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  1. 1 Open Chemistry

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  1. 1 2009

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  1. 1 Janků J.

  2. 1 Kubal M.

  3. 1 Zdravkov B.

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Comparison of perchloroethylene extraction techniques in soil gas survey quantification

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Zdravkov B., Kubal M., Janků J.
Open Chemistry
|
2009
|
vol. 7
|
issue 3
274-280
EN
Subsurface pollution by volatile organic compounds has emerged as a widespread problem in industrialized countries. This study compares static headspace technique and methanol extraction/purge-and-trap analysis followed by thermal desorption/gas chromatography in attempts for quantification of gas survey results in the determination of these chemicals in soil. Several soils were contaminated with aqueous solution of perchloroethylene (PCE) (140 mg L−1) using a vapor treatment method. Soil spiking took place up to 24 h in desiccator by exposing individual soil samples contained in open 40 mL glass vials to PCE evaporated from the solution. After exposure the samples were stored and analyzed within 2 days. The achieved results strongly suggest that gas extraction can provide quantitative results, regarding PCE concentration in soils, which are not significantly different from liquid based extraction analysis. [...]
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