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Showing 1 to 20 of 42 for “"solid phase microextraction (SPME)"”.
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Extraction of alcohols from gasoline using solid phase microextraction (SPME)
… and quantification of EtOH in gasoline by solid phase microextraction (SPME). The major problem in quantifying EtOH in gasoline is the coelution of hydrocarbons with EtOH. There have been several approaches to solve this problem; among the chromatographic ones, three major types have been …
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Characterization of human skin emanations by Solid Phase Microextraction (SPME) extraction of volatiles and subsequent analysis by Gas Chromatography-Mass Spectrometry (GC-MS)
… headspace above samples were extracted by a solid-phase microextraction fiber which incorporated a composite coating of liquid polymer matrix and solid porous particles. This protocol provided robust and convenient signatures of human skin emanations and was applied to two experiments for …
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Estudio analítico de compuestos volátiles en vino: caracterización quimiométrica de distintas denominaciones de origen
… extraction, Continuous liquid-liquid extraction, Microextraction, Solid-phase extraction (SPE) and Solid-phase microextraction (SPME). The advantages and disadvantages of the methods have been evaluated. Also, the sensitivity and reproducibility have been compared. The study has been applied to 12 …
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The analysis of organic ballistic materials
… chromatography/mass chromatography (GC/MS) and solid phase microextraction (SPME) methodologies have been developed for the extraction and analysis of compounds encountered in relation to unburned propellant powders from firearm ammunitions. These methods allowed the detection of 27 compounds …
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DEVELOPMENT AND APPLICATION OF MINIATURIZED SAMPLE PREPARATION TECHNIQUES COMBINED WITH GAS CHROMATOGRAPHY-MASS SPECTROMETRY IN ENVIRONMENTAL ANALYSIS
… for environmental analysis. For sorbent-based microextraction, the applicability and feasibility of graphene or modified graphene as sorbent was investigated and evaluated. The possibility of graphene serving as sorbent was first explored in micro-solid-phase extraction. To further investigate …
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Biomarkers of Lipid Oxidation in the Oral Cavity
… analysis is crucial. This study utilizes both solid phase microextraction (SPME) and micromachined silicon micropreconcentrators to concentrate compounds in breath to optimize analysis.
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Gas Chromatography: Mass Spectrometry of Chemical Agents and Related Interferents
… spectrometry (GC-MS) system with solid phase microextraction (SPME) sampling for point detection of chemical agents. The objective is to minimize the analysis time between sampling and detection of a potential chemical threat. SPME offers a convenient means for sampling gaseous and …
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Solid phase microextraction of amino-dinitrotoluenes in tissue.
… in environmental matrixes and tissues. Solid phase microextraction (SPME) was used to extract ADNTs (amino-dinitrotoluenes) from tissue as a potential method to investigate the recalcitrance of metabolically-generated ADNTs versus absorbed ADNTs. Tubifex tubifex was allowed to metabolize …
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The Analysis of Flavor Compounds in Green Tea Using Ice Concentration Linked with Extractive Stirrer (Icecles)
… (ASE), microwave-assisted extraction (MAE), solid-phase extraction (SPE), solid-phase microextraction (SPME), and stir bar sorptive extraction (SBSE). Although each of these techniques works well, they each have a number of disadvantages, including selectivity, relatively high cost, long …
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The Effect of Wine Matrix Ingredients on 3-Alkyl-2-methoxypyrazines Measurements by Headspace Solid-Phase Microextraction (HS-SPME)
… 3-alkyl-2-methoxypyrazines was investigated with solid-phase microextraction (SPME) and capillary gas chromatography, using a nitrogen phosphorus detector. Changes in the recovery of 3-ethyl-, isopropyl-, sec-butyl-, and isobutyl-2-methoxypyrazines from the static headspace of synthetic wine …
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On-trap derivatization of short-chain fatty acids
… studies by others using multibed-sorbent traps, solid phase microextraction (SPME), and on-fiber derivatization with SPME showed that it is possible to achieve low limits of detection (LODs) for the gas chromatographic (GC) headspace analysis of SCFAs. The goal of this project was to achieve …
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Polyethylene devices and the effects of sediment resuspension on the cycling of PAHs and PCBs in the lower Hudson Estuary
… Like semipermeable membrane devices (SPMDs) and solid-phase microextraction (SPME), PEDs passively measure the concentration of chemical present in the dissolved phase. PEDs provide for in situ, time-averaged measurements with fast equilibration times (on the order of days) and simple laboratory …
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Estudio y modelización de la contaminación del acuífero del río Najerilla: aplicación de la microextracción en fase sólida para la determinación de los contaminantes
… compounds from polluted groundwater samples by solid-Phase Microextraction (SPME) coupled with gas chromatography (CG) is developed. Different types of fibres were studied and the extraction process was optimised. The fibre that proved to be the best to analyse this kind of samples was …
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High throughput analysis to study emerging pollutants and nanoparticle fate in biological systems
… and one is freeze-thaw-equilibration head space-solid phase microextraction (SPME) followed by gas chromatography-mass spectrometry (GC-MS) method for volatile EFCs analysis in three species of crop plant; and one is single particle-inductively coupled plasma-mass spectrometry (SP-ICP-MS) method …
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Sample Preparation/Concentration for Trace Analysis in GC/MS (A study of solid phase microextraction and headspace sampling)
Solid Phase Microextraction (SPME) associated with Microwave Assisted Extraction (MAE)<sup>(1-3)</sup> , on-line headspace derivatization <sup>(4-6)</sup> and the selectivity of different SPME coatings <sup>(7)</sup> were studied. Trace amounts of Veltol ®, Veltol Plus® and short chain fatty acids …
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Effect of Foliar Nitrogen and Sulfur Applications on Aroma Profile of Vitis vinifera L. cv. Petit Manseng using Modified Quantitative Descriptive Analysis, SPME GC-MS and Electronic Nose Technology
… or enzyme hydrolysis of precursor fractions. Solid phase microextraction (SPME) and gas chromatography-mass spectrometry (GC/MS) analysis identified 27 free aroma and flavor compounds and 52 bound compounds. Lactones and carboxylic acids were the major components of the free fractions while …
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Chemical Profiling of Ballistic Materials - Analysis of organic gunshot residue
… for the characterisation of propellants. Solid-phase microextraction (SPME), however, was the superior method for the extraction of OGSR compounds from various sampling media, including swabs and stubs. The optimised methodology involves GSR collection using carbon adhesive stubs followed …
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Evaluating the Impact of Environmental Conditions on the Cocaine Odorant Methyl Benzoate
… analog. The odor was extracted and analyzed with solid phase microextraction (SPME) coupled to gas chromatography/mass spectrometry (GC/MS). The methyl benzoate sample was exposed to the environment by removing the vial cap, with the targeted environmental conditions inside of the chamber of …
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QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) Extraction – Gas Chromatography for the Analysis of Drugs
… liquid-liquid extraction (LLE) and a dispersive solid phase extraction (d-SPE) clean up, QuEChERS provides a clean sample for analysis by gas chromatography (GC) or liquid chromatography (LC) and is commonly used for samples with complex matrices.</p> <p>The goal of this work was to expand the …
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Evaluation of the Odor Compounds Sensed by Explosive-Detecting Canines
… solvents, and plasticizers. Headspace (HS) and solid phase microextraction (SPME) coupled with gas chromatography/mass spectrometry (GC/MS) were used to determine what chemical compounds are contained within the headspace of an explosive as well as NESTT (Non-Hazardous Explosive for Security …
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