Inductively coupled plasma mass spectrometric detection for multielement flow injection analysis and elemental speciation by reversed-phase liquid chromatography

The feasibility of using an inductively coupled plasma mass spectrometer as a muitieiement detector for flow injection analysis (FIA) and ion-pair reversed-phase liquid chromatography was investigated. Sample introduction was by uitrasonk nebulization with aerosol desolvation. Absolute detecton limits for FIA ranged from 0.01 to 0.1 ng for most elements using 10-pL injections. Over 30 elements were surveyed for their response to both anionic and cationic ion pairing reagents. The separation and selective detection of various As and Se species were demonstrated, yielding detection limits near 0.1 ng (as element) for ail six species present. Determination of 15 elements in a single injection with multiple ion monitoring produced shniiar detection limits. Isotope ratios were measured with sufficient precision (better than 2%) and accuracy (about 1 %) on eluting peaks of Cd and Pb to demonstrate that liquid chromatographyhductively coupled plasma mass spectrometry should make speciation studies with stable tracer isotopes feasible

Beiträge zur Umweltforschung und Umweltüberwachung II: Präparative Darstellung von 237^{237}Pu und orientierende Vorversuche zur Bioakkumulation in Süßalgen und Seewasseralgen

The ${237}$Pu-production is performed by irradiation of an $^{235}$U target (93 % $^{235}$U) with $\alpha$-particles in an Isochroncyclotron (optimal energy 70 MeV). The design of the used targets, their performance under the applied irradiation conditions together with the dissolution and the radiochemical separation andpurification steps is described. Preliminary bioaccumulation experiments with algae (Chlorella n inland water, Dunlaiella in sea water) are outlined. The enrichment factor for Chlorella was under favourable conditions around 6600, for Dunlaiella around 3000. Recovery of $^{237}$Pu from biological material and aqueous solutions is possible with about 90 % yield

Radiostrontiumanalytik 1: Abtrennung und Bestimmung von 89^{89}Sr und 90^{90}Sr aus Graphitproben und Leachlösungen, Arbeitsvorschriften

Die bisher in der Routine eingesetzten Abwandlungen der Probenvorbereitung und des Trennverfahrens für $^{89}$S r und $^{90}$Sr bei Gegenwart von Spalt- und Aktivierungsprodukten sowie die komplexometrische Ausbeutebestimmung werden ausführlich beschrieben