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Uncertainty associated with the leaching of aerosol filters for the determination of metals in aerosol particulate matter using collision/reaction cell ICP-MS detection

Uncertainty associated with the leaching of aerosol filters for the determination of metals in aerosol particulate matter using collision/reaction cell ICP-MS detection
Uncertainty associated with the leaching of aerosol filters for the determination of metals in aerosol particulate matter using collision/reaction cell ICP-MS detection
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%.
0039-9140
425-430
Clough, Robert
3cd2d6d7-3b64-4192-b021-a71441e6222a
Lohan, Maeve C.
6ca10597-2d0f-40e8-8e4f-7619dfac5088
Ussher, Simon J.
089623db-1a7d-42b8-87d1-1f17395373b1
Nimmo, Malcolm
ab3eb7ca-fcc7-4436-be84-7413929a1da9
Worsfold, Paul J.
27675f89-7eee-45c5-821e-a381d8db9693
Clough, Robert
3cd2d6d7-3b64-4192-b021-a71441e6222a
Lohan, Maeve C.
6ca10597-2d0f-40e8-8e4f-7619dfac5088
Ussher, Simon J.
089623db-1a7d-42b8-87d1-1f17395373b1
Nimmo, Malcolm
ab3eb7ca-fcc7-4436-be84-7413929a1da9
Worsfold, Paul J.
27675f89-7eee-45c5-821e-a381d8db9693

Clough, Robert, Lohan, Maeve C., Ussher, Simon J., Nimmo, Malcolm and Worsfold, Paul J. (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, 425-430. (doi:10.1016/j.talanta.2019.02.067).

Record type: Article

Abstract

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%.

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Accepted/In Press date: 17 February 2019
e-pub ahead of print date: 19 February 2019
Published date: 1 July 2019

Identifiers

Local EPrints ID: 430987
URI: https://eprints.soton.ac.uk/id/eprint/430987
ISSN: 0039-9140
PURE UUID: 0b1381a7-071a-419e-b18d-c37a138e78a8

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Date deposited: 21 May 2019 16:30
Last modified: 02 Dec 2019 17:37

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Contributors

Author: Robert Clough
Author: Maeve C. Lohan
Author: Simon J. Ussher
Author: Malcolm Nimmo
Author: Paul J. Worsfold

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