Stability of Th(IV) polymers measured by electrospray mass spectrometry and laser-induced breakdown detection

authored by: Clemens Walther, Markus Fuss, Sebastian Büchner, Horst Geckeis
Abstract: The formation of polynuclear thorium hydroxide complexes in acidic aqueous solutions is observed by electrospray mass spectrometry. Size, number of hydroxide ligands and charge of all complexes in solution are identified independently. By repeated measurements over a time span of up to 418 days the stability of the polymers is observed. At concentrations above [Th(IV)] _tot = 10 mM pentamers and dimers are the dominant stable species. In contrast, the fractions of pentamers initially present at [Th(IV)]_tot = 0.2 mM decrease within less than 4 weeks, correlated with the formation of nm-sized colloids observed by LIBD indicating an Ostwald-ripening like process.
External Organisation(s): Karlsruhe Institute of Technology (KIT)
Type: Article
Journal: Journal of Radioanalytical and Nuclear Chemistry
Volume: 282
Pages: 1003-1008
No. of pages: 6
ISSN: 0236-5731
Publication date: 16.07.2009
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Analytical Chemistry, Nuclear Energy and Engineering, Radiology Nuclear Medicine and imaging, Pollution, Spectroscopy, Public Health, Environmental and Occupational Health, Health, Toxicology and Mutagenesis
Sustainable Development Goals: SDG 3 - Good Health and Well-being
Electronic version(s): https://doi.org/10.1007/s10967-009-0158-8 (Access: Unknown)

BibTeX

@article{1b5fee353fbd4177b71131c57a514895,
title = "Stability of Th(IV) polymers measured by electrospray mass spectrometry and laser-induced breakdown detection",
abstract = "The formation of polynuclear thorium hydroxide complexes in acidic aqueous solutions is observed by electrospray mass spectrometry. Size, number of hydroxide ligands and charge of all complexes in solution are identified independently. By repeated measurements over a time span of up to 418 days the stability of the polymers is observed. At concentrations above [Th(IV)] tot = 10 mM pentamers and dimers are the dominant stable species. In contrast, the fractions of pentamers initially present at [Th(IV)]tot = 0.2 mM decrease within less than 4 weeks, correlated with the formation of nm-sized colloids observed by LIBD indicating an Ostwald-ripening like process.",
keywords = "Colloid, Electrospray, Laser-induced breakdown detection, Polymerization, Thorium",
author = "Clemens Walther and Markus Fuss and Sebastian B{\"u}chner and Horst Geckeis",
note = "Funding information: Acknowledgments We thank Marcus Altmaier (INE) for preparation of the stock solution and, together with Volker Neck, for many fruitful discussions. We also thank Oliver Schwindt for LIBD and the INE analytics group for ICP MS measurements. Finally, we acknowledge financial support by the {\textquoteleft}{\textquoteleft}Programm Nuklear{\textquoteright}{\textquoteright} and by the {\textquoteleft}{\textquoteleft}Helmholtz Russia Joint Research Group{\textquoteright}{\textquoteright} of the Helmholtz Gemeinschaft Deutscher Forschungszentren (HGF).",
year = "2009",
month = jul,
day = "16",
doi = "10.1007/s10967-009-0158-8",
language = "English",
volume = "282",
pages = "1003--1008",
journal = "Journal of Radioanalytical and Nuclear Chemistry",
issn = "0236-5731",
publisher = "Springer Netherlands",
number = "3",
}