A portable low cost coulometric micro-titrator for the determination of alkalinity in lake and sediment porewaters
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 4493379
Author(s) Steinsberger, Thomas; Kathriner, Patrick; Meier, Philipp; Mistretta, Alexander; Hauser, Peter C.; Mueller, Beat
Author(s) at UniBasel Hauser, Peter C.
Year 2018
Title A portable low cost coulometric micro-titrator for the determination of alkalinity in lake and sediment porewaters
Journal Sensors and actuators. B, Chemical
Volume 255
Pages / Article-Number 3558-3563
Keywords Alkalinity; Micro-titrator; Porewater; Lakes; Sediment
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.
Publisher Elsevier
ISSN/ISBN 0925-4005
edoc-URL https://edoc.unibas.ch/74551/
Full Text on edoc No
Digital Object Identifier DOI 10.1016/j.snb.2017.09.191
ISI-Number 000414686500131
Document type (ISI) Article
 
   

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