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Showing 1-30 of 443 results for "25467" within Papers
Rachael Hough et al.
Metabolomics : Official journal of the Metabolomic Society, 14(2), 19-19 (2018-01-26)
Disturbance to the hindgut microbiota can be detrimental to equine health. Metabolomics provides a robust approach to studying the functional aspect of hindgut microorganisms. Sample preparation is an important step towards achieving optimal results in the later stages of analysis.
Roberta Letícia Krüger et al.
Environmental monitoring and assessment, 158(1-4), 355-363 (2008-10-28)
This work reports the screening and characterization of odor compounds in gaseous effluents generated during the production of poultry feather and viscera meal, the by-products of the poultry meat industry. Chemical analysis was carried out by solid phase microextraction in
R T Marsili
Advances in experimental medicine and biology, 488, 89-100 (2001-09-08)
A new technique using solid-phase microextraction, mass spectrometry, and multivariate analysis (SPME-MS-MVA) was developed for the study of oxidized off-flavors in foods. The analytical column of a GC-MS system was replaced with a 1-m deactivated fused-silica column, which served as
Eva Gallego et al.
The Science of the total environment, 618, 1440-1448 (2017-11-08)
1,3-Butadiene is a carcinogenic compound that can be emitted to the atmosphere from several sources, such as the combustion of organic matter or traffic. However, petrochemical industry is one of the main origins of this compound. Several campaigns (2013-2017) were
Qichao Zhao et al.
Analytical chemistry, 82(2), 707-713 (2009-12-30)
Two polymeric ionic liquids (PIL) were synthesized and employed as sorbent coatings in solid-phase microextraction (SPME) for the selective extraction of CO(2). The two coatings, poly(1-vinyl-3-hexylimidazolium) bis[(trifluoromethyl)sulfonyl]imide [poly(VHIM-NTf(2))] and poly(1-vinyl-3-hexylimidazolium) taurate [poly(VHIM-taurate)], exhibited varied selectivity toward CO(2) due to functional
Maria Polo et al.
Journal of chromatography. A, 1124(1-2), 11-21 (2006-04-08)
A solid-phase microextraction (SPME) method for the ultra-trace determination of brominated phenols in aqueous samples has been developed and is reported for the first time to the best of our knowledge. 3,5,3',5'-tetrabromobisphenol A (TBBPA), the most widely used brominated flame
Jae Hwan Lee et al.
International journal of analytical chemistry, 2012, 690356-690356 (2012-09-12)
Trimethylsilanol (TMSOH) can cause damage to surfaces of scanner lenses in the semiconductor industry, and there is a critical need to measure and control airborne TMSOH concentrations. This study develops a thermal desorption (TD)-gas chromatography (GC)-mass spectrometry (MS) method for
E Gallego et al.
Talanta, 85(1), 662-672 (2011-06-08)
A simple comparison is made to evaluate the relative performance of active and passive sampling methods for the analysis of volatile organic compounds (VOCs) in ambient air. The active sampling is done through a multi-sorbent bed tube (Carbotrap, Carbopack X
Manuela Abalos et al.
Journal of chromatography. A, 963(1-2), 249-257 (2002-08-22)
An analytical procedure based on headspace solid-phase microextraction (SPME) followed by gas chromatography coupled to mass spectrometry in the electron impact mode has been developed for the determination of low-molecular-mass sulfides and disulfides in wastewater. Parameters affecting to the extraction
Phillip Trefz et al.
Analytical and bioanalytical chemistry, 405(10), 3105-3115 (2013-02-08)
Needle trap devices (NTDs) have shown many advantages such as improved detection limits, reduced sampling time and volume, improved stability, and reproducibility if compared with other techniques used in breath analysis such as solid-phase extraction and solid-phase micro-extraction. Effects of
Alexander A Aksenov et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1061-1062, 17-25 (2017-07-12)
Breath analysis has been gaining popularity as a non-invasive technique that is amenable to a broad range of medical uses. One of the persistent problems hampering the wide application of the breath analysis method is measurement variability of metabolite abundances
Hiroaki Yoshida et al.
Journal of forensic sciences, 53(3), 668-676 (2008-05-13)
A solid-phase microextraction (SPME) procedure involving direct contact between the SPME fibers and the solid matrix and subsequent gas chromatography/mass spectrometric analysis for the detection of accelerants in fire debris is described. The extraction performances of six fibers (100 mum
Carlo Bicchi et al.
Journal of agricultural and food chemistry, 50(3), 449-459 (2002-01-24)
Headspace sorptive extraction (HSSE) and stir bar sorptive extraction (SBSE), two recently introduced solventless enrichment techniques, have been applied to the analysis of the headspace of Arabica roasted coffee and of the headspace of the brew and of the brew
Ki-Hyun Kim et al.
Analytical and bioanalytical chemistry, 405(26), 8397-8408 (2013-08-03)
The combined use of sorbent tubes (ST) and thermal desorption (TD) has become the common practice for the trace-level analysis of gaseous volatile organic compounds (VOCs). In this research, the potential bias in VOC analysis due to the solvent introduced
Sakchaibordee Sungkaew et al.
Analytica chimica acta, 664(1), 49-55 (2010-03-17)
A new polyethylene glycol fiber was developed for solid-phase microextraction (SPME) of styrene by electrodepositing porous Zn film on Ag wire substrate followed by coating with polyethylene glycol sol-gel (Ag/Zn/PEG sol-gel fiber). The scanning electron micrographs of fibers surface revealed
David Machiels et al.
