IMIS

A new integrated search interface will become available in the next phase of marineinfo.org.
For the time being, please use IMIS to search available data

 

[ report an error in this record ]basket (0): add | show Print this page
Simultaneous determination of C1 and C2-halocarbons and monocyclic aromatic hydrocarbons in marine water samples at NG/L concentration levels
Dewulf, J.; Van Langenhove, H. (1995). Simultaneous determination of C1 and C2-halocarbons and monocyclic aromatic hydrocarbons in marine water samples at NG/L concentration levels. Int. J. Environ. Anal. Chem. 61(1): 35-46. http://dx.doi.org/10.1080/03067319508026235
In: International journal of environmental and analytical chemistry. Taylor & Francis: Amsterdam. ISSN 0306-7319; e-ISSN 1029-0397, more
Peer reviewed article  
Available in  Authors 
Author keywords
    Volatile organic compounds (VOCs), C1- and C,-organochlorines, monocyclic aromatic hydrocarbons, purge and trap, marine pollution
Authors  Top 
  • Dewulf, J., more
  • Van Langenhove, H., more
Abstract
    A Purge & Trap technique for the analysis of volatile organic compounds (VOCs) combined with GC-MS was applied to measure simultaneously concentrations of 13 C-1 and C2-chlorinated hydrocarbons (CHCs) and monocyclic aromatic hydrocarbons (MAHs) down to the I ng/l level. It proved to be impossible to reach this level working with an automated online apparatus because of two reasons. First, the low reproducibility was caused by the water vapour present in the gas stream after purging samples. The second reason was the presence of unpredictable contamination. An off-line purge system, however, combined with thermal dcsorption by means of the on-line apparatus gave reproducible measurements (standard deviations from 2.6 to 15.7%). Contamination was lower than 0.76 ng/l for all VOCs except for benzene, toluene and chloroform. The signal/noise ratio of three corresponded to concentrations below 0.63 ng/l for all VOCs. In this way limits of detection (LODs) of 0.48 (tetrachloroethylene) to 1.25 ng/l (o-xylene) were obtained, except for chloroform benzene and toluene. Their LODs were 4.93, 4.79 and 2.68 ng/l because of the contamination. Precision and accuracy were determined. The long term reliability of the method was evaluated using analytical quality control charts. In addition, sample treatment and storage were checked by adding deuterated surrogates. Results of analysis of water samples taken in the North Sea region and the Scheldt estuary illustrate the applicability of the method. Target compounds were detected in concentrations from 0.5 to 100 ng/l.
All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors