Uranium Oxide Clusters by Laser Desorption Ionisation During MALDI-TOF MS Analysis of Uranium(VI)

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Authors	SOTO-GUERRERO Julio Arturo GAJDOŠOVÁ Dagmar HAVEL Josef
Year of publication	2001
Type	Article in Periodical
Magazine / Source	Journal of Radioanalytical and Nuclear Chemistry
MU Faculty or unit	Faculty of Science
Citation
Field	Analytic chemistry
Description	Laser desorption ionization (LDI) mode of matrix-assisted laser desorption ionizaiton time-of-flight mass spectrometry (MALDI-TOFMS) analysis of uranium(VI) leads to the formation of uranium oxides clusters, as with fast atom bombardment (FAB). Different uranium clusters than those with FAB were observed. Three defferent families of formula (UO2)xOy+, and two of formula (UO2)xOy2+ were found. While x increases, the O:U ratio tends to 3. The relationship between neighboring clusters can be described as (UO2)xOy+=(UO2)x-1Oy-1+UO3. The formation of clusters can be eliminated using some matrices, and a more sensitive uranium determination with a detection limit dowm to 10-12M is possible.
Related projects:	Structure and character of bonding, properties and analysis of synthetic and natural molecular ensembles