PRODUCT SHEET ANALYZER FOR TOTAL ALKALINITY IN SEAWATER Characterizing the marine carbonate system to the level of accuracy required by marine scientists Total alkalinity, or the buffer capacity, is an important sum parameter for many scientific and commercial fields of application. The CONTROS HydroFIA™ TA is a flow through system for the determination of the total alkalinity in seawater. AUTONOMOUS ANALYSIS The analyzer can be used for continuous monitoring during surface water applications as well as for discrete sample measurements. As an autonomous TA analyzer, it can also be easily integrated into existing automated measuring systems on Voluntary Observing Ships (VOS) such as FerryBoxes. OPERATING PRINCIPLE A defined amount of seawater is acidified by injection of a fixed amount of hydrochloric acid (HCl). After acidification the generated CO2 in the sample is removed by means of a a field-proven TOUGH membrane based degassing unit, which results in a opencell titration. The subsequent pH determination is carried out by means of an indicator dye (Bromocresol Green) and VIS absorption spectrometry. Together with salinity and temperature, the resulting pH is directly used for the calculation of total alkalinity. The CONTROS HydroFIA™ TA analyzer was motivated and supported by initial investigations carried out at the Helmholtz Centre for Ocean Research Kiel (GEOMAR) and the Helmholtz-Zentrum Geesthacht (HZG). I ntegration into automated measuring systems on VOS C ross-flow filters for high turbidity / sediment loaded waters E xtended working range of 1000

PRODUCT SHEET CONTROS HydroFIA™ TA APPLICATIONS The CONTROS HydroFIA™ TA is trusted to deliver precise results for diverse applications, including: ● O cean acidification and carbonate chemistry research Monitoring of biogeochemical processes Aquaculture monitoring M easurement cycles of less than 10 min R obust and proven pH determination using absorption spectrometry