%0 conference lecture %@ %A Przibilla, A., Zimmermann, T., Sanders, T., Wieser, M.E., Proefrock, D. %D 2023 %J 7th PhD Seminar of the German Working Group for Analytical Spectroscopy (DAAS) in the GDCh Division of Analytical Chemistry %T δ98/95Mo as tracer for past and current redox conditions in sediment samples from the Skagerrak %U %X %0 journal article %@ 1554-7531 %A Przibilla, A., Iwainski, S., Zimmermann, T., Pröfrock, D. %D 2023 %J Water Environment Research %N 9 %P e10922 %R doi:10.1002/wer.10922 %T Impact of storage temperature and filtration method on dissolved trace metal concentrations in coastal water samples %U https://doi.org/10.1002/wer.10922 9 %X Trace elements play a major role in biogeochemical cycles and oceanographic processes. To determine trace element concentrations, the dissolved and particulate phase are usually separated by filtration. However, the frequently used membrane filtration as well as sample storage can bias the dissolved elemental concentrations by adsorption or desorption/contamination. We present a comparison of two filtration methods for coastal and estuarine water samples (pressure filtration with Nuclepore™ polycarbonate filters, vacuum filtration with DigiFILTER™s) applied to aliquots of a large-volume coastal water sample that were stored at -18 °C or 4 °C for up to nine weeks. The filtrates were analyzed by seaFAST-ICP-MS for dissolved Cd, Ce, Co, Cu, Dy, Er, Eu, Fe, Ho, La, Mn, Mo, Nd, Pb, Pr, Sm, Tb, U, V, W, Y and Zn. The filtration blanks of DigiFILTER™s (0.0006 ± 0.0010 ng L-1 for Ho to 110 ± 180 ng L-1 for Zn) were sufficiently low for quantification of all analyzed elements with good repeatability, enabling a fast and reliable filtration of large sample sets of coastal water. However, the findings also highlight the need to measure procedural blanks including the filtration instead of only the instrument blanks to validate results. Measured concentrations of both filtration methods did not differ significantly for Cd, Cu, Mo, U, V, W, Zn but for other investigated elements, the ratio between both methods was up to 1.8 for Ce and 4.1 for Fe. Within nine weeks of storage, the elemental concentrations decreased significantly, resulting in losses of 20 % Mn in frozen samples and 63 % Pb, 64 % Co and 93 % Mn in cooled samples. %0 journal article %@ 2296-7745 %A Spiegel, T., Dale, A.W., Lenz, N., Schmidt, M., Sommer, S., Kalapurakkal, H.T., Przibilla, A., Lindhorst, S., Wallmann, K. %D 2023 %J Frontiers in Marine Science %P 1141448 %R doi:10.3389/fmars.2023.1141448 %T Biogenic silica cycling in the Skagerrak %U https://doi.org/10.3389/fmars.2023.1141448 %X Dissolved silicate (H4SiO4) is essential for the formation of the opaline skeletal structures of diatoms and other siliceous plankton. A fraction of particulate biogenic silica (bSi) formed in surface waters sinks to the seabed, where it either dissolves and returns to the water column or is permanently buried. Global silica budgets are still poorly constrained since data on benthic bSi cycling are lacking, especially on continental margins. This study describes benthic bSi cycling in the Skagerrak, a sedimentary depocenter for particles from the North Sea. Biogenic silica burial fluxes, benthic H4SiO4 fluxes to the water column and bSi burial efficiencies are reported for nine stations by evaluating data from in-situ benthic landers and sediment cores with a diagenetic reaction-transport model. The model simulates bSi contents and H4SiO4 concentrations at all sites using a novel power law to describe bSi dissolution kinetics with a small number of adjustable parameters. Our results show that, on average, 1100 mmol m-2 yr-1 of bSi rains down to the Skagerrak basin seafloor, of which 50% is released back to overlying waters, with the remainder being buried. Biogenic silica cycling in the Skagerrak is generally consistent with previously reported global trends, showing higher Si fluxes and burial efficiencies than deep-sea sites and similar values compared to other continental margins. A significant finding of this work is a molar bSi-to-organic carbon burial ratio of 0.22 in Skagerrak sediments, which is distinctively lower compared to other continental margins. We suggest that the continuous dissolution of bSi in suspended sediments transported over long distances from the North Sea leads to the apparent decoupling between bSi and organic carbon in Skagerrak sediments. %0 conference lecture %@ %A Przibilla, A., Sanders, T., Zimmermann, T., Schulz, G., Nantke, C., Pröfrock, D. %D 2023 %J Goldschmidt Conference 2023 %T Response of metal contaminated Skagerrak sediments to changing oxygen conditions %U %X %0 conference lecture %@ %A Przibilla, A., Iwainski, S., Zimmermann, T., Nantke, C., Pröfrock, D. %D 2023 %J 54th annual conference of the DGMS %T Analysis of dissolved trace metals in North Sea water: How to obtain reliable data using ICP-MS/MS? %U %X %0 conference lecture %@ %A Pröfrock, D., Przibilla, A., Klein, O., Hildebrandt, L., Ebeling, A., el Gareb, F., Rohrweber, A., Witthoff, C., Zimmermann, T. %D 2023 %J European Winter Conference on Plasma Spectrochemistry %T New Applications of ICP-MS/MS and MC ICP-MS to study the chemical anthropocene %U %X %0 conference lecture (invited) %@ %A Pröfrock, D., Przibilla, A., Klein, O., Hildebrandt, L., Ebeling, A., El Gareb, F., Zimmermann, T. %D 2022 %J 28. ICP-MS Anwender*innentreffen und 14. Symposium massenspektrometrische Verfahren der Elementspurenanalyse %T More than trace elements – New Applications for ICP-MS to investigate the chemical anthropocene %U %X %0 conference lecture %@ %A Wippermann, D., Ebeling, A., Przibilla, A., Zimmermann, T., Pröfrock, D. %D 2022 %J 28. ICP-MS Anwender*innentreffen und 14. Symposium massenspektrometrische Verfahren der Elementspurenanalyse %T Analytik von Meerwasserproben aus Offshore Windparks mittels ICP-MS unter Verwendung des Aufkonzentrierungssystems seaFAST® %U %X %0 conference lecture %@ %A Przibilla, A., Iwainski, S., Zimmermann, T., Pröfrock, D. %D 2022 %J ICP-MS Anwender*innen Treffen %T Aufbereitung von Meerwasserproben für die Messung der Metallgehalte mittels seaFAST-ICP-MS: Einfluss von Filtrationsmethode und Lagerung auf die Ergebnisse %U