Journal ArticleDOI
Sorption of Very Hydrophobic Organic Compounds onto Poly(dimethylsiloxane) and Dissolved Humic Organic Matter. 1. Adsorption or Partitioning of VHOC on PDMS-Coated Solid-Phase Microextraction FibersA Never-Ending Story?
TLDR
In this paper, the problem of analyte extraction by poly(dimethylsiloxane) (PDMS) fiber coatings turned out to be mainly attributed to experimental errors when applying conventional static SPME approaches.Abstract:
Solid-phase microextraction (SPME) using nonpolar fiber coatings is a very useful method for determining concentrations (more precisely, activities) of environmentally relevant very hydrophobic organic compounds (VHOC: alkanes, PCBs, and PAHs). The issue of adsorption (surface effect) versus absorption (partitioning) is of huge importance for the application of SPME to determine VHOC in environmental samples. Competition effects, which are associated with adsorption processes, would result in concentration-dependent and mixture-dependent responses. The confusion in the literature about the processes responsible for analyte extraction by the poly(dimethylsiloxane) (PDMS) fiber coatings turned out to be mainly attributed to experimental errors when applying conventional static SPME approaches. Determining fiber coating distribution coefficients (Kf) using dynamic systems is more accurate in comparison with static systems because analyte losses in the system (due to the fiber uptake, sorption on the walls, ...read more
Citations
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Journal ArticleDOI
Sorption capacity of plastic debris for hydrophobic organic chemicals
TL;DR: High sorption capacity of microplastics implies the importance of MP-associated transport of HOCs in the marine environment and partition coefficients between MPs and seawater measured showed good linear correlations with log Kow.
Journal ArticleDOI
Nondestructive sampling of living systems using in vivo solid-phase microextraction.
TL;DR: Nondestructive Sampling of Living Systems Using in Vivo Solid-Phase Microextraction Gangfeng Ouyang, Dajana Vuckovic, and Janusz Pawliszyn.
Journal ArticleDOI
Congener-specific dechlorination of dissolved PCBs by microscale and nanoscale zerovalent iron in a water/methanol solution.
TL;DR: PCB dechlorination is rapid enough that nanoscale ZVI may offer novel in situ remedial alternatives for PCB-contaminated sediments and provides insight into structure-activity relationships between PCB isomers, and compares the reactivity of nanoscales ZVI to that of palladized microscale ZVI.
Journal ArticleDOI
Sensing Dissolved Sediment Porewater Concentrations of Persistent and Bioaccumulative Pollutants Using Disposable Solid-Phase Microextraction Fibers
Philipp Mayer,Wouter H. J. Vaes,Femke G. Wijnker,Karin C. H. M. Legierse,Rik Kraaij,Johannes Tolls,Joop L. M. Hermens +6 more
TL;DR: The matrix solid-phase microextraction (matrix-SPME) as mentioned in this paper was applied as a disposable sampler to measure dissolved concentrations of persistent and bioaccumulative pollutants (PBPs) in sediment porewater.
Journal ArticleDOI
Polyoxymethylene solid phase extraction as a partitioning method for hydrophobic organic chemicals in sediment and soot
TL;DR: Application of POM for the determination of distribution coefficients for soot and sediment (POM-SPE method) resulted in highly reproducible values and was validated by comparing values for sediment with results for the same sediment determined using the cosolvent method.
References
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Journal ArticleDOI
Rapid determination of polyaromatic hydrocarbons and polychlorinated biphenyls in water using solid-phase microextraction and GC/MS.
David W. Potter,Janusz Pawliszyn +1 more
TL;DR: Solid-phase microextraction was investigated as a solvent-free alternative method for the extraction and analysis of nonpolar semivolatile analytes and eliminates the loss of analytes through adsorption onto container walls and saves transport costs.
Journal ArticleDOI
Theory of analyte extraction by selected porous polymer SPME fibres
TL;DR: In this paper, the authors presented theoretical description of the extraction process for adsorption-type fibres, including PDMS-DVB (divinyl benzene), Carbowax−DVB, and CARBOWAX-TR (template resin).
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Analysis of organochlorine pesticides using solid-phase microextraction
Sonia Magdic,Janusz Pawliszyn +1 more
TL;DR: A solid-phase microextraction (SPME) procedure has been developed to successfully extract eighteen chlorine-containing pesticides from water using a fused-silica fiber coated with a non-polar polydimethylsiloxane stationary phase.
Journal ArticleDOI
Absorption of hydrophobic compounds into the poly(dimethylsiloxane) coating of solid-phase microextraction fibers: high partition coefficients and fluorescence microscopy images.
TL;DR: A new method is applied, which minimizes the impact of experimental artifacts, to determine PDMS water partition coefficients of 17 hydrophobic analytes including chlorinated benzenes, PCBs, PAHs, and p,p'-DDE, which strongly suggest that the retention of hydrophilic organic substances is governed by partitioning into the PDMS coating.
Journal ArticleDOI
Environmental analysis of organic compounds in water using solid phase micro extraction
TL;DR: The sensitivity of the method was determined by the thickness of the film of stationary phase; the equilibration time, however, increased with the film thickness, although it can be minimized by use of a cross-shaped stirrer bar as discussed by the authors.