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Passive extraction and clean-up of phenoxy acid herbicides in samples from a groundwater plume using hollow fiber supported liquid membranes

Liu, Jing-fu LU ; Toraeng, Lars; Mayer, Philipp and Jönsson, Jan Åke LU (2007) In Journal of Chromatography A 1160(1-2). p.56-63
Abstract
Hollow fiber supported liquid membranes were applied for the passive extraction of phenoxy acid herbicides from water samples. Polypropylene hollow fiber membranes (240 mu m i.d., 30 mu m wall thickness, 0.05 mu m pore size, 30 cm length) were impregnated with 2.0% tri-n-octylphosphine oxide (TOPO) in di-n-hexyl ether in the pores of the fiber wall to form a liquid membrane. They were then filled with basic solution in the lumen as acceptor and finally placed into the sample (donor). Complete extraction of phenoxy acid herbicides including 2,4-D, MCPA, dichlorprop, and mecoprop from an acidified sample (4 mL, adjusted to pH 1.5 with HCl) into basic acceptor (10 mu L of 0.2 M NaOH) was achieved after 4 h of shaking (100 rpm) resulting in an... (More)
Hollow fiber supported liquid membranes were applied for the passive extraction of phenoxy acid herbicides from water samples. Polypropylene hollow fiber membranes (240 mu m i.d., 30 mu m wall thickness, 0.05 mu m pore size, 30 cm length) were impregnated with 2.0% tri-n-octylphosphine oxide (TOPO) in di-n-hexyl ether in the pores of the fiber wall to form a liquid membrane. They were then filled with basic solution in the lumen as acceptor and finally placed into the sample (donor). Complete extraction of phenoxy acid herbicides including 2,4-D, MCPA, dichlorprop, and mecoprop from an acidified sample (4 mL, adjusted to pH 1.5 with HCl) into basic acceptor (10 mu L of 0.2 M NaOH) was achieved after 4 h of shaking (100 rpm) resulting in an enrichment factor of 400 times. The acceptor was then neutralized by addition of HCl and injected into a HPLC system for the determination of the phenoxy acid herbicides. Environmentally relevant salinity (0-3.5% NaCl) and dissolved organic matter (0-25 mg/L of dissolved organic carbon) had no significant effect on the extraction. The method provided extraction efficiencies of more than 91%, detection limits of 0.3-0.6 mu g/L, and combined extraction and clean up in one single step. This procedure was applied to deter-mine aqueous concentrations of phenoxy acid herbicides in groundwater samples collected from an old dumping site (Cheminova, Denmark) with detected concentrations up to 5800 mu g/L. Although the samples were very dirty with large amounts of suspended particles, non-aqueous phase liquids (NAPLs) and dissolved organic matters, good spike recoveries (80-126%) were obtained for 10 of the 11 samples. (c) 2007 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
passive sampling, acids, phenoxy, hollow fiber supported liquid membrane, Complete extraction, polluted groundwater
in
Journal of Chromatography A
volume
1160
issue
1-2
pages
56 - 63
publisher
Elsevier
external identifiers
  • wos:000248891400007
  • scopus:34447549110
ISSN
0021-9673
DOI
10.1016/j.chroma.2007.04.010
language
English
LU publication?
yes
id
e39b73d8-29d1-4dad-a8f2-eb5edb212def (old id 691802)
date added to LUP
2007-12-13 08:47:52
date last changed
2017-07-30 04:41:40
@article{e39b73d8-29d1-4dad-a8f2-eb5edb212def,
  abstract     = {Hollow fiber supported liquid membranes were applied for the passive extraction of phenoxy acid herbicides from water samples. Polypropylene hollow fiber membranes (240 mu m i.d., 30 mu m wall thickness, 0.05 mu m pore size, 30 cm length) were impregnated with 2.0% tri-n-octylphosphine oxide (TOPO) in di-n-hexyl ether in the pores of the fiber wall to form a liquid membrane. They were then filled with basic solution in the lumen as acceptor and finally placed into the sample (donor). Complete extraction of phenoxy acid herbicides including 2,4-D, MCPA, dichlorprop, and mecoprop from an acidified sample (4 mL, adjusted to pH 1.5 with HCl) into basic acceptor (10 mu L of 0.2 M NaOH) was achieved after 4 h of shaking (100 rpm) resulting in an enrichment factor of 400 times. The acceptor was then neutralized by addition of HCl and injected into a HPLC system for the determination of the phenoxy acid herbicides. Environmentally relevant salinity (0-3.5% NaCl) and dissolved organic matter (0-25 mg/L of dissolved organic carbon) had no significant effect on the extraction. The method provided extraction efficiencies of more than 91%, detection limits of 0.3-0.6 mu g/L, and combined extraction and clean up in one single step. This procedure was applied to deter-mine aqueous concentrations of phenoxy acid herbicides in groundwater samples collected from an old dumping site (Cheminova, Denmark) with detected concentrations up to 5800 mu g/L. Although the samples were very dirty with large amounts of suspended particles, non-aqueous phase liquids (NAPLs) and dissolved organic matters, good spike recoveries (80-126%) were obtained for 10 of the 11 samples. (c) 2007 Elsevier B.V. All rights reserved.},
  author       = {Liu, Jing-fu and Toraeng, Lars and Mayer, Philipp and Jönsson, Jan Åke},
  issn         = {0021-9673},
  keyword      = {passive sampling,acids,phenoxy,hollow fiber supported liquid membrane,Complete extraction,polluted groundwater},
  language     = {eng},
  number       = {1-2},
  pages        = {56--63},
  publisher    = {Elsevier},
  series       = {Journal of Chromatography A},
  title        = {Passive extraction and clean-up of phenoxy acid herbicides in samples from a groundwater plume using hollow fiber supported liquid membranes},
  url          = {http://dx.doi.org/10.1016/j.chroma.2007.04.010},
  volume       = {1160},
  year         = {2007},
}