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Showing 1-30 of 2076 results for "57319" within Papers
Idaira Pacheco-Fernández et al.
Talanta, 158, 125-133 (2016-06-28)
Several crosslinked polymeric ionic liquid (PIL)-based sorbent coatings of different nature were prepared by UV polymerization onto nitinol wires. They were evaluated in a direct-immersion solid-phase microextraction (DI-SPME) method in combination with high-performance liquid chromatography (HPLC) and diode array detection
Mohammad Saraji et al.
Journal of separation science, 39(18), 3616-3623 (2016-07-28)
We report on the fabrication of a thin-film composite for the extraction of bisphenol A from aqueous solutions. Nylon-6, C18 particles, and polyethylene glycol were used to prepare the thin film sorbent. Bisphenol A was used as a model compound
Die Gao et al.
Journal of agricultural and food chemistry, 65(6), 1158-1166 (2017-01-24)
A method based on molecularly imprinted solid-phase microextraction (MIP-SPME) coupled with liquid chromatography-quadrupole time-of-flight tandem mass spectrometry (QTOF-MS/MS) was developed for the detection of luteolin and its metabolites in vivo. The MIP-SPME fibers were first fabricated by dopamine and silane
Zohreh Rezaeifar et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1029-1030, 81-87 (2016-07-19)
A new design of hyperbranched polyglycerol/graphene oxide nanocomposite reinforced hollow fiber solid/liquid phase microextraction (HBP/GO -HF-SLPME) coupled with high performance liquid chromatography used for extraction and determination of ibuprofen and naproxen in hair and waste water samples. The graphene oxide
Na Rae Choi et al.
Talanta, 148, 69-74 (2015-12-15)
An analytical method was developed for the identification and quantification of seven volatile n-nitrosamines (n-nitrosodimethylamine [NDMA], n-nitrosoethylmethylamine [NMEA], n-nitrosodiethylamine [NDEA], n-nitrosodipropylamine [NDPA], n-nitrosodibutylamine [NDBA], n-nitrosopiperidine [NPIP], and n-nitrosopyrrolidine [NPYR]) in water insoluble cream type cosmetics. It was found that the
Jeehyun Lee et al.
Molecules (Basel, Switzerland), 18(8), 10024-10041 (2013-08-24)
This study identifies and semi-quantifies aroma volatiles in brewed green tea samples. The objectives of this study were to identify using a gas chromatograph-mass spectrometer (GC-MS) paired with a headspace solid-phase micro-extraction (HS-SPME) the common volatile compounds that may be
Hye-In Kang et al.
Journal of chromatography. A, 1448, 115-120 (2016-05-01)
A simple and convenient headspace solid-phase microextraction (HS-SPME) gas chromatography mass spectrometry (GC-MS) method was described for the determination of glutaraldehyde in water. Glutaraldehyde in water reacted with 2,2,2-trifluoroethylhydrazine (TFEH) in a headspace vial and the formed TFEH derivatives were
Jie Huang et al.
Journal of separation science, 39(22), 4384-4390 (2016-11-03)
In this work, a facile and environmentally friendly solid-phase microextraction assay based on on-fiber derivatization coupled with gas chromatography and mass spectrometry was developed for determining four nonvolatile index biogenic amines (putrescine, cadaverine, histamine, and tyramine) in fish samples. In
Shigehisa Uchiyama et al.
Environmental research, 137, 364-372 (2015-01-21)
A nationwide survey of indoor air quality in Japan was conducted using four types of diffusive samplers. Gaseous chemical compounds such as carbonyls, volatile organic compounds (VOC), acid gases, basic gases, and ozone were measured in indoor and outdoor air
Noorfatimah Yahaya et al.
Biomedical chromatography : BMC, 31(2) (2016-07-31)
A rapid dispersive micro-solid phase extraction (D-μ-SPE) combined with LC/MS/MS method was developed and validated for the determination of ketoconazole and voriconazole in human urine and plasma samples. Synthesized mesoporous silica MCM-41 was used as sorbent in d-μ-SPE of the
Paulo Cardoso et al.
Environmental pollution (Barking, Essex : 1987), 231(Pt 1), 802-811 (2017-09-03)
The volatile metabolome of Rhizobium sp. strain E20-8 exposed to three concentrations of cadmium (2.5, 5.0 and 7.5 μM) was screened using comprehensive two-dimensional gas chromatography coupled to time of flight mass spectrometry (GC × GC-ToFMS), combined with headspace solid phase microextraction (HS-SPME).
Lv Zhou et al.
Journal of the science of food and agriculture, 97(3), 761-769 (2016-05-12)
Head space solid-phase microextraction-gas chromatography-mass spectrometry has been applied to analyze the volatile components of six marine microalgae (Thalassiosira weissflogii, Nitzschia closterium, Chaetoceros calcitrans, Platymonas helgolandica, Nannochloropsis spp. and Dicrateria inornata) from Bacillariophyta, Chlorophyta and Chrysophyta, respectively, in different growth
Jihong Zhang et al.
Plant physiology and biochemistry : PPB, 126, 11-21 (2018-02-27)
Salinity stress can impede development and plant growth adversely. However, there is very little molecular information on NaCl resistance and volatile emissions in Lycopersicum esculentum. In order to investigate the effects of salt stress on the release of volatile compounds
Hiroyuki Kataoka et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1019, 140-146 (2015-09-10)
A simple and sensitive method for the determination of 8-hydroxy-2'-deoxyguanosine (8-OHdG), a marker of oxidative DNA damage in human urine, was developed using automated on-line in-tube solid-phase microextraction (SPME) coupled with stable isotope-dilution liquid chromatography-tandem mass spectrometry (LC-MS/MS). Creatinine was
Mieko Kanamori-Kataoka et al.
