Equilibrium in-fibre standardisation technique for solid-phase microextraction

Wang, Yanxiang; O’Reilly, John W.; Chen, Yong; Pawliszyn, Janusz

doi:10.1016/j.chroma.2004.12.084

Cited by 123 publications

(99 citation statements)

References 5 publications

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“…Control over consistency of performance for SPME was obtained by the equilibrium in-fibre internal standardization procedure [14,15] The Internal Standard loading onto the SPME device was as follows: the SPME device was manually inserted into a 20 mL sealed vial containing 2 mL of ultra-pure water to which 2 µL of α-thujone (ISTD) standard working solution at 7.0 µg/mL was added. α-Thujone is known to be absent in mint volatile fraction [ref].…”

Section: Methodsmentioning

confidence: 99%

HS-SPME-GC×GC-qMS volatile metabolite profiling of Chrysolina herbacea frass and Mentha spp. leaves

et al. 2011

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The definitive version is available at: La versione definitiva è disponibile alla URL: [http://link.springer.com/article/10.1007/s00216-011-5600-4#page AbstractHeadspace solid-phase microextraction (HS-SPME) comprehensive two-dimensional (2D) gas chromatography combined with quadrupole-mass spectrometry (GCxGC-qMS) with dedicated comparative data elaboration was applied to separate chemical patterns arising from the interaction between some Mentha species and the herbivore Chrysolina herbacea, also known as the mint bug.Upon feeding on different Mentha species (M. spicata L., M. x piperita L. and M. longifolia L.), C. herbacea produced frass (faeces) which were characterized by a typical volatile fraction. HS-SPME GCxGC-qMS analysis of the complex volatile fraction of both mint leaf and C. herbacea frass was submitted to advanced fingerprinting analysis of 2D chromatographic data. 1,8-Cineole, found in the leaves of all the Mentha species examined, was oxidized and C. herbacea frass yielded high rates of several hydroxy-1,8-cineoles, including 2α-hydroxy-, 3α-hydroxy-, 3β-hydroxy-and 9-hydroxy-1,8-cineole. Upon insect feeding, several unknown oxidized monoterpenes, a p-menthane diol and three unknown phenylpropanoids were also detected in the frass volatiles. In M. longifolia, the occurrence of the monoterpene piperitenone oxide was found to be toxic and associated with insect death. The results of this work show that high throughput techniques such as HS-SPME and GCxGC-qMS fingerprint analysis are ideal tools to analyze complex volatile matrices, and provide a sensitive method for the direct comparison and chemical visualization of plant and insect emitted volatile components.

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Section: Methodsmentioning

confidence: 99%

HS-SPME-GC×GC-qMS volatile metabolite profiling of Chrysolina herbacea frass and Mentha spp. leaves

et al. 2011

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“…Because loss or damage of samplers in field deployment is inevitable, prolonged sampling time would restrict the utility of passive samplers in field applications. To mitigate this problem, particularly for passive sampling of HOCs in sediment porewater, k e can be estimated by the desorption of pre-loaded performance reference compounds (PRCs) in the sorbent phase, which is first applied in SPME fiber and then is referred to as an infiber standardization technique [12]. So, combined with Equation (2), the dissolved HOC concentration in sediment porewater can be estimated by:…”

Section: Quantitative Methods In Passive Samplingmentioning

confidence: 99%

“…Fernandez et al [8] also reported that pyrene and chrysene concentrations in sediment porewater calibrated by phenanthrene-d 10 Kinetic diffusion-controlled sampling methods, such as the in-fiber standardization technique [12] and TWA sampling [17], are time efficient, requiring sampling time varying from days to weeks. 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.…”

Section: Quantitative Methods In Passive Samplingmentioning

confidence: 99%

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

Bao

Zeng

2011

TrAC Trends in Analytical Chemistry

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“…Salting that no solvents are required and all the material that is extracted by the probe may be analysed directly. The problem of variation in extraction conditions has been addressed by pre-loading of the extraction phase with an internal standard, and then measuring both analyte uptake and internal standard loss from the extraction phase (Wang et al, 2005).…”

Section: Solid-phase Micro-extractionmentioning

confidence: 99%

Micro‐extraction techniques in analytical toxicology: short review

Flanagan

Morgan

Spencer

et al. 2006

Biomedical Chromatography

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This paper discusses new developments in plasma micro-extraction techniques in the context of established micro-extraction and protein precipitation methodology. Simple liquid-liquid solvent extraction (LLE) of plasma with direct GC or HPLC analysis of the resulting extract has been used for many years. Butyl acetate and methyl t-butyl ether (MTBE) give efficient extraction of many drugs and metabolites from small volumes of plasma or whole blood at an appropriate pH, and form the upper layer, thus simplifying extract removal. Butyl acetate does not interfere with NPD, ECD or MS in GC, whilst MTBE has a relatively low UV cutoff (220 nm). Thus, HPLC eluents that use a high proportion of an organic component allow MTBE extracts to be analysed directly. 'Salting-out' and extractive derivatization using acetic anhydride or phenylboronic acid can be used with appropriate analytes. As regards protein precipitation, an important consideration is lowering the pH, although this is not feasible with acid-labile analytes. More recent developments include sold-phase micro-extraction (SPME) and liquid-phase micro-extraction (LPME). This latter technique especially may prove invaluable as analytes that cannot easily be extracted with LLE can be isolated simply at low cost with a minimum of apparatus.

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Equilibrium in-fibre standardisation technique for solid-phase microextraction

Cited by 123 publications

References 5 publications

HS-SPME-GC×GC-qMS volatile metabolite profiling of Chrysolina herbacea frass and Mentha spp. leaves

HS-SPME-GC×GC-qMS volatile metabolite profiling of Chrysolina herbacea frass and Mentha spp. leaves

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

Micro‐extraction techniques in analytical toxicology: short review

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