurement uncertainties for the DGT passive sampler used for determination of copper in water

    Access Status
    Open access via publisher
    Authors
    Knutsson, J.
    Rauch, S.
    Morrison, Gregory
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Knutsson, J. and Rauch, S. and Morrison, G. 2014. Estimation of measurement uncertainties for the DGT passive sampler used for determination of copper in water. International Journal of Analytical Chemistry. 2014.
    Source Title
    International Journal of Analytical Chemistry
    DOI
    10.1155/2014/389125
    ISSN
    1687-8760
    School
    Sustainability Policy Institute
    URI
    http://hdl.handle.net/20.500.11937/32336
    Collection
    • Curtin Research Publications
    Abstract

    © 2014 Jesper Knutsson et al. Diffusion-based passive samplers are increasingly used for water quality monitoring. While the overall method robustness and reproducibility for passive samplers in water are widely reported, there has been a lack of a detailed description of uncertainty sources. In this paper an uncertainty budget for the determination of fully labile Cu in water using a DGT passive sampler is presented. Uncertainty from the estimation of effective cross-sectional diffusion area and the instrumental determination of accumulated mass of analyte are the most significant sources of uncertainty, while uncertainties from contamination and the estimation of diffusion coefficient are negligible. The results presented highlight issues with passive samplers which are important to address if overall method uncertainty is to be reduced and effective strategies to reduce overall method uncertainty are presented.

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