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Electrospun Nanofibers Sorbents for Pre-Concentration of 1,1-dichloro-2,2 bis-(4-chlorophenyl)ethylene with Subsequent Desorption by Pressurized Hot Water Extraction

Adeyemi, David; Mokgadi, Janes; Darkwa, James; Anyakora, Chimezie; Ukpo, Grace; Turner, Charlotta LU and Torto, Nelson (2011) In Chromatographia 73(9-10). p.1015-1020
Abstract
Electrospun polystyrene (PS) nanofibers (130-500 nm) incorporating a potassium salt of imidazole-1-carbodithioate were evaluated as potential sorbents for the pre-concentration of a model organochlorine pesticide; 1,1-dichloro-2,2bis-(4-chlorophenyl)ethylene (DDE). The efficiencies of DDE (0.25-1.0 mu g L-1) adsorption by the nanofiber sorbent followed by desorption employing pressurized hot water extraction (PHWE) were investigated and monitored using gas chromatography with electron capture detection (GC-ECD). Parameters such as time, temperature and pressure of extraction, sample volume, DDE concentration and sorbent mass were optimized. The maximum adsorption of DDE (0.50 mu g L-1) on electrospun PS and carbodithioate incorporated PS... (More)
Electrospun polystyrene (PS) nanofibers (130-500 nm) incorporating a potassium salt of imidazole-1-carbodithioate were evaluated as potential sorbents for the pre-concentration of a model organochlorine pesticide; 1,1-dichloro-2,2bis-(4-chlorophenyl)ethylene (DDE). The efficiencies of DDE (0.25-1.0 mu g L-1) adsorption by the nanofiber sorbent followed by desorption employing pressurized hot water extraction (PHWE) were investigated and monitored using gas chromatography with electron capture detection (GC-ECD). Parameters such as time, temperature and pressure of extraction, sample volume, DDE concentration and sorbent mass were optimized. The maximum adsorption of DDE (0.50 mu g L-1) on electrospun PS and carbodithioate incorporated PS nanofibers was at 43.7 and 94.6%, respectively, in 20 min. Incorporation of carbodithiote doubled the adsorption efficiency of PS and achieved LOD of 0.000234 mu g L-1 for DDE. The optimal DDE desorption on the PHWE system was 93.8% in 10 min. It would seem that the use of electrospun nanofibers as sorbent material with subsequent desorption by PHWE has great potential and thus warrants further investigations. This approach as it uses water as an extraction solvent for an organochlorine pesticide provides an opportunity to eliminate organic solvents, especially for procedures aimed at monitoring organic pollutants in the environment. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Electrospun nanofibers, Sorbents, Pre-concentration, Organochlorine, pesticides
in
Chromatographia
volume
73
issue
9-10
pages
1015 - 1020
publisher
Vieweg Verlag
external identifiers
  • wos:000289300500023
  • scopus:79958261176
ISSN
0009-5893
DOI
10.1007/s10337-011-1989-3
language
English
LU publication?
yes
id
0d81a48d-ed4a-4e20-bc91-5c9574fe6ea5 (old id 1965904)
date added to LUP
2011-05-20 12:28:30
date last changed
2017-11-05 04:00:49
@article{0d81a48d-ed4a-4e20-bc91-5c9574fe6ea5,
  abstract     = {Electrospun polystyrene (PS) nanofibers (130-500 nm) incorporating a potassium salt of imidazole-1-carbodithioate were evaluated as potential sorbents for the pre-concentration of a model organochlorine pesticide; 1,1-dichloro-2,2bis-(4-chlorophenyl)ethylene (DDE). The efficiencies of DDE (0.25-1.0 mu g L-1) adsorption by the nanofiber sorbent followed by desorption employing pressurized hot water extraction (PHWE) were investigated and monitored using gas chromatography with electron capture detection (GC-ECD). Parameters such as time, temperature and pressure of extraction, sample volume, DDE concentration and sorbent mass were optimized. The maximum adsorption of DDE (0.50 mu g L-1) on electrospun PS and carbodithioate incorporated PS nanofibers was at 43.7 and 94.6%, respectively, in 20 min. Incorporation of carbodithiote doubled the adsorption efficiency of PS and achieved LOD of 0.000234 mu g L-1 for DDE. The optimal DDE desorption on the PHWE system was 93.8% in 10 min. It would seem that the use of electrospun nanofibers as sorbent material with subsequent desorption by PHWE has great potential and thus warrants further investigations. This approach as it uses water as an extraction solvent for an organochlorine pesticide provides an opportunity to eliminate organic solvents, especially for procedures aimed at monitoring organic pollutants in the environment.},
  author       = {Adeyemi, David and Mokgadi, Janes and Darkwa, James and Anyakora, Chimezie and Ukpo, Grace and Turner, Charlotta and Torto, Nelson},
  issn         = {0009-5893},
  keyword      = {Electrospun nanofibers,Sorbents,Pre-concentration,Organochlorine,pesticides},
  language     = {eng},
  number       = {9-10},
  pages        = {1015--1020},
  publisher    = {Vieweg Verlag},
  series       = {Chromatographia},
  title        = {Electrospun Nanofibers Sorbents for Pre-Concentration of 1,1-dichloro-2,2 bis-(4-chlorophenyl)ethylene with Subsequent Desorption by Pressurized Hot Water Extraction},
  url          = {http://dx.doi.org/10.1007/s10337-011-1989-3},
  volume       = {73},
  year         = {2011},
}