搜索范围
24241-U
应用筛选条件
关键词:'24241-U'
显示 1-30 共 441 条结果 关于 "24241-U" 范围 论文
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
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
Olivia Pinho et al.
Journal of chromatography. A, 1121(2), 145-153 (2006-05-12)
A simple and sensitive method for the analysis of beer volatile compounds was optimised using headspace solid-phase microextraction (SPME) and gas chromatography with mass detection. Headspace SPME using a 75 microm Carboxen-polydimethylsiloxane (CAR-PDMS) fiber provided effective sample enrichment and enabled
Jin-Aa Oh et al.
Analytica chimica acta, 950, 57-63 (2016-12-06)
A headspace solid-phase micro extraction (HS-SPME) and gas chromatography-tandem mass spectrometric (GC-MS/MS) method is described to detect hydrazine after derivatization with 1,1,1-trifluoro-2,4-pentanedione (1,1,1-TFPD) to 3-methyl-5-(trifluoromethyl) pyrazole in industrial waste water. The following optimal HS-SPME conditions were used: 85 μm-carboxen-polydimethylsiloxane fibre, 100 mg L-1
J P Pérez-Trujillo et al.
Journal of chromatography. A, 963(1-2), 95-105 (2002-08-22)
A solid-phase microextraction (SPME) procedure using three commercialised fibers (Carbowax-divinylbenzene, Carboxen-polydimethylsiloxane and divinylbenzene-Carboxen-polydimethylsiloxane) is presented for the determination of a selected group of organochlorine compounds in water samples. The extraction performances of these compounds were compared using fibers with two
Antonia María Carro et al.
Analytical and bioanalytical chemistry, 394(3), 893-901 (2009-04-11)
The headspace solid-phase micro-extraction technique with on-fibre derivatisation followed by gas chromatography-tandem mass spectrometry has been evaluated for the analysis of 1,3-dichloro-2-propanol in water. An asymmetric factorial design has been performed to study the influence of five experimental factors: extraction
A Sanches-Silva et al.
Journal of chromatography. A, 1064(2), 239-245 (2005-03-03)
Headspace solid-phase microextraction (HS-SPME) was studied as a solvent free alternative method for the extraction and characterisation of volatile compounds in stored potato crisps by capillary gas chromatography coupled with mass detection. Better results were obtained when extraction was carried
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
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
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
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
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
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
P Marín et al.
Journal of occupational and environmental hygiene, 10(3), 132-142 (2013-01-30)
Passive sampling is a well-established methodology for the evaluation of exposures to environmental volatile organic compounds (VOCs). The solid-phase microextraction (SPME) technique is a reliable means of sampling VOCs in air. SPME is also being applied as a passive sampler
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
Annika T Nielsen et al.
The Analyst, 127(8), 1045-1049 (2002-08-28)
A method was developed for the simultaneous determination of the following nine volatile sulfur compounds in gas samples: carbon disulfide, carbonyl sulfide, ethyl sulfide, ethyl methyl sulfide, hydrogen sulfide, isopropanethiol, methanethiol, methyl disulfide and methyl sulfide. The target compounds were
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
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
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
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
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
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
Pedro Landín et al.
Journal of AOAC International, 86(1), 44-49 (2003-02-28)
A rapid and simple method of using solid-phase microextraction was developed for determination of 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) in water samples. In this method, the target analyte is extracted from the sample into the polymeric coating of the fused-silica fiber. After exposure
M Mestres et al.
Journal of chromatography. A, 881(1-2), 583-590 (2000-07-25)
A method for analysing low-volatility sulphur compounds using solid-phase microextraction has been developed. The analytes were extracted directly from the liquid sample using fibres coated with different stationary phases. The best extraction efficiency was obtained with Carboxen-polydimethylsiloxane coating. Ionic strength
D A Cassada et al.
Analytical chemistry, 72(19), 4654-4658 (2000-10-12)
Solid-phase microextraction (SPME) and gas chromatography/mass spectrometry have been combined for trace-level determination of very polar compounds in water, including the widely used gasoline oxygenates ethanol and methyl tert-butyl ether (MTBE). A relatively simple extraction method using a divinylbenzene/Carboxen/poly(dimethylsiloxane) SPME
Delphine Bourdin et al.
Analytical and bioanalytical chemistry, 406(1), 317-328 (2013-11-21)
Solid-phase microextraction on-fiber derivatization applied to carbonyl compounds is known, but application to indoor air is poorly developed and the methods deserve to be complemented and optimized. In this work, two derivatization reagents, pentafluorophenylhydrazine and o-2,3,4,5,6-(pentaflurobenzyl)hydroxylamine (PFBHA), and three fiber
Elżbieta Dobrzyńska et al.
Journal of separation science, 36(20), 3372-3378 (2013-08-21)
A needle-trap device, with immobilized sorbent inside the syringe, coupled with GC-MS was applied for air sampling and determination of chlorinated volatile organic compounds such as dichloromethane, trichloromethane, and tetrachloromethane. The application of a needle trap packed with combination of
1/15