References 1:Steininger, F.; Revsbech, N.P.; Koren, K. Total Dissolved Inorganic Carbon Sensor Based on Amperometric CO 2 Microsensor and Local Acidification ACS Sensors, 2021, 6 (7), 2529–2533 2: Koren, K.; Zieger, S.E. Optode Based Chemical Imaging—Possibilities, Challenges, and New Avenues in Multidimensi- onal Optical Sensing ACS Sensors, 2021, 6 (5), 1671-1680 Find out more: watec.au.dk GRUNDFOS FOUNDATION RESEARCH Sensors at work inside a sediment Photo: AU Pushing the limits The team’s ambition is to develop sen- sors that are useful within both natural and engineered aquatic environments (e.g. wastewater treatment systems) and push the limits. - In a recent study [1], we developed the first sensor to measure total dissolved inorganic carbon (DIC) in water. This is important as DIC levels change due to anthropogenic CO2 emissions. Our sensor could help better understand the effects this has without the need of taking samples, says Klaus Koren. Furthermore, the researchers use advanced imaging methods. - Via imaging, we can make chemistry visible [2]. In this way we can find chemical hotspots and see how ana - lytes of interest are transported within the environment, says Klaus Koren. To come back to our own senses, we all know how hard it is to find our way in the darkness. In the same way, without suitable sensors we are left in the dark when it comes to understand- ing the chemistry of our environment. New sensors can provide reliable monitoring and visualisation of what is going on in our aquatic environments, helping both regulators and operators make fact-based decisions. 43
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