Abstract
Total alkalinity is a pivotal water quality parameter dictating the response of natural waters to acid–base system perturbations such as ocean acidification and acid mine drainage. Its value as a biogeochemical and ecological variable is enhanced not just by high measurement quality, but also by measurement accessibility. This research demonstrates an instrument that advances the accessibility of high-precision, high-accuracy total alkalinity measurement using open-source, and low-cost instrumentation. Repeated testing of water samples from Lake Superior demonstrated a measurement precision (standard deviation or SD) of 3.0 μmol kg−1. Analysis of standards and reference materials demonstrated an uncertainty of 5.3 μmol kg−1 as well as robustness to freshwater and saltwater matrices. This instrument adds to the wealth of inorganic carbon measurement technologies in marine and lacustrine settings and stands to enhance the ability of both communities to generate accurate and accessible measurements of total alkalinity.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 334-344 |
| Number of pages | 11 |
| Journal | Limnology and Oceanography: Methods |
| Volume | 21 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 2023 |
Bibliographical note
Funding Information:The authors wish to thank Dr. Lucas Busta, Dr. Emily Bockmon, and Payton K. Kittaka for their invaluable suggestions benefitting this work. Thanks are also due to the Associate Editor and three anonymous reviewers who provided constructive comments and suggestions that improved this publication. This research was supported by a Grant‐in‐Aid from the University of Minnesota Office of the Vice President for Research to E.C.M. D.E.S. was supported by a Graduate Research Fellowship from the Cooperative Institute for Great Lakes Research. Funding for this project was provided by the University of Michigan Cooperative Institute for Great Lakes Research (CIGLR), through the National Oceanic and Atmospheric Administration (NOAA) Cooperative Agreement, NA17OAR4320152. This is CIGLR contribution 1207.
Funding Information:
The authors wish to thank Dr. Lucas Busta, Dr. Emily Bockmon, and Payton K. Kittaka for their invaluable suggestions benefitting this work. Thanks are also due to the Associate Editor and three anonymous reviewers who provided constructive comments and suggestions that improved this publication. This research was supported by a Grant-in-Aid from the University of Minnesota Office of the Vice President for Research to E.C.M. D.E.S. was supported by a Graduate Research Fellowship from the Cooperative Institute for Great Lakes Research. Funding for this project was provided by the University of Michigan Cooperative Institute for Great Lakes Research (CIGLR), through the National Oceanic and Atmospheric Administration (NOAA) Cooperative Agreement, NA17OAR4320152. This is CIGLR contribution 1207.
Publisher Copyright:
© 2023 The Authors. Limnology and Oceanography: Methods published by Wiley Periodicals LLC on behalf of Association for the Sciences of Limnology and Oceanography.
