Kinetics of solid-phase extraction and solid-phase microextraction in thin adsorbent layer with saturation sorption isotherm

Semenov, Semen N.; Kozieł, Jacek A.; Pawliszyn, Janusz

doi:10.1016/s0021-9673(99)01338-2

Cited by 51 publications

(40 citation statements)

References 9 publications

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“…Small volume of the extraction phase induces competition between different analytes, which may leads to the lower recovery and lower sensitivity in some cases. Figure 1 explains the effect of the competitive adsorption [43]. The figure shows the responses corresponding to the ethyl esters of butanoic, hexanoic, octanoic, and decanoic acid as a function of extraction time.…”

Section: Resultsmentioning

confidence: 99%

SPME – A valuable tool for investigation of flower scent

Barták¹,

Bednář²,

Čáp³

et al. 2003

J of Separation Science

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A novel Headspace Solid Phase Microextraction (HS-SPME) protocol is proposed for the analysis of floral scent. Volatile compounds emitted from the flower are collected on a Carboxen/PDMS fiber for 1 hour, transferred to the GC, and analyzed by GC/ MS. The method completely eliminates the use of organic solvents, does not require special instrumentation, and may readily be performed in the field without access to mains electricity and other energy supplies. The method is robust, sensitive, and reduces the sampling stress on the investigated plant. Since enzymatic reactions in living flowers may cause changes in the composition of emitted fragrance, dried rosemary (Rosmarinus officinalis L.) was used as a stable standard for the method development and optimization. In addition, grape wine was also suggested as homogeneous, bio-compatible, and relatively stable standard of pronounced and typical scent for the same purpose. The optimized method was used for the comparative investigation of the fragrances emitted by two different species -Lathyrus vernus (L.) and Orchis pallens (L.). Several monoterpenes (C10 compounds) were found as the main fragrance components of lathyrus, while sesquiterpenes (C15 compounds) were typical for the orchid.

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Section: Resultsmentioning

confidence: 99%

SPME – A valuable tool for investigation of flower scent

Barták¹,

Bednář²,

Čáp³

et al. 2003

J of Separation Science

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“…Size-exclusion chromatography (SEC) was regarded as a suitable alternative method for improving previous cleanup procedures [28,29]. It had not been used previously for the cleanup of PAHs or any other persistent pollutants from conifer needles, deciduous leaves, and mosses.…”

Section: Introductionmentioning

confidence: 99%

One-step cleanup for PAH residue analysis in plant matrices using size-exclusion chromatography

et al. 2003

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A new one-step cleanup procedure, based on size-exclusion chromatography (SEC), usable for the extracts from accelerated solvent extraction (ASE), Soxhlet extraction, or ultrasonic extraction (USE), is described. The method is suitable for the determination of polycyclic aromatic hydrocarbons (PAHs), especially from very complicated plant matrices (e.g. pine needles, deciduous leaves, mosses). The main improvement compared with previous conventional procedures is that analyte peaks barely overlap with matrix peaks in the chromatograms and that it is a very rapid and simple one-step procedure with clearly improved analytical performance. Essential advantages of this SEC procedure are the sharper GC-MS chromatograms for the PAH fraction at retention times between 9.2 and 12.0 min, distinctly separated substance peaks resulting in better analysis, shorter running times, and lower solvent consumption.

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“…When an SPME porous solid-coated fiber is exposed to an agitated sample matrix, the adsorption of the analytes from the sample to the fiber porous surface occurs [19]. Based on this model, equilibration time (t eq ) for solid sorbents in practical agitation conditions is proportional to the adsorbent layer thickness (h) and adsorption partition constant (K A ) (Eq.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

Enhancing extraction rate in solid‐phase microextraction by using nano‐structured polyaniline coating

Mehdinia

Mousavi

2008

J of Separation Science

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The decrement of equilibrium extraction time without losing extraction efficiency in solid-phase microextraction (SPME) was achieved using nano-structured coating. Polyaniline (PANI) was used as an extraction phase for the comparison of extraction capacity and equilibrium extraction time of nano- and micro-structured coatings. Polychlorinated biphenyls (PCBs) were used as model compounds to examine the extraction properties of nano- and micro-structured coatings. The results revealed that nano-structured PANI coating showed higher extraction rate and shorter desorption time than micro-structured coating, because of the larger surface area. In order to evaluate the extraction capability of prepared nano-structured PANI coating, headspace-SPME method was used for the determination of PCBs in sediment samples by GC-electron capture detector. The proposed method was validated using the certified reference material.

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Kinetics of solid-phase extraction and solid-phase microextraction in thin adsorbent layer with saturation sorption isotherm

Cited by 51 publications

References 9 publications

SPME – A valuable tool for investigation of flower scent

SPME – A valuable tool for investigation of flower scent

One-step cleanup for PAH residue analysis in plant matrices using size-exclusion chromatography

Enhancing extraction rate in solid‐phase microextraction by using nano‐structured polyaniline coating

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