Journal of chromatography. A, 1410, 19-27 (2015-08-05)
To establish adequate on-site solvent trapping of volatile chemical warfare agents (CWAs) from air samples, we measured the breakthrough volumes of CWAs on three adsorbent resins by an elution technique using direct electron ionization mass spectrometry. The trapping characteristics of
Michiel T O Jonker
Environmental toxicology and chemistry, 35(6), 1371-1377 (2015-11-10)
Octanol-water partition coefficients (KOW ) are widely used in fate and effects modeling of chemicals. Still, high-quality experimental KOW data are scarce, in particular for very hydrophobic chemicals. This hampers reliable assessments of several fate and effect parameters and the
Svend Kamysek et al.
Analytical and bioanalytical chemistry, 401(7), 2093-2102 (2011-06-07)
Breath analysis could offer a non-invasive means of intravenous drug monitoring if robust correlations between drug concentrations in breath and blood can be established. In this study, propofol blood and breath concentrations were determined in an animal model under varying
An Adams et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 897, 37-41 (2012-05-01)
For the analysis of furan, a possible carcinogen formed during thermal treatment of food, Solid-Phase Microextraction (SPME) is a preferred and validated sampling method. However, when volatile furan precursors are adsorbed on the carboxen/PDMS fiber, additional amounts of furan can
Zhoubing Huang et al.
Talanta, 178, 629-635 (2017-11-16)
The introduction of functional groups into metal organic frameworks has great potential for enhancement in adsorption performance of nitrosamines using solid phase microextraction (SPME). However, pre-functionalization and post-modification generally suffer from the same limitation that the additional functional groups occupy
Jonathan J Grandy et al.
Analytical chemistry, 88(3), 1760-1767 (2015-12-19)
In this work, a durable and easy to handle thin film microextraction (TFME) device is reported. The membrane is comprised of poly(divinylbenzene) (DVB) resin particles suspended in a high-density polydimethylsiloxane (PDMS) glue, which is spread onto a carbon fiber mesh.
Xinjie Sun et al.
Journal of chromatographic science, 55(3), 366-372 (2016-12-03)
A new nanocomposite membrane was used to clean up impurities from complex samples and the obvious synergy was obtained in this paper. The nanocomposite membrane was prepared by dispersing TiO2 nanoparticles in chloroform and filled in the pores and lumen
Kristin Schallschmidt et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1006, 158-166 (2015-11-10)
Three strategies to sample volatile organic compounds (VOC) from lung cancer cell lines cultured in vitro were compared. Headspace solid phase microextraction was applied in situ to culture flasks and alternatively to subsamples of headspace gas or to nutrient solution
Jian Chen
Analytical chemistry, 89(16), 8366-8371 (2017-07-18)
Headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS) is commonly used in analyzing insect volatiles. To improve the detection of volatiles in insects, a freeze-thaw method was applied to insect samples before the HS-SPME-GC-MS analysis. Insect samples were
Behzad Heibati et al.
Ecotoxicology and environmental safety, 149, 19-25 (2017-11-18)
Elevated emissions of volatile organic compounds, including benzene, toluene, ethylbenzene, and o, p, and m-xylenes (BTEX), are an occupational health concern at oil transfer stations. This exploratory study investigated personal exposure to BTEX through environmental air and urine samples collected
M Abalos et al.
Journal of chromatography. A, 873(1), 107-115 (2000-04-11)
An analytical procedure based on headspace solid-phase microextraction (SPME) coupled to GC-flame ionization detection/Negative Chemical Ionization Mass Spectrometry has been developed for the determination of free volatile fatty acids (C2-C7) in waste water samples. Five different coatings have been evaluated
J S Elmore et al.
Advances in experimental medicine and biology, 488, 125-132 (2001-09-08)
Headspace solid phase microextraction (SPME), using a Carboxen-polydimethylsiloxane fiber, was compared with headspace entrainment on Tenax TA, as a means of examining the aroma constituents of cooked beef. Extracts were analyzed using gas chromatography-mass spectrometry. Headspace entrainment on Tenax extracted
Alfredo Díaz et al.
Journal of chromatography. A, 963(1-2), 159-167 (2002-08-22)
A direct solid-phase microextraction (SPME) procedure has been developed and applied for the simultaneous determination of nonylphenol, nonylphenol mono- and diethoxylates and their brominated derivatives in raw and treated water at low microg l(-1) concentrations. Several parameters affecting the SPME
Hironari Sakamoto et al.
Nihon eiseigaku zasshi. Japanese journal of hygiene, 70(3), 249-258 (2015-09-29)
Indoor air quality (IAQ) is a major concern, because people on average spend the vast majority of their time indoors and they are repeatedly exposed to indoor air pollutants. In this study, to assess indoor air quality in Chiba City
Zi-Wei Zhang et al.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 41(2), 285-293 (2016-01-01)
A headspace-solid phase microextraction-gas chromatography-mass spectrometry method(HS-SPME-GC-MS) was adopted for the quantitative study of 4-allylanisole, methyl eugenol, 2,3,5-trimethoxytoluene, 3,4,5-trimethoxytoluene, sarisan, 3,5-dimethoxytoluene and safrole in mice brain, liver tissues and blood after intragastric administration of Asari Radix et Rhizoma. A VF-WAXms
Initial study of three different pathogenic microorganisms by gas chromatography-mass spectrometry.
Najmeh Karami et al.
F1000Research, 6, 1415-1415 (2018-02-03)
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