An Automated Microfluidic Analyzer for In Situ Monitoring of Total Alkalinity.

ABSTRACT: We have designed, built, tested, and deployed an autonomous in situ analyzer for seawater total alkalinity. Such analyzers are required to understand the ocean carbon cycle, including anthropogenic carbon dioxide (CO₂) uptake and for mitigation efforts via monitoring, reporting, and verification of carbon dioxide removal through ocean alkalinity enhancement. The microfluidic nature of our instrument makes it relatively lightweight, reagent efficient, and amenable for use on platforms that would carry it on long-term deployments. Our analyzer performs a series of onboard closed-cell titrations with three independent stepper-motor driven syringe pumps, providing highly accurate mixing ratios that can be systematically swept through a range of pH values. Temperature effects

SUBMITTER: Sonnichsen C 

PROVIDER: S-EPMC9888396 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature