Extracted amounts by solid-phase microextraction: A realistic approach to the partition coefficient K
Louise Urruty,Michel Montury +1 more
TLDR
In this paper, a depletion experiment method is suggested that consists of running several SPMEs from the same standard sample with the same conditions and fitting the resulting data into an experimental regression curve, the exponential coefficient of which affords an absorption coefficient characteristic of the fiber/analyte system in a defined work-up.Abstract:
Because of its numerous advantages, the solventless solid-phase microextraction (SPME) sampling method coupled with an efficient chromatographic technique is used more and more to develop new analytical methods pertaining to organic molecules at low concentration in aqueous solutions, especially in the field of environmental chemistry. In a usual analytical procedure, the amount of analyte extracted by the fiber need not be determined, because the quantitation step of the analysis is mainly achieved using SPME external calibration. For some purposes, however, the determination of the partition coefficient K relative to a particular fiber for a specific analyte (for example) has to be calculated with accuracy. The traditional method consists of determining the response coefficient of the detector used for the analyte through a direct-injection calibration curve made from standard solutions in organic solvents and reporting it with the signal observed for the analytical sample. For the same goal, a depletion experiment method is suggested that consists of running several SPMEs from the same standard sample with the same conditions and then fitting the resulting data into an experimental regression curve, the exponential coefficient of which affords an absorption coefficient characteristic of the fiber/analyte system in a defined work-up. This self-calibrating method is revealed to be much more accurate than the previous one. Four pesticides in water solution were chosen to exemplify this study.read more
Citations
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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?
TL;DR: 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.
Journal ArticleDOI
Solid-phase microextraction fibre-water distribution constants of more hydrophobic organic compounds and their correlations with octanol-water partition coefficients.
A. Paschke,Peter Popp +1 more
TL;DR: Fibre coating-water distribution constants (Kfw) of more hydrophobic chemicals were determined with six different solid-phase microextraction fibre types by fibre exposure to agitated large-volume water samples lasting several days, comparable with Kfw values obtained under dynamic conditions.
Journal ArticleDOI
Determination of phenylurea herbicides in natural waters at concentrations below 1 ng l−1 using solid-phase extraction, derivatization, and solid-phase microextraction–gas chromatography–mass spectrometry
TL;DR: The precision and sensitivity of the developed analytical method allowed the investigation of the fate of PUHs in lakes, their degradation during drinking water treatment and their transport within the North Sea.
Journal ArticleDOI
Simultaneous multi-elemental speciation analysis of organometallic compounds by solid-phase microextraction and multicapillary gas chromatography hyphenated to inductively coupled plasma-time-of-flight-mass spectrometry
TL;DR: In this paper, a simple, rapid and accurate method on the basis of solid phase microextraction (SPME) in combination with multicapillary gas chromatography hyphenated to inductively coupled plasma-time-of-flight mass spectrometry (ICP-TOFMS) was developed for simultaneous speciation analysis of 10 organometallic compounds of mercury (including inorganic mercury), tin and lead.
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Multiple solid-phase microextraction: Theory and applications
TL;DR: A review of the state of the art in MSPME, including theory and applications, can be found in this article, where the authors also discuss the limits of detection and quantification, and the use of this methodology to determine fiber-sample distribution constant.
References
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Book
Solid phase microextraction : theory and practice
TL;DR: The inventor of the technique, Janusz Pawliszyn, describes the theoretical and practical aspects of this new technology, which received an "RD" rating.
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Automation and optimization of solid-phase microextraction
TL;DR: The solid phase microextraction (SPME) technique as mentioned in this paper involves exposing a fused silica fiber that has been coated with a stationary phase to and aqueous solution containing organic contaminants.
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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.
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Solid Phase Microextraction for Quantitative Analysis in Nonequilibrium Situations
TL;DR: In this article, a theoretical model is proposed to deal with the dynamic adsorption process of solid phase microextraction (SPME), and a steady-state diffusion is assumed for SPME in an effectively agitated sampling medium.
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Analysis of Substituted Benzene Compounds in Groundwater Using Solid-Phase Microextraction
TL;DR: In this paper, Solid Phase Microextraction (SPME) was applied to the analysis of benzene, toluene, ethyl benzene and xylenes in groundwater.