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Showing 1-30 of 2059 results for "57321-U" 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
Matyas Ripszam et al.
Environmental toxicology and chemistry, 34(2), 266-274 (2014-11-14)
Dissolved organic carbon (DOC) plays a key role in determining the environmental fate of semivolatile organic environmental contaminants. The goal of the present study was to develop a method using commercially available hardware to rapidly characterize the sorption properties of
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
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
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
Qingxiang Zhou et al.
Analytica chimica acta, 869, 43-49 (2015-03-31)
Graphene is a good adsorbent for organic pollutants, especially for compounds containing benzene rings. When used in TiO2 nanotube arrays for micro-solid phase extraction (μ-SPE), the combination of graphene's strong adsorptive properties with its good separation capabilities results in excellent
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
Meike Paschke et al.
Archives of toxicology, 89(8), 1241-1255 (2015-07-04)
With the revision of the European Tobacco Products Directive (2014/40/EU), characterizing flavors such as strawberry, candy, vanillin or chocolate will be prohibited in cigarettes and fine-cut tobacco. Product surveillance will therefore require analytical means to define and subsequently detect selected
Anongphan Junkuy et al.
Journal of the Medical Association of Thailand = Chotmaihet thangphaet, 97(7), 776-784 (2014-10-01)
Three diagnostic methods have dominated drug-abuse research: self-report, urinalysis and hair analysis. Previous studies have compared detection rates for various drugs, but none has focused a three-pronged concordance study on the use of methamphetamine (MA). To determine and compare the
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
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)
Aleksandra Bojke et al.
Microbiological research, 214, 129-136 (2018-07-23)
Entomopathogenic fungi are fungal species which are used as a potential source of biopesticides. These fungi produce secondary metabolites which in insects can cause disruption in the normal functioning of their bodies, disease or even death. In order to fully
Simone B Soso et al.
Scientific reports, 7(1), 5137-5137 (2017-07-13)
Lions (Panthera leo) use chemical signaling to indicate health, reproductive status, and territorial ownership. To date, no study has reported on both scent and composition of marking fluid (MF) from P. leo. The objectives of this study were to: 1)
Piotr M Kuś et al.
Food research international (Ottawa, Ont.), 106, 243-253 (2018-03-28)
Phacelia tanacetifolia Benth. honey (14 samples) collected in Poland was characterized by melissopalynological analysis, color determination (CIE L*a*b*C
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