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A portable low cost coulometric micro-titrator for the determination of alkalinity in lake and sediment porewaters

Steinsberger, Thomas and Kathriner, Patrick and Meier, Philipp and Mistretta, Alexander and Hauser, Peter C. and Mueller, Beat. (2018) A portable low cost coulometric micro-titrator for the determination of alkalinity in lake and sediment porewaters. Sensors and actuators. B, Chemical, 255. pp. 3558-3563.

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Official URL: https://edoc.unibas.ch/74551/

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Abstract

Alkalinity is an important parameter in oceans, lakes, groundwaters and sediment porewaters as a link to the global carbon cycle. It is determined by classic titration with acid where sufficient sample volume is available. However, application to the limited amounts of sediment porewater requires a different approach. A portable low cost coulometric micro-titrator based on a RuO2 pH-sensitive electrode and a Ag/AgCl reference electrode requiring 50 pi of total sample volume is presented. By using a distinct sandwich cell design, a well-defined titration volume could be achieved. The micro-titrator performed well within the targeted range of 1-10 mmol (L-1) and a reproducibility within 3.5%. It was successfully applied to lake water and sediment porewater alkalinity measurements of Lake Lucerne and bears the potential for automation and in-situ applications.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Analytische Chemie (Hauser)
UniBasel Contributors:Hauser, Peter C. P. C.
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Elsevier
ISSN:0925-4005
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:11 Feb 2020 09:18
Deposited On:11 Feb 2020 09:18

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