Total alkalinity measurement using an open‐source platform

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 biogeochemical ecological variable enhanced not just by high measurement quality, but also accessibility. This research demonstrates an instrument that advances accessibility high-precision, high-accuracy total using open-source, low-cost instrumentation. Repeated testing samples from Lake Superior demonstrated precision (standard deviation or SD) 3.0 μmol kg−1. Analysis standards reference materials uncertainty 5.3 kg−1 well robustness freshwater saltwater matrices. adds wealth inorganic carbon technologies in marine lacustrine settings stands enhance ability both communities generate accurate accessible measurements alkalinity.