We use a PDZ Europa 2020 Mass Spectrometer (MS-2020; now supplied by Sercon Ltd., UK) with a coupled self-constructed laser fluorination line for analyzing stable oxygen isotopes in biogenic silica samples (diatoms, radiolaria, sponge spicules). Our research focuses mainly on Arctic lake systems. For measuring stable oxygen isotopes in biogenic silica, a sediment sample undergoes several preparation steps including wet chemistry and heavy liquid separation to achieve a pure opal sample (> 97% …

Three Finnigan MAT Delta-S Mass Spectrometers are used for Stable Water Isotope Analytics (δ¹⁸O, δD) in the Stable Isotope Laboratory at AWI Potsdam since many years. The widely identical mass spectrometers are coupled with two equilibration units each to measure hydrogen and oxygen isotopes of water and ice samples. The equilibration technique uses thermally constant GFL water shaking baths units. Hydrogen and oxygen isotopes of water and ice samples are measured from the same aliquot (ca. 3 …