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Membrane protected conductive polymer as micro-SPE device for the determination of triazine herbicides in aquatic media

Bagheri, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1002/jssc.200900553
  3. Abstract:
  4. A micro-SPE technique was developed by fabricating a rather small package including a polypropylene membrane shield containing the appropriate sorbent. The package was used for the extraction of some triazine herbicides from aqueous samples. Solvent desorption was subsequently performed in a microvial and an aliquot of extractant was injected into GC-MS. Various sorbents including aniline-ortho-phenylene diamine copolymer, newly synthesized, polypyrrole, multiwall carbon nanotube, C18 and charcoal were examined as extracting media. Among them, conductive polymers exhibited better performance. Influential parameters including extraction and desorption time, desorption solvent and the ionic strength were optimized. The developed method proved to be rather convenient and offers sufficient sensitivity and good reproducibility. The detection limits of the method under optimized conditions were in the range of 0.01-0.04 ng/mL. The RSDs at a concentration level of 0.1 ng/mL were obtained between 4.5 and 9.3% (n = 5). The calibration curves of analytes showed linearity in the range of 0.05-10 ng/mL. The developed method was successfully applied to the extraction of selected triazines from real water samples. The whole procedure showed to be conveniently applicable and quite easy to manipulate
  5. Keywords:
  6. Conductive polymers ; GC-MS ; Micro-SPE ; Triazine herbicides ; Analytes ; Aquatic media ; Aqueous samples ; Calibration curves ; Concentration levels ; Conductive polymer ; Desorption time ; Detection limits ; Environmental analysis ; Extractants ; Multi-wall carbon nanotubes ; Optimized conditions ; Phenylenediamines ; Polypropylene membrane ; Reproducibilities ; Small package ; Solvent desorption ; Water samples ; Carbon nanotubes ; Conductive plastics ; Desorption ; Ionic strength ; Ionization of liquids ; Multiwalled carbon nanotubes (MWCN) ; Polymer ; Polypyrroles ; Solar radiation ; Weed control ; Aniline derivative ; Multi walled nanotube ; Polypyrrole ; Triazine ; Article ; Mass fragmentography ; Membrane component ; pH measurement ; Priority journal ; Solid phase extraction ; Adsorption ; Aniline Compounds ; Charcoal ; Gas chromatography-mass spectrometry ; Herbicides ; Membranes, artificial ; Nanotubes, carbon ; Polypropylenes ; Pyrroles ; Solid phase microextraction ; Triazines ; Water ; Water pollutants, chemical
  7. Source: Journal of Separation Science ; Volume 33, Issue 8 , 2010 , Pages 1132-1138 ; 16159306 (ISSN)
  8. URL: http://onlinelibrary.wiley.com/doi/10.1002/jssc.200900553/abstract;jsessionid=7412DE0EFF0374DA9E3F3496F42AF882.f04t03