Results 141 to 150 of about 9,222 (182)
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Solid Phase Microextraction for Quantitative Headspace Sampling of Apple Volatiles
Analytical Chemistry, 1996Solid phase microextraction (SPME) was evaluated for use in the quantification of aroma volatile production by Granny Smith apples during cool storage. Particular attention was paid to quantifying alpha-farnesene (3,7,11-trimethyldodeca-1,3(E),6(E),10-tetraene) due to its involvement in superficial scald, a disorder of cool stored apples.
A J, Matich, D D, Rowan, N H, Banks
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Rapid determination of organotin compounds by headspace solid-phase microextraction
Journal of Chromatography A, 2003Headspace solid-phase microextraction (SPME) followed by gas chromatography (GC) coupled to pulsed flame photometric detection have been investigated for the simultaneous speciation analysis of 14 organotin compounds, including methyl-, butyl-, phenyl-, and octyltins compounds. The analytical process (sorption on SPME fibre and thermal desorption in GC
Le Gac, M. +2 more
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Coupling of Dynamic Headspace Sampling and Solid Phase Microextraction
Chromatographia, 2004A simple lab-made apparatus allowing the use of a SPME fiber as sorptive device for isolation of analytes from varied samples using dynamic headspace sampling (DHS) is presented here. The principal parameters for the operation of this device - the extraction time and the flow of purging gas - were studied using aqueous test solutions of volatile and ...
R. C. Silva, P. M. S. Aguiar, F. Augusto
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Headspace solid‐phase microextraction analysis of artificial flavors
Journal of the Science of Food and Agriculture, 2005AbstractUsing a non‐equilibrated solid‐phase microextraction/gas chromatography/mass spectrometry technique, differentiation between a wide variety of types and examples of artificial flavors has been demonstrated. Addition of an internal standard to the samples, as received, allowed for the calculation of yields on a µg g−1 basis for the majority of ...
William M Coleman, Michael F Dube
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Optimisation of headspace solid-phase microextraction for analysis of aromatic compounds in vinegar
Journal of Chromatography A, 2002Headspace solid-phase microextraction has been applied to the analysis of aroma compounds in vinegar. Silica fibre coated with Carboxen-polydimethylsiloxane was found to be more efficient at extracting these compounds than other fibres such as those coated with polydimethylsiloxane, Carbowax-divinylbenzene, and polydimethylsiloxane-divinylbenzene, but ...
Remedios, Castro Mejías +3 more
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Headspace solid‐phase microextraction of cannabinoids in human head hair samples
Journal of Separation Science, 2007AbstractA fast method was optimized and validated with the aim to detect cannabinoids (cannabidiol, cannabinol, and Δ‐9‐tetrahydrocannabinol) in human head hair samples. The method was based on an initial procedure of external decontamination of hair samples (10 mg) with petroleum ether, followed by alkaline digestion and further extraction of ...
Carolina, Dizioli Rodrigues de Oliveira +2 more
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Headspace solid‐phase microextraction for direct determination of volatile phenols in cider
Journal of Separation Science, 2009AbstractA headspace solid‐phase microextraction coupled to gas chromatography‐tandem mass spectrometry (GC‐MS/MS) method was optimised and validated for the determination of 4‐ethylguaiacol, 4‐ethylphenol, 4‐vinylguaiacol and 4‐vinylphenol, involved in the presence of Brett character, in ciders.
Consuelo, Pizarro +2 more
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Optimization of Headspace Solid-Phase Microextraction for Analysis of Wine Aroma Compounds
American Journal of Enology and Viticulture, 2000Headspace solid-phase microextraction (SPME) is a fast and simple sampling method for analysis of volatile compounds, but quantitation can be affected by sample matrix and sampling conditions. Sampling time and temperature are particularly important in controlling analyte response, and the effects vary for different compound classes and volatilities ...
Whiton, R. S., Zoecklein, Bruce W.
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Analytica Chimica Acta, 2013
Multiple headspace-solid phase microextraction (MHS-SPME) followed by gas chromatography/mass spectrometry (GC-MS) and flame ionization detection (GC-FID) was applied to the identification and quantification of volatiles released by the mushroom Agaricus bisporus, also known as champignon.
COSTA, ROSARIA +4 more
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Multiple headspace-solid phase microextraction (MHS-SPME) followed by gas chromatography/mass spectrometry (GC-MS) and flame ionization detection (GC-FID) was applied to the identification and quantification of volatiles released by the mushroom Agaricus bisporus, also known as champignon.
COSTA, ROSARIA +4 more
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Headspace solid-phase microextraction analysis of volatile components of spices
Chromatographia, 2002Headspace solid-phase microextraction (HSSPME) coupled with gas chromatography-mass spectrometry (GC-MS) has been used to isolate volatile compounds from three different spices (basil, oregano, and bay leaves). SPME conditions were optimized before the experimental extractions, to achieve optimum recovery of the volatile compounds.
M. C. Díaz-Maroto +2 more
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