Talanta, 61(4), 529-537 (2008-10-31)
The aroma profile of cooked beef meat has been investigated by solid-phase microextraction (SPME) combined with gas chromatography-mass spectrometry (GC-MS). Out of more than 200 volatile compounds, 36 key odour-active compounds were selected for analysis. Several extraction times, desorption times
M S Altaki et al.
Journal of chromatography. A, 1146(1), 103-109 (2007-02-20)
A headspace-solid-phase microextraction (HS-SPME) coupled to gas chromatography-ion trap mass spectrometry (GC-IT-MS) method is proposed for the analysis of furan in different heat-treated carbohydrate-rich food samples. The extraction efficiency of six commercially available fibres was evaluated and it was found
Stéphanie Legrand et al.
Journal of chromatography. A, 999(1-2), 195-201 (2003-07-30)
The aim of this work was to prove that solid-phase microextraction coupled with gas chromatography could be used for the determination and quantification of residual solvents in drugs. Four solvents were selected for the experiments: ethanol, cyclohexane, triethylamine and pyridine
C Haberhauer-Troyer et al.
Fresenius' journal of analytical chemistry, 366(4), 329-331 (2001-02-28)
The surfaces of commercially available polydimethylsiloxane (PDMS) and Carboxen-PDMS fibers for solid-phase microextraction (SPME) were investigated by optical and electron microscopy. Damage to the coating as well as contamination of new fibers and a highly variable number of pores in
Tomasz Chmiel et al.
Food chemistry, 221, 1041-1056 (2016-12-17)
Most of scientific papers concern the qualitative or semi-quantitative analysis of aroma-active terpenes in liquid food matrices. Therefore, the procedure based on solid-phase microextraction and two-dimensional gas chromatography-time-of-flight mass spectrometry for determination of monoterpenes in fresh berries was developed. The
Federica Pellati et al.
Journal of chromatography. A, 1087(1-2), 265-273 (2005-09-01)
In this study the investigation of the aroma compounds of dried fruits of Evodia rutaecarpa (Juss.) Benth. and E. rutaecarpa (Juss.) Benth. var. officinalis (Dode) Huang (i.e. E. officinalis Dode) (Rutaceae family) was carried out to identify the odorous target
E Gallego et al.
Waste management (New York, N.Y.), 32(12), 2469-2481 (2012-08-14)
Municipal solid waste treatment facilities are generally faced with odorous nuisance problems. Characterizing and determining the odorous charge of indoor air through odour units (OU) is an advantageous approach to evaluate indoor air quality and discomfort. The assessment of the
C Pugliese et al.
Journal of mass spectrometry : JMS, 45(9), 1056-1064 (2010-08-28)
The volatile compounds profile is an important feature for the characterization of dry-cured hams. Some minor typical Italian products, such as 'Toscano' ham, have been poorly studied in regards to their composition of volatile compounds. In this article, we studied
Mona Lärstad et al.
The Analyst, 127(11), 1440-1445 (2002-12-12)
A method for the determination of exhaled ethane, pentane and isoprene was developed and validated. The method was based on pre-concentration of the analytes on a multi-bed solid adsorbent tube containing Tenax TA, Carboxen 569 and Carboxen 1000, thermal desorption
William A McClenny et al.
Journal of environmental monitoring : JEM, 4(5), 695-705 (2002-10-29)
Ambient air spiked with 1-10 ppbv concentrations of 41 toxic volatile organic compounds (VOCs) listed in US Environmental Protection Agency (EPA) Compendium Method TO-14A was monitored using solid sorbents for sample collection and a Varian Saturn 2000 ion trap mass
José David Carrillo et al.
Analytical and bioanalytical chemistry, 385(5), 937-943 (2006-06-23)
Multiple headspace solid-phase microextraction (MHS-SPME) with gas chromatography-mass spectrometry is proposed for quantification of nine volatile oak compounds in aged wines. These compounds are formed and extracted by wine when it is matured in oak barrels and are responsible for
Rosa Ana Pérez et al.
Journal of AOAC International, 91(6), 1409-1415 (2009-02-11)
A method using solid-phase microextraction (SPME) and gas chromatography/mass spectrometry was developed and applied to the determination of volatile compounds generated in meat, at different times, from ground beef stored under refrigeration. Selection of the extractive fiber, extraction time, and
Federica Pellati et al.
Journal of pharmaceutical and biomedical analysis, 84, 103-111 (2013-06-29)
In this study, a novel and efficient method based on headspace solid-phase microextraction (HS-SPME), followed by gas chromatography-mass spectrometry (GC-MS), was developed for the analysis of propolis volatile compounds. The HS-SPME procedure, whose experimental parameters were properly optimized, was carried
H H Jeleń
Letters in applied microbiology, 36(5), 263-267 (2003-04-12)
The influence of isolation methods: solid phase microextraction (SPME) with different fibres and simultaneous distillation extraction (SDE) on the profile of isolated fungal volatile metabolites was investigated. Four SPME fibre types: Polydimethylsiloxane, Polyacrylate, Carboxen/PDMS and Carboxen/Divinylbenzene/PDMS were evaluated in terms
Brett J Savary et al.
Journal of chromatography. A, 1017(1-2), 151-159 (2003-10-31)
A simple, fast, and direct procedure was developed for the simultaneous determination of the methanol and acetic acid present as esters in the plant cell wall polysaccharide pectin. After base-hydrolysis of esters and acidification of pectin samples, headspace solid-phase microextraction
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