Published:Journal of Chromatographic Science,
ISSN 0021-9665 Volume 45,
Number 5, May/June 2007, pp.276-280
Separation and Characterization of Particles in
Natural Water and Soil Using Flow Field-Flow Fractionation
Chul Hun Eum[1], Dong Young Kang[2], Sang Yeon
Kim[1], and Seungho Lee[2],
[1]Korea Institute of Geoscience and Mineral Resources, Daejeon
305-350, Korea and
[2]Department of Chemistry, Hannam University, Daejeon 306-791,
Korea
Flow field-flow fractionation (FlFFF) is used to
characterize particles in natural water (ground and surface water)
and soil. The opposed flow sample concentration (OFSC) mode of
FlFFF (OFSC-FlFFF) is employed, where the colloidal sample is
continuously fed into the channel so that the particles are focused
into a narrow band near the inlet of the FlFFF channel before
the separation is initiated. There is no need for stopping the
flow for the sample relaxation, which is usually required in conventional
FlFFF operations. First, the OFSC-FlFFF is tested with mixtures
of polystyrene latex spheres. Then the OFSC-FlFFF procedure is
optimized for the analysis of particles in natural water and soil
by varying various experimental parameters including the flow
rates. Ground water of up to 100 mL has been successfully loaded,
concentrated, and characterized by OFSC-FlFFF. Results show that
the OFSC-FlFFF provides a simplified alternative to existing off-line
concentration procedures, and it shows high potential for application
to analysis of dilute colloidal particles in environmental water.
The composition of the samples was analyzed using atomic absorption
spectrometry.
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