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Extracting syringe for extraction of phthalate esters in aqueous environmental samples

Bergström, Staffan LU ; Barri, Thaer LU ; Norberg, Jan; Jönsson, Jan Åke LU and Mathiasson, Lennart LU (2007) In Analytica Chimica Acta 594(2). p.240-247
Abstract
The use of the extracting syringe (ESy), a fully automated membrane-based extraction technique, for analysis of phthalate esters in complex aqueous samples has been investigated. The ESy, working as an autosampler that combines the extraction process and injection into the gas chromatograph (GC) in one single step, is placed on top of the GC equipped with a flame ionisation detector. The aqueous samples are loaded in a tray and automatically extracted by employing microporous membrane liquid-liquid extraction principle. After the extraction, the extract is directly injected into the GC's programmable temperature vaporisation injector. Six different phthalate esters were used as model compounds. Four extraction solvents were tested and the... (More)
The use of the extracting syringe (ESy), a fully automated membrane-based extraction technique, for analysis of phthalate esters in complex aqueous samples has been investigated. The ESy, working as an autosampler that combines the extraction process and injection into the gas chromatograph (GC) in one single step, is placed on top of the GC equipped with a flame ionisation detector. The aqueous samples are loaded in a tray and automatically extracted by employing microporous membrane liquid-liquid extraction principle. After the extraction, the extract is directly injected into the GC's programmable temperature vaporisation injector. Six different phthalate esters were used as model compounds. Four extraction solvents were tested and the addition of sample organic modifier was examined. Toluene was the optimal solvent to use for extraction. Due to the large variation in polarity of phthalate esters, 50% methanol as organic modifier had to be added to the samples so as to extract the most nonpolar phthalate esters; di-2-ethylhexylphthalate and di-n-octylphthalate, whereas the other four relatively polar phthalate esters were extracted from unmodified samples. No significant difference between extraction of river water, leachate water from a landfill and reagent water was noted, except for minor deviations. The extraction time was 20 min for extraction of a 1-mL sample, resulting in a good linearity for all aqueous media investigated, good enrichment factors (54-110 folds) and low LOD values (0.2-10 ng mL(-1)) and relative standard deviation (%R.S.D.; 0.9-3.7%). (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
leachate water, environmental analysis, membrane extraction, extracting syringe, microporous membrane, phthalate esters, liquid-liquid extraction, gas chromatography
in
Analytica Chimica Acta
volume
594
issue
2
pages
240 - 247
publisher
Elsevier
external identifiers
  • wos:000248111100013
  • scopus:34250633223
ISSN
1873-4324
DOI
10.1016/j.aca.2007.05.015
language
English
LU publication?
yes
id
0fe6cf7a-1a17-43cb-80a0-6d9df5d92075 (old id 646013)
date added to LUP
2007-12-05 15:04:23
date last changed
2017-01-01 07:02:50
@article{0fe6cf7a-1a17-43cb-80a0-6d9df5d92075,
  abstract     = {The use of the extracting syringe (ESy), a fully automated membrane-based extraction technique, for analysis of phthalate esters in complex aqueous samples has been investigated. The ESy, working as an autosampler that combines the extraction process and injection into the gas chromatograph (GC) in one single step, is placed on top of the GC equipped with a flame ionisation detector. The aqueous samples are loaded in a tray and automatically extracted by employing microporous membrane liquid-liquid extraction principle. After the extraction, the extract is directly injected into the GC's programmable temperature vaporisation injector. Six different phthalate esters were used as model compounds. Four extraction solvents were tested and the addition of sample organic modifier was examined. Toluene was the optimal solvent to use for extraction. Due to the large variation in polarity of phthalate esters, 50% methanol as organic modifier had to be added to the samples so as to extract the most nonpolar phthalate esters; di-2-ethylhexylphthalate and di-n-octylphthalate, whereas the other four relatively polar phthalate esters were extracted from unmodified samples. No significant difference between extraction of river water, leachate water from a landfill and reagent water was noted, except for minor deviations. The extraction time was 20 min for extraction of a 1-mL sample, resulting in a good linearity for all aqueous media investigated, good enrichment factors (54-110 folds) and low LOD values (0.2-10 ng mL(-1)) and relative standard deviation (%R.S.D.; 0.9-3.7%).},
  author       = {Bergström, Staffan and Barri, Thaer and Norberg, Jan and Jönsson, Jan Åke and Mathiasson, Lennart},
  issn         = {1873-4324},
  keyword      = {leachate water,environmental analysis,membrane extraction,extracting syringe,microporous membrane,phthalate esters,liquid-liquid extraction,gas chromatography},
  language     = {eng},
  number       = {2},
  pages        = {240--247},
  publisher    = {Elsevier},
  series       = {Analytica Chimica Acta},
  title        = {Extracting syringe for extraction of phthalate esters in aqueous environmental samples},
  url          = {http://dx.doi.org/10.1016/j.aca.2007.05.015},
  volume       = {594},
  year         = {2007},
}