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Using single particle ICP-MS for monitoring metal-containing particles in tap waters

Abstract

Engineered, natural or incidental colloidal sized materials in tap water may originate from source waters or be generated in distribution systems (e.g., corrosion related). An optimized single particle (sp)-ICP-MS technique was applied to tap waters (n = 50) collected from three buildings to analyze for Pb, Fe, Sn, Cu, Ag and Ti-containing particles. Pb, Sn and Fe-containing particles were detected at an average concentration (ng/L) of 1.2 (range: 0.06 – 4.8), 1.8 (range: 0.11 – 14), and 88 (range: 26 – 890), respectively, representing at a minimum 0.4 %, 10 %, and 15 % of the corresponding total dissolved metal concentrations. No particulate Ti and Ag was observed in samples. Pb concentrations in the first 125 mL fraction collected was on average three times higher than the subsequent samples. Detection of Cu particles required modification of the sample introduction system (direct self-aspiration into nebulizer) to reduce matrix interaction with auto-sampler tubing. Cu-particles were detected in 50 % of analyzed samples at an average concentration of 69 (range: 15 – 136) ng/L. While all metal concentrations were below health advisory levels, this study showcases the feasibility and first application of spICP-MS to monitor metal-containing particles in tap waters, and the results suggest that the particulate forms of the studied elements may represent a significant fraction of the bulk elemental concentration in tap waters.

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Publication details

The article was received on 12 Jul 2018, accepted on 12 Sep 2018 and first published on 12 Sep 2018


Article type: Paper
DOI: 10.1039/C8EW00478A
Citation: Environ. Sci.: Water Res. Technol., 2018, Accepted Manuscript
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    Using single particle ICP-MS for monitoring metal-containing particles in tap waters

    A. Venkatesan, B. Rodriguez, A. Marcotte, X. Bi, J. Schoepf, J. F. Ranville, P. Herckes and P. Westerhoff, Environ. Sci.: Water Res. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C8EW00478A

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