Published:Journal of Chromatographic Science,
ISSN 0021-9665Volume
41, Number 2, February 2003, pp. 53-56
Analytical Procedure for the Determination of Chlorobenzenes
in Sediments
Lidia Wolska, Piotr Konieczka, Anna Jastrzebska, and Jacek
Namiesnik*
Department of Analytical Chemistry, Chemical Faculty, Gdansk University of
Technology, 80-952 Gdansk, Poland
This study presents the procedure for the determination of chlorobenzenes
in sediment. It consists of solvent extraction (shaking overnight), extract
clean-up with the use of a homemade glass column packed with activated silica
gel and freshly activated copper, and slow solvent evaporation to a volume
of 0.3 mL. Two-microliter extract portions are analyzed by means of gas chromatography
with an Rtx-624 capillary column (60 m x 0.32 mm, df = 1.8 µm) coupled
with mass spectrometry (in selected ion-monitoring mode). Deuterated 1,2-dibromobenzene
is used as the recovery standard. The recovery of this method for all chlorobenzenes
is high (ranging from 78% to 107%) with the exception of monochlorobenzene,
which is 58%. The method is also characterized by good precision, which is
commonly accepted in the analysis of trace organic pollution.
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