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Erschienen in: Journal of Nanoparticle Research 6/2015

01.06.2015 | Research Paper

Strategies for radiolabeling of commercial TiO2 nanopowder as a tool for sensitive nanoparticle detection in complex matrices

verfasst von: Heike Hildebrand, Stefan Schymura, Uwe Holzwarth, Neil Gibson, Matteo Dalmiglio, Karsten Franke

Erschienen in: Journal of Nanoparticle Research | Ausgabe 6/2015

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Abstract

Detection and quantification of engineered nanoparticles (NPs) in complex environmental or biological media is a major challenge since NP concentrations are generally expected to be low compared to elemental background levels. This study presents three different options for radiolabeling of commercial titania NP (TiO2-NP, AEROXIDE® P25, Evonik Industries, mean diameter 21 nm) for particle detection, localization, and tracing under various experimental conditions. The radiolabeling procedures ensure stability and consistency of important particle properties such as size and morphology. With the presented radiolabeling methods, detection (and quantification) limits for TiO2-NPs in concentrations as low as 0.5 ng/L can be realized in complex systems without the necessity of intense sample purification or pretreatment.

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Fußnoten
1
In many cell uptake studies exposure times range from several hours to many days or even weeks (Gibson et al. 2011; Marmorato et al. 2011; Simonelli et al. 2011). In such cases the use of short-lived radionuclides that are frequently applied also in medical imaging are of limited use. They can fruitfully only be applied to very fast transport or metabolic mechanisms.
 
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Metadaten
Titel
Strategies for radiolabeling of commercial TiO2 nanopowder as a tool for sensitive nanoparticle detection in complex matrices
verfasst von
Heike Hildebrand
Stefan Schymura
Uwe Holzwarth
Neil Gibson
Matteo Dalmiglio
Karsten Franke
Publikationsdatum
01.06.2015
Verlag
Springer Netherlands
Erschienen in
Journal of Nanoparticle Research / Ausgabe 6/2015
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI
https://doi.org/10.1007/s11051-015-3080-8

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