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Solid phase extraction of polyhalogenated pollutants from freshwater using chemically modified multi‐walled carbon nanotubes and their determination by gas chromatography
Author(s) -
Abdel Salam Mohamed,
Burk Robert
Publication year - 2009
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200800593
Subject(s) - solid phase extraction , extraction (chemistry) , adsorption , carbon nanotube , chromatography , desorption , detection limit , gas chromatography , chemistry , aqueous solution , analyte , sample preparation , solid phase microextraction , polyethylene glycol , pentachlorophenol , materials science , environmental chemistry , nanotechnology , gas chromatography–mass spectrometry , mass spectrometry , organic chemistry
This paper describes the application of pristine and chemically modified multi‐walled carbon nanotubes (MWCNTs) as packing materials for the preconcentration and determination of various polyhalogenated organic pollutants, pentachlorophenol, 2,4,5‐trichlorophenol, 3,3′,4,4′‐tetrachlorobiphenyl, and 2,2′,5,5′‐tetrabromobiphenyl from real water samples based on solid‐phase extraction. MWCNTs were chemically modified by octadecyl amine and polyethylene glycol, separately, and the resulting nano materials were used as packing materials for solid phase extraction. Method development, applicability, and suitability of the above mentioned adsorbents for the solid phase extraction were studied. Method development showed great reproducibility and sensitivity, and low limits of detection within a considerable linear range. The regeneration and reusability of the SPE cartridges were studied using Rideau River (Ottawa, Canada) surface water samples and the results showed that cartridges could be used for three cycles of adsorption/desorption with no loss of efficiency. In general, the results suggested that modification of MWCNTs affords a novel class of adsorbents, which could be used for the SPE of various analytes from aqueous solutions with great efficiency, recovery, reproducibility, sensitivity, and precision, within a wide range of analyte concentrations.