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@ARTICLE{Klauth:62967,
author = {Klauth, P. and Joschko, A. and Ustohal, P. and Büddefeld,
J. and Klumpp, E. and Vereecken, H. and Lezhnina, M. and
Kynast, U.},
title = {{L}ight fiber optic probe for measuring internal
breakthrough of rare earth ion-labelled microspheres in
porous media under unsaturated conditions},
journal = {Colloids and surfaces / A},
volume = {325},
issn = {0927-7757},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PreJuSER-62967},
pages = {173 - 179},
year = {2008},
note = {Record converted from VDB: 12.11.2012},
abstract = {Application of minimally invasive probes for measuring
fluorescent labelled colloids inside sand columns resulted
in internal breakthrough curves at given points, that
provided information about mass distributions without
disrupting the column. Until now, light fiber optic probes
were used in combination with organic fluorophores like
fluoresceine or rhodamine, which have inherent disadvantage,
such as comparably small Stoke's shifts and quenching at
high concentrations. These may be overcome using rare earth
ion complexes to label colloidal particles like microspheres
(MS). Furthermore, these dyes have large fluorescent
lifetimes compared to organic fluorophores, which readily
allows the elimination of background fluorescence using
time-resolved spectroscopy. We demonstrate the novel
application of rare earth ionlabelled microspheres as
colloidal tracers in column experiments under unsaturated
conditions in porous media in coupling with a detection
setup based on internal light fiber optic probes.
Differences in mass budgets between internal detection and
detection at the outlet were confirmed afterwards by
invasive refurbishment of the column matrix. (c) 2008
Elsevier B.V. All rights reserved.},
keywords = {J (WoSType)},
cin = {ICG-4 / JARA-ENERGY / JARA-SIM},
ddc = {540},
cid = {I:(DE-Juel1)VDB793 / $I:(DE-82)080011_20140620$ /
I:(DE-Juel1)VDB1045},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Chemistry, Physical},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000258990200010},
doi = {10.1016/j.colsurfa.2008.05.012},
url = {https://juser.fz-juelich.de/record/62967},
}