Berlin 2005 – wissenschaftliches Programm
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MS: Massenspektrometrie
MS 4: Massenspektrometrische Verfahren
MS 4.1: Hauptvortrag
Freitag, 4. März 2005, 16:30–17:00, HU 3088
Investigation of actinide-oligomers and colloids by electrospray-mass-spectrometry — •Clemens Walther1, Markus Fuss1, Sergej Koltsov2 und Thorald Bergmann3 — 1Institut für Nukleare Entsorgung, Forschungszentrum Karlsruhe, Postfach 3640, 76021 Karlsruhe — 2Institute for Analytical Instrumentation, Russian Academy of Sciences, 198103 St. Petersburg, Rizhsky st. 26 — 3BME KG, Bahnhofstr. 14, 82418 Murnau
Tetravalent actinides and their homologues exhibit a strong tendency towards formation of polynuclear species in solution. At the same time the highly charged ions readily undergo hydrolysis. The formation process of colloids is followed by investigating the different steps from the ’free’ hydrated ion at very acidic conditions via hydrolised species and oligomers towards nm-sized-colloids. A recent modification of the ’BME-Albatros’ system will allow to study the element-composition of small colloids by means of trapping and laser vaporisation prior to the TOF-MS.