Alkalinity of diverse water samples can be altered by mercury preservation and borosilicate vial storage

Abstract We compared the effects of preservation and storage methods on total alkalinity (AT) of seawater, estuarine water, freshwater, and groundwater samples stored for 0–6 months. Water samples, untreated or treated with HgCl2, 0.45 µm filtration, or filtration plus HgCl2, were stored in polyprop...

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Autores principales:	Benjamin Mos, Ceylena Holloway, Brendan P. Kelaher, Isaac R. Santos, Symon A. Dworjanyn
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7c0df300ece94508b46a1ea6eccfd2e7
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spelling	oai:doaj.org-article:7c0df300ece94508b46a1ea6eccfd2e72021-12-02T16:57:37ZAlkalinity of diverse water samples can be altered by mercury preservation and borosilicate vial storage10.1038/s41598-021-89110-w2045-2322https://doaj.org/article/7c0df300ece94508b46a1ea6eccfd2e72021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89110-whttps://doaj.org/toc/2045-2322Abstract We compared the effects of preservation and storage methods on total alkalinity (AT) of seawater, estuarine water, freshwater, and groundwater samples stored for 0–6 months. Water samples, untreated or treated with HgCl2, 0.45 µm filtration, or filtration plus HgCl2, were stored in polypropylene or borosilicate glass vials for 0, 1, or 6 months. Mean AT of samples treated with HgCl2 was reduced by as much as 49.1 µmol kg−1 (1.3%). Borosilicate glass elevated AT, possibly due to dissolving silicates. There was little change in AT of control and filtered samples stored in polypropylene, except for untreated groundwater (~ 4.1% reduction at 6 months). HgCl2 concentrations of 0.02–0.05% reduced the AT of fresh, estuarine, and ground water samples by as much as 35.5 µmol kg−1 after 1 month, but had little effect on the AT of seawater. Adding glucose as a carbon source for microbial growth resulted in no AT changes in 0.45 µm-filtered samples. We suggest water samples intended for AT analyses can be filtered to 0.45 µm, and stored in polypropylene vials at 4 °C for at least 6 months. Borosilicate glassware and HgCl2 can be avoided to prevent analytical uncertainties and reduce risks related to use of Hg2+.Benjamin MosCeylena HollowayBrendan P. KelaherIsaac R. SantosSymon A. DworjanynNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Benjamin Mos Ceylena Holloway Brendan P. Kelaher Isaac R. Santos Symon A. Dworjanyn Alkalinity of diverse water samples can be altered by mercury preservation and borosilicate vial storage
description	Abstract We compared the effects of preservation and storage methods on total alkalinity (AT) of seawater, estuarine water, freshwater, and groundwater samples stored for 0–6 months. Water samples, untreated or treated with HgCl2, 0.45 µm filtration, or filtration plus HgCl2, were stored in polypropylene or borosilicate glass vials for 0, 1, or 6 months. Mean AT of samples treated with HgCl2 was reduced by as much as 49.1 µmol kg−1 (1.3%). Borosilicate glass elevated AT, possibly due to dissolving silicates. There was little change in AT of control and filtered samples stored in polypropylene, except for untreated groundwater (~ 4.1% reduction at 6 months). HgCl2 concentrations of 0.02–0.05% reduced the AT of fresh, estuarine, and ground water samples by as much as 35.5 µmol kg−1 after 1 month, but had little effect on the AT of seawater. Adding glucose as a carbon source for microbial growth resulted in no AT changes in 0.45 µm-filtered samples. We suggest water samples intended for AT analyses can be filtered to 0.45 µm, and stored in polypropylene vials at 4 °C for at least 6 months. Borosilicate glassware and HgCl2 can be avoided to prevent analytical uncertainties and reduce risks related to use of Hg2+.
format	article
author	Benjamin Mos Ceylena Holloway Brendan P. Kelaher Isaac R. Santos Symon A. Dworjanyn
author_facet	Benjamin Mos Ceylena Holloway Brendan P. Kelaher Isaac R. Santos Symon A. Dworjanyn
author_sort	Benjamin Mos
title	Alkalinity of diverse water samples can be altered by mercury preservation and borosilicate vial storage
title_short	Alkalinity of diverse water samples can be altered by mercury preservation and borosilicate vial storage
title_full	Alkalinity of diverse water samples can be altered by mercury preservation and borosilicate vial storage
title_fullStr	Alkalinity of diverse water samples can be altered by mercury preservation and borosilicate vial storage
title_full_unstemmed	Alkalinity of diverse water samples can be altered by mercury preservation and borosilicate vial storage
title_sort	alkalinity of diverse water samples can be altered by mercury preservation and borosilicate vial storage
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7c0df300ece94508b46a1ea6eccfd2e7
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Alkalinity of diverse water samples can be altered by mercury preservation and borosilicate vial storage

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