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Extraction of PCDD/PCDF from soil with supercritical CO2: Optimization by a three-level factorial design approach

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Abstract

Two factors (pressure and temperature) varied over three levels were optimized for the extraction of PCDD/F from native contaminated soil with toluene-modified supercritical carbon dioxide. Temperature had a strong positive effect on the recovery. The most efficient extraction was achieved at 120 °C. This is in contrast to the influence of the temperature on the extraction of HCH, where a higher recovery is obtained at 60 °C than at 150 °C. The optimized conditions found for this soil were applied to the analysis of a BCR (European Commission) reference material prepared from contaminated industrial soil. The results are in good agreement with those of an interlaboratory study.

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Authors and Affiliations

  1. Institut Fresenius, Labor Hamburg, Andreas-Meyer-Strasse 31–35, D-22113 Hamburg, Germany, Present address: European Commission, Joint Research Centre, Food Products and Consumer Goods Unit, I-21020 Ispra (VA), Italy, , , , , , DE

    C. von Holst

  2. Institut Fresenius, Labor Hamburg, Andreas-Meyer-Strasse 31–35, D-22113 Hamburg, Germany Universität-GH Siegen, Analytische Chemie I, Adolf-Reichwein-Strasse 2, D-57068 Siegen, Germany, Present address: Dionex GmbH, Am Wörtzgarten 10, D-65510 Ingelheim, Germany, , , , , , DE

    G. Maio

  3. Universität-GH Siegen, Analytische Chemie I, Adolf-Reichwein-Strasse 2, D-57068 Siegen, Germany, , , , , , DE

    B. W. Wenclawiak

  4. Institut Fresenius, Konrad-Adenauer-Strasse 30, D-55218 Ingelheim, Germany, Present address: Boehringer Ingelheim Pharma KG, A Analytik, D-55216 Ingelheim, Germany, , , , , , DE

    R. L. Darskus

Authors
  1. C. von Holst
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  2. G. Maio
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  3. B. W. Wenclawiak
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  4. R. L. Darskus
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Received: 4 January 2000 / Revised: 5 April 2000 / Accepted: 7 April 2000

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von Holst, C., Maio, G., Wenclawiak, B. et al. Extraction of PCDD/PCDF from soil with supercritical CO2: Optimization by a three-level factorial design approach. Fresenius J Anal Chem 368, 378–383 (2000). https://doi.org/10.1007/s002160000446

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  • DOI: https://doi.org/10.1007/s002160000446

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