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Estimation of Measurement Uncertainties for the DGT Passive Sampler Used for Determination of Copper in Water

Jesper Knutsson (Institutionen för bygg- och miljöteknik, Vatten Miljö Teknik) ; Sebastien Rauch (Institutionen för bygg- och miljöteknik, Vatten Miljö Teknik) ; Greg Morrison (Institutionen för bygg- och miljöteknik, Vatten Miljö Teknik)
International Journal of Analytical Chemistry (1687-8760). Vol. 2014 (2014), p. 7.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: passive sampling uncertainty



Denna post skapades 2014-09-03. Senast ändrad 2015-05-25.
CPL Pubid: 202263

 

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