Dynamic light-scattering measurement comparability of nanomaterial suspensions

Autor(en)

Carmen Nickel, Judith Angelstorf, Ralf Bienert, Corinna Burkart, Stephan Gabsch, Sabrina Giebner, Andrea Haase, Bryan Hellack, Henner Hollert, Kerstin Hund-Rinke, Dirk Jungmann, Heinz Kaminski, Andreas Luch, Hanna M. Maes, Andre Nogowski, Matthias Oetken, Andreas Schaeffer, Andreas Schiwy, Karsten Schlich, Michael Stintz, Frank von der Kammer, Thomas A. J. Kuhlbusch

Abstrakt

Increased use of nanomaterials in everyday
products leads to their environmental release and
therefore, the information need on their fate and
behaviour. Nanomaterials have to be suspended with
high repeatability and comparability for studies on
environmental effects. They also have to be well
characterised with a focus on the state of agglomeration
and particle size distribution. Dynamic lightscattering
(DLS) is a common technique used for these
measurements. If suspensions are prepared in different
laboratories, then concern has risen about the
comparability of the measured results, especially
when different DLS instruments are used. Therefore,
for quality assurance, a round-robin test was conducted
to assess the comparability of different DLS
instruments and a dispersion protocol in ten independent
laboratories. Polystyrene and TiO2 were chosen
as test (nano)materials. For the comparability of the
DLS instruments, the average sizes of the PSL and a
stabilised TiO2 suspension were measured. The measured
average hydrodynamic diameter shows an
overall good inter-laboratory comparability. For the PSL suspension, an average hydrodynamic diameter
of 201 ± 13 nm and for the TiO2 suspension an
average diameter of 224 ± 24 nm were detected. For
the TiO2 suspension that was prepared at each
laboratory following an established suspension preparation
protocol, an average hydrodynamic diameter
of 211 ± 11 nm was detected. The measured average
particle size (mode) increased up to 284 nm with a
high standard deviation of 119 nm if the preparation
protocol could not established and different procedures
or different equipment were employed. This
study shows that no significant differences between
the employed DLS instrument types were determined.
It was also shown that comparable measurements and
suspension preparation could be achieved if welldefined
suspension preparation protocols and comparable
equipment can be used.

Organisation(en)

Externe Organisation(en)

Universität Hamburg, Technische Universität Dresden, Rheinisch-Westfälische Technische Hochschule Aachen, Institut für Energie- und Umwelttechnik e. V. (IUTA), Bundesanstalt für Materialforschung und -prüfung (BAM), Johann Wolfgang Goethe-Universität Frankfurt am Main, Bundesinstitut für Risikobewertung, Fraunhofer-Institut für Molekularbiologie und Angewandte Oekologie IME, Universität Duisburg-Essen

Journal

Journal of Nanoparticle Research: an interdisciplinary forum for nanoscale science and technology

Band

16

Anzahl der Seiten

12

ISSN

1388-0764

DOI

https://doi.org/10.1007/s11051-014-2260-2

Publikationsdatum

01-2014

Peer-reviewed

Ja

ÖFOS 2012

104023 Umweltchemie, 104002 Analytische Chemie, 105904 Umweltforschung, 210006 Nanotechnologie

Schlagwörter

ASJC Scopus Sachgebiete

Condensed Matter Physics, Bioengineering, Atomic and Molecular Physics, and Optics, Allgemeine Chemie, Allgemeine Materialwissenschaften, Modelling and Simulation

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/cd649c12-0f7b-4aac-b65a-8d9679f5569f