Using Performance Reference Compounds in Polyethylene Passive Samplers to Deduce Sediment Porewater Concentrations for Numerous Target Chemicals

Fernandez, Loretta A.; Harvey, Charles F.; Gschwend, Philip M.

doi:10.1021/es901877a

Cited by 95 publications

(127 citation statements)

References 37 publications

Supporting

Mentioning

125

Contrasting

Order By: Relevance

“…At equilibrium, fibers are retrieved from sediment either directly injected into the analytical instrument or solvent extracted into auto sampling vials. In practice, highly hydrophobic compounds will require long times to achieve equilibrium and corrections for disequilibrium are required 52 .…”

Section: Introductionmentioning

confidence: 99%

Demonstration and Evaluation of Solid Phase Microextraction for the Assessment of Bioavailability and Contaminant Mobility

Reible¹,

Lotufo²

2012

View full text Add to dashboard Cite

Standard Form 298 (Rev. 8/98) REPORT DOCUMENTATION PAGEPrescribed by ANSI Std. Z39.18 Form Approved OMB No. 0704-0188The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to the Department of Defense, Executive Services and Communications Directorate (0704-0188). Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. The goal of the project was to develop and standardize a procedure using field deployable solid phase microextraction (SPME) for the measurement of freely-dissolved porewater concentrations of hydrophobic organics and demonstrate the relationship of these measurements to contaminant flux, bioavailability and bioaccumulation. PLEASE DO NOT RETURN YOUR FORM 139Danny Reible 512-471-4642Reset ii EXECUTIVE SUMMARY OBJECTIVES OF THE DEMONSTRATIONThe goal of the project was to develop and standardize a procedure using field deployable solid phase microextraction (SPME) for the measurement of freely-dissolved porewater concentrations of hydrophobic organics and demonstrate the relationship of these measurements to contaminant flux, bioavailability and bioaccumulation.Specific objectives of the PDMS technology for hydrophobic organic compounds include:Determination of mobile and available contaminants in sediments Assessment of bioaccumulation potential in benthic organisms Assessment of vertical chemical profiles in surficial sediments and sediment capsThe work was conducted in sediments both in laboratory and field testing. Laboratory testing allows sediments to be collected and tested in the laboratory, avoiding problematic field deployments where placement and retrieval is too difficult or costly. This testing also allows coupling of availability measurements with laboratory bioassays under controlled conditions avoiding the difficulties and variability of field bioassays. The field testing allows determination of availability and cap performance under conditions that might not be reproducible in the laboratory. All porewater measurements herein were measured in-situ (i.e. in sediments whether field or lab) and require no porewater separation from the sediments prior to analysis. TECHNOLOGY DESCRIPTIONIn-situ solid-phase microextraction (SPME) is a passive sampling approach for measuring hydrophobic organic contaminants in porewater and involves the insertion of a polymer sorbent into the sediments, withdrawal after a period of time, preferably after achievement of equilibrium, and measuring the contaminants sorbed to the polymer. The contaminant conc...

show abstract

Section: Introductionmentioning

confidence: 99%

Demonstration and Evaluation of Solid Phase Microextraction for the Assessment of Bioavailability and Contaminant Mobility

Reible¹,

Lotufo²

2012

View full text Add to dashboard Cite

show abstract

“…As mentioned above, the in-fiber standardization technique has been widely applied for sensing dissolved HOCs in sediment porewater [14,16,8], but requires the use of PRCs, which limits the number of analytes that can be quantified. However, the TWA sampling approach can basically quantify all analytes, as it does not use any PRCs.…”

Section: Quantitative Methods In Passive Samplingmentioning

confidence: 99%

“…Sorption of dissolved organic matter directly to PE strips would artificially increase the amounts of HOCs in PEDs, as demonstrated in the case of PDMS-coated fiber [10]. Table 2 compares the concentrations of PAHs and PCBs in sediment porewater obtained with PED and centrifugation [14], as well as from calibration with organic carbon content in porewater and K OC [16] and lipid-water partition coefficient [9]. The concentration of PCBs (1129 ± 139 ng/L) in sediment porewater under the condition of no resuspension obtained from PEDs was twice that (534 ± 95 ng/L) estimated by lipid-water partitioning [9].…”

Section: Benefits and Shortfalls Of Available Passive Sampling Technimentioning

confidence: 98%

Passive sampling techniques for sensing freely dissolved hydrophobic organic chemicals in sediment porewater

Bao

Zeng

2011

TrAC Trends in Analytical Chemistry

View full text Add to dashboard Cite

“…Any loss would lead to an underestimation of the concentration of the volatile target analyte. In addition, volatile losses of performance reference compounds (PRCs) would lead to an overestimation of the extent of steady state since PRC losses are used to estimate rates of uptake of target compounds [12]. These losses are possible during the processing of the passive sampler between retrieval from the sediment or surface water and extraction into a stable solvent.…”

Section: Introductionmentioning

confidence: 99%

Modeling Compound Loss from Polydimethylsiloxane Passive Samplers

Thomas

Reible

2015

Chromatography

View full text Add to dashboard Cite

Volatile losses were measured from polydimethylsiloxane (PDMS) passive samplers during determination of contaminant porewater concentrations in sediments. Volatile losses could occur between the time of retrieval and processing of the passive sampler or in intertidal environments where the passive sampler could potentially be exposed above the water surface at low tide. A model was developed to predict losses of absorbed compounds as a function of sorbent geometry and the Henry's Law Coefficient and PDMS-water partition coefficient of the compound of interest. The model suggests that thin layers of PDMS typically used to minimize equilibration times in passive sampling (≤30 µm) may not provide quantitative measurement of naphthalenes or other lighter volatile compounds without special efforts to reduce losses. The results suggest that the samplers should be processed rapidly onsite or kept at low temperatures after retrieval to maximize retention of more volatile compounds or designed with thick PDMS layers. The results also suggest that less volatile compounds, including phenanthrene, and higher molecular weight polynuclear aromatic hydrocarbons (PAHs) exhibit minimal evaporative losses with typical sample processing times.

show abstract

Using Performance Reference Compounds in Polyethylene Passive Samplers to Deduce Sediment Porewater Concentrations for Numerous Target Chemicals

Cited by 95 publications

References 37 publications

Demonstration and Evaluation of Solid Phase Microextraction for the Assessment of Bioavailability and Contaminant Mobility

Demonstration and Evaluation of Solid Phase Microextraction for the Assessment of Bioavailability and Contaminant Mobility

Passive sampling techniques for sensing freely dissolved hydrophobic organic chemicals in sediment porewater

Modeling Compound Loss from Polydimethylsiloxane Passive Samplers

Contact Info

Product

Resources

About