Gas-diffusion-based passive sampler for ammonia monitoring in marine waters.

Autor: O'Connor Šraj L; Centre for Aquatic Pollution Identification and Management (CAPIM), School of Chemistry, The University of Melbourne, Victoria 3010, Australia., Almeida MIGS; Centre for Aquatic Pollution Identification and Management (CAPIM), School of Chemistry, The University of Melbourne, Victoria 3010, Australia., Bassett C; Centre for Aquatic Pollution Identification and Management (CAPIM), School of Chemistry, The University of Melbourne, Victoria 3010, Australia., McKelvie ID; Centre for Aquatic Pollution Identification and Management (CAPIM), School of Chemistry, The University of Melbourne, Victoria 3010, Australia; School of Geography, Earth and Environmental Science, Plymouth University, Plymouth PL4 8AA, United Kingdom., Kolev SD; Centre for Aquatic Pollution Identification and Management (CAPIM), School of Chemistry, The University of Melbourne, Victoria 3010, Australia. Electronic address: s.kolev@unimelb.edu.au.
Jazyk: angličtina
Zdroj: Talanta [Talanta] 2018 May 01; Vol. 181, pp. 52-56. Date of Electronic Publication: 2017 Dec 24.
DOI: 10.1016/j.talanta.2017.12.076
Abstrakt: A novel passive sampler based on gas-diffusion across a hydrophobic membrane is described for the determination of the time-weighted average concentration of dissolved molecular ammonia in high ionic strength aquatic environments, such as sea, coastal and estuarine waters, for a period of 3 days. The passive sampler developed is cheap, easy-to-use, reusable, and has a dynamic concentration range of 2.0-12µM, which covers the water quality guideline trigger value of 11.4µM (160µgL -1 NH 3 -N) for high conservation value waters, making this a powerful new tool for water quality managers involved in long-term ammonia monitoring. The gas-diffusion-based passive sampler was calibrated under laboratory conditions and deployed in a tank of seawater in the laboratory and at an estuarine site for proof of concept, and a good agreement between passive and spot sampling was achieved in both cases.
(Copyright © 2017 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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