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@ARTICLE{Chen:22836,
author = {Chen, L. and Hofmann, D. and Klumppp, E. and Xiang, X. and
Chen, Y. and Küppers, S.},
title = {{B}ottom-up approach for the reaction of xenobiotics and
their metabolites with model substances for natural organic
matter by electrochemistry-mass spectrometry ({EC}-{MS})},
journal = {Chemosphere},
volume = {89},
issn = {0045-6535},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PreJuSER-22836},
pages = {1376 - 1383},
year = {2012},
note = {Record converted from VDB: 12.11.2012},
abstract = {Risk assessment of xenobiotics requires a comprehensive
understanding of their transformation in the environment. As
most of the transformation processes usually involve a redox
reaction or a hydrolysis as the first steps of the
transformation, we applied an approach that uses an
electrochemical cell to investigate model "redox" reactions
in aqueous solutions for environmental processes. We
investigated the degradation of a variety of xenobiotics
from polar to nonpolar and analyzed their degradation
products by on-line coupling of electrochemistry with mass
spectrometry (EC-MS). Furthermore, we evaluated possible
binding reactions with regard to the generation of
non-extractable residues with some model substances
(catechol, phthalic acid, γ-l-Glutamyl-l-cysteinyl-glycine
(GSH) and l-histidine) deduced from a natural organic matter
(NOM) structure model and identified possible binding-sites.
Whereas typically investigations in soil/water-systems have
been applied, we used to our knowledge for the first time a
bottom-up approach, starting from the chemicals of interest
and different model substances for natural organic matter to
evaluate chemical binding mechanisms (or processes) in the
EC-MS under redox conditions. Under oxidative conditions,
bindings of the xenobiotics with catechol, GSH and histidine
were found, but no reactions with the model compound
phthalic acid were observed. In general, no chemical binding
has yet been found under reductive conditions. In some cases
(i.e. benzo[a]anthracene) the oxidation product only
underwent a binding reaction, whereas the xenobiotic itself
did not undergo any reactions. EC-MS is a promising fast and
simple screening method to investigate the environmental
behavior of xenobiotics and to evaluate the potential risks
of newly synthesized substances.},
cin = {ZCH / IBG-3},
ddc = {333.7},
cid = {I:(DE-Juel1)ZCH-20090406 / I:(DE-Juel1)IBG-3-20101118},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:22819944},
UT = {WOS:000310112600016},
doi = {10.1016/j.chemosphere.2012.05.105},
url = {https://juser.fz-juelich.de/record/22836},
}