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Intercomparison exercise on the analysis of individual chlorobiphenyl congeners in marine media - first step: optimization of gas chromatographic conditions
de Boer, J.; Duinker, J.C.; Calder, J.; van de Meer, J. (1990). Intercomparison exercise on the analysis of individual chlorobiphenyl congeners in marine media - first step: optimization of gas chromatographic conditions. CM Documents - ICES, C.M. 1990(E:10). International Council for the Exploration of the Sea: Copenhagen. 10 + tables + figures pp.
Part of: ICES CM Documents - ICES. ICES: Copenhagen. ISSN 1015-4744

Available in  Authors 

Keywords
    Comparative studies
    Methodology
    Organizations > Research institutions
    Standardization > Calibration > Intercalibration
    Marine/Coastal

Authors  Top 
  • de Boer, J.
  • Duinker, J.C.
  • Calder, J.
  • van de Meer, J.

Abstract
    In this report the results of the first step of the ICES/IOC/ISPARCOM intercomparison exercise on the analysis of chlorobiphenyl congeners in marine media are summarized. Results were received from 62 laboratories. An encouraging agreement is achieved. This optimization of the GC conditions has led to a better level of agreement in comparison with former intercomparison exercises on CB analysis. Difficulties were experienced with the identification of the linear range of the electron capture detector and bringing the unknown solution within this linear range. Results based on peak heights showed a better reproducibility than results based on peak areas. The separation of the CBs 28 and 31 was the most difficult one. Only 28 laboratories were able to achieve a separation for these two CBs.

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