Integrative sampling properties of Empore SDB-disks - using desorption of polar organic compounds from PDMS to assess effects of environmental factors on passive sampling

Vermeirssen, Etienne, Escher, Beate, Van der Voet, Jurgen and Hollender, Juliane (2010). Integrative sampling properties of Empore SDB-disks - using desorption of polar organic compounds from PDMS to assess effects of environmental factors on passive sampling. In: SETAC Europe 20th Annual Meeting, Seville, Spain, (). 23-27 May 2010.

Author Vermeirssen, Etienne
Escher, Beate
Van der Voet, Jurgen
Hollender, Juliane
Title of paper Integrative sampling properties of Empore SDB-disks - using desorption of polar organic compounds from PDMS to assess effects of environmental factors on passive sampling
Conference name SETAC Europe 20th Annual Meeting
Conference location Seville, Spain
Conference dates 23-27 May 2010
Publication Year 2010
Year available 2010
Sub-type Published abstract
Language eng
Abstract/Summary Empore SDB disks have been used as a receiving phase in passive samplers for polar organic compounds. However, there is uncertainty with respect to the duration of integrative sampling of SDB disks. Thus, using chemicals with an octanol water partitioning coefficient (logKow) between 0 and 4, we explored the duration of integrative sampling in short (one week) and long-term experiments (four weeks). Trials were conducted in a channel system (450 L) that receives a constant input of ambient river water at 20 L/h. Water in the channel system was dosed continuously with a cocktail of chemicals (mainly pesticides and pharmaceuticals) to reach aqueous concentrations of 1000 ng/L. At the start of a trial, the channels were filled with 20 SDB disks. During the trials, water was sampled frequently and disks were removed at intervals and extracted. Using LC/MS/MS, spiked compounds were analysed in SDB extracts and in water samples. Sampling time was plotted against concentrations in SDB disks to determine the duration of integrative sampling. Passive sampling of polar compounds with SDB disks is dependent of environmental factors such as the water flow rate. Unfortunately, this dependency cannot simply be corrected for by using the established performance reference compound (PRC) technique: adsorption and desorption are not isokinetic for SDB. For these reasons we explored the possibilities of a surrogate system to adjust passive sampling data for environmental effects: PDMS disks spiked with PRCs in tandem with SDB disks as the sampling phase. First, we established the diffusion parameters and the desorption kinetics of a cocktail of chemicals from PDMS. Second, we used the channels to assess the effect of flow on sampling by SDB disks in tandem with desorption from PDMS disks.
Subjects 030104 Immunological and Bioassay Methods
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status Unknown
Additional Notes subject codes to be verified by Prof Beate Escher. Abstracts available online - purchased by Beate Escher. 314/463

Document type: Conference Paper
Collection: National Research Centre for Environmental Toxicology Publications
 
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Created: Thu, 17 Feb 2011, 09:44:27 EST by Manjit Sanghera on behalf of National Res Centre For Environmental Toxicology