Estimation of Measurement Uncertainties for the DGT Passive Sampler Used for Determination of Copper in Water
Artikel i vetenskaplig tidskrift, 2014

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.

passive sampling uncertainty

Författare

Jesper Knutsson

Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik

Sebastien Rauch

Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik

Greg Morrison

Chalmers, Bygg- och miljöteknik, Vatten Miljö Teknik

International Journal of Analytical Chemistry

1687-8760 (ISSN) 1687-8779 (eISSN)

Vol. 2014 7- 389125

Drivkrafter

Hållbar utveckling

Ämneskategorier

Analytisk kemi

Miljövetenskap

DOI

10.1155/2014/389125