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@ARTICLE{Babay:51790,
author = {Babay, P. A. and Gettar, R. T. and Silva, M. F. and Thiele,
B. and Batistoni, D. A.},
title = {{S}eparation of nonylphenol ethoxylates and nonylphenol by
non-aqueous capillary electrophoresis},
journal = {Journal of chromatography / A},
volume = {1116},
issn = {0021-9673},
address = {New York, NY [u.a.]},
publisher = {Science Direct},
reportid = {PreJuSER-51790},
pages = {277 - 285},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {Capillary electrophoresis based on non-aqueous solvent
background electrolytes was employed, with single and
multiple wavelength UV detection, to evaluate discrimination
among oligomer components of mixtures of non-ionic, long
chain nonylphenol ethoxylates (NPnEO, with n = number of
ethoxy units) and their lipophilic degradation products. The
tested organic solvents included acetonitrile, methanol,
ethanol, 1- and 2-propanol, 1-butanol and tetrahydrofurane
in the presence of sodium acetate. A rational variation of
composition of background electrolyte solvent mixtures
allowed to modify the mobility of electroosmotic flow and
the type and degree of interactions between the ionic
additive (sodium acetate) and the components of the analyte
mixtures. The physicochemical properties of the solvents,
such as dielectric constant, viscosity and electron
donor-acceptor ability regarding the additive, were
considered to improve the resolution of lipophilic compounds
with less than three ethoxy groups and the discrimination
attainable for longer chain oligomers. The studied
methodologies also allowed discerning between surfactants of
similar (nominal) ethoxy chain lengths. This was
demonstrated by the different peak distribution patterns
observed for NPnEO compounds with n = 7.5 and 10,
respectively.},
keywords = {Electrophoresis, Capillary: methods / Ethylene Glycols:
isolation $\&$ purification / Phenols: isolation $\&$
purification / Spectrophotometry, Ultraviolet /
Surface-Active Agents: isolation $\&$ purification /
Viscosity / Ethylene Glycols (NLM Chemicals) / Phenols (NLM
Chemicals) / Surface-Active Agents (NLM Chemicals) /
nonylphenol (NLM Chemicals) / terics (NLM Chemicals) / J
(WoSType)},
cin = {ICG-III},
ddc = {540},
cid = {I:(DE-Juel1)VDB49},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Biochemical Research Methods / Chemistry, Analytical},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:16545826},
UT = {WOS:000237680300036},
doi = {10.1016/j.chroma.2006.03.004},
url = {https://juser.fz-juelich.de/record/51790},
}