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Meyer, D. ., Leibniz Institute for Baltic Sea Research, Rostock, Germany, david.meyer@io-warnemuende.de
Prien, R. D., Leibniz Institute for Baltic Sea Research, Rostock, Germany, ralf.prien@io-warnemuende.de
Dellwig, O. ., Leibniz Institute for Baltic Sea Research, Rostock, , olaf.dellwig@io-warnemuende.de
Schulz-Bull, D. E., Leibniz Institute for Baltic Sea Research, Rostock, Germany, detlef.schulz-bull@io-warnemuende.de

HIGH RESOLUTION DATA FOR DISSOLVED MANGANESE(II) IN THE WATER COLUMN OF THE CENTRAL BALTIC SEA USING A NEW WET CHEMICAL IN SITU ANALYZER

Manganese plays an important role in the biogeochemistry of stratified marine environments. In the Central Baltic Sea where stratification separates oxygenated from anoxic waters Mn is mainly present in two oxidation states, which are thermodynamically stable under oxic [Mn(IV)] and anoxic [Mn(II)] conditions, respectively. Continuous flow analysis for soluble Mn(II) species in the water column was performed with a colorimetric method using 1-(2ยด-pyridylazo)-2-naphtol (PAN) as a spectrophotometric reagent. PAN is a widely used azo dye and has a rapid color formation. In the Baltic Proper the primary potential interferents are Fe(III) and Fe(II) respectively. The iron-specific chelating agent deferoxamine (DFO) was used to avoid any interference. The long-term goal is a deeper insight into the dynamics of the concentration distributions of Mn(II). The kinetics of episodic events and their transition phases in the biogeochemical cycle of manganese could be accurately documented by high-resolution measurements of the wet-chemical analyzer used in this study.

Poster presentation

Session #:148
Date: 2/22/2012
Time: 17:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: Yes

PosterID: A0337