Determining the chemical activity of hydrophobic organic compounds in soil using polymer coated vials
(2008) In Chemistry Central Journal 2.- Abstract
- Background: In soils contaminated by hydrophobic organic compounds, the concentrations are less indicative of potential exposure and distribution than are the associated chemical activities, fugacities and freely dissolved concentrations. The latter can be measured by diffusive sampling into thin layers of polymer, as in, for example, solid phase micro-extraction. Such measurements require equilibrium partitioning of analytes into the polymer while ensuring that the sample is not depleted. We introduce the validation of these requirements based on parallel sampling into polymer layers of different thicknesses. Results: Equilibrium sampling devices were made by coating glass vials internally with 3-12 mu m thick layers of... (More)
- Background: In soils contaminated by hydrophobic organic compounds, the concentrations are less indicative of potential exposure and distribution than are the associated chemical activities, fugacities and freely dissolved concentrations. The latter can be measured by diffusive sampling into thin layers of polymer, as in, for example, solid phase micro-extraction. Such measurements require equilibrium partitioning of analytes into the polymer while ensuring that the sample is not depleted. We introduce the validation of these requirements based on parallel sampling into polymer layers of different thicknesses. Results: Equilibrium sampling devices were made by coating glass vials internally with 3-12 mu m thick layers of polydimethylsiloxane (PDMS). These were filled with slurries of a polluted soil and gently agitated for 5 days. The concentrations of 7 polycyclic aromatic hydrocarbons (PAHs) in the PDMS were measured. Validation confirmed fulfilment of the equilibrium sampling requirements and high measurement precision. Finally, chemical activities of the PAHs in the soil were determined from their concentrations and activity coefficients in the PDMS. Conclusion: PAHs' thermodynamic activities in a soil test material were determined via a method of uptake into PDMS. This can be used to assess chemical exposure and predict diffusion and partitioning processes. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1247019
- author
- Reichenberg, Fredrik LU ; Smedes, Foppe ; Jönsson, Jan Åke LU and Mayer, Philipp
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Chemistry Central Journal
- volume
- 2
- publisher
- Chemistry Central
- external identifiers
-
- wos:000259066300001
- scopus:44649169700
- pmid:18460193
- ISSN
- 1752-153X
- DOI
- 10.1186/1752-153X-2-8
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Analytical Chemistry (S/LTH) (011001004)
- id
- 9c5e7ceb-e5b5-499c-99ec-16e933570ae3 (old id 1247019)
- date added to LUP
- 2016-04-01 13:25:15
- date last changed
- 2025-03-13 15:14:13
@article{9c5e7ceb-e5b5-499c-99ec-16e933570ae3,
abstract = {{Background: In soils contaminated by hydrophobic organic compounds, the concentrations are less indicative of potential exposure and distribution than are the associated chemical activities, fugacities and freely dissolved concentrations. The latter can be measured by diffusive sampling into thin layers of polymer, as in, for example, solid phase micro-extraction. Such measurements require equilibrium partitioning of analytes into the polymer while ensuring that the sample is not depleted. We introduce the validation of these requirements based on parallel sampling into polymer layers of different thicknesses. Results: Equilibrium sampling devices were made by coating glass vials internally with 3-12 mu m thick layers of polydimethylsiloxane (PDMS). These were filled with slurries of a polluted soil and gently agitated for 5 days. The concentrations of 7 polycyclic aromatic hydrocarbons (PAHs) in the PDMS were measured. Validation confirmed fulfilment of the equilibrium sampling requirements and high measurement precision. Finally, chemical activities of the PAHs in the soil were determined from their concentrations and activity coefficients in the PDMS. Conclusion: PAHs' thermodynamic activities in a soil test material were determined via a method of uptake into PDMS. This can be used to assess chemical exposure and predict diffusion and partitioning processes.}},
author = {{Reichenberg, Fredrik and Smedes, Foppe and Jönsson, Jan Åke and Mayer, Philipp}},
issn = {{1752-153X}},
language = {{eng}},
publisher = {{Chemistry Central}},
series = {{Chemistry Central Journal}},
title = {{Determining the chemical activity of hydrophobic organic compounds in soil using polymer coated vials}},
url = {{http://dx.doi.org/10.1186/1752-153X-2-8}},
doi = {{10.1186/1752-153X-2-8}},
volume = {{2}},
year = {{2008}},
}