ORCID
- Ussher, Simon: 0000-0001-6724-9212
- Worsfold, Paul: 0000-0002-2262-7723
Abstract
© 2019 Elsevier B.V. High quality observational data with a firm uncertainty assessment are essential for the proper validation of biogeochemical models for trace metals such as iron. Typically, concentrations of these metals are very low in oceanic waters (nM and sub nM) and ICP-MS is therefore a favoured technique for quantitative analysis. Uncertainties in the measurement step are generally well constrained, even at sub-nM concentrations. However, the measurement step is only part of the overall procedure. For the determination of trace metal solubilities from aerosols in the surface ocean, aerosol collection on a filter paper followed by a leaching procedure is likely to make a significant contribution to the overall uncertainty. This paper quantifies the uncertainties for key trace metals (cobalt, iron, lead and vanadium), together with aluminium as a reference element, for a controlled, flow through laboratory leaching procedure using filters collected from three different sampling sites (Tudor Hill (Bermuda), Heraklion (Crete) and Tel-Shikmona (Israel)) and water, glucuronic acid and desferrioxamine B as leachants. Relative expanded uncertainties were in the range of 12–29% for cobalt, 12–62% for iron, 13–45% for lead and 5–11% for vanadium. Fractional solubilities for iron ranged from 0.2 ± 0.1% to 16.9 ± 3.5%.
DOI
10.1016/j.talanta.2019.02.067
Publication Date
2019-07-01
Publication Title
Talanta
Volume
199
First Page
425
Last Page
430
ISSN
0039-9140
Embargo Period
2020-02-19
Organisational Unit
School of Geography, Earth and Environmental Sciences
Recommended Citation
Clough, R., Lohan, M., Ussher, S., Nimmo, M., & Worsfold, P. (2019) 'Uncertainty associated with the leaching of aerosol filters for the determination of metals in aerosol particulate matter using collision/reaction cell ICP-MS detection', Talanta, 199, pp. 425-430. Available at: https://doi.org/10.1016/j.talanta.2019.02.067
