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Showing 31-60 of 2106 results for "504823" within Papers
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
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
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
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
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
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
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
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
H M Al-Saidi et al.
Talanta, 159, 137-142 (2016-07-31)
A simple, low cost and efficient headspace sorptive solid phase microextraction (HS-SPME) method for determination of cyanide has been developed. The system comprises of a glass tube with two valves and a moveable glass slide fixed at its centre. It
Alan Willse et al.
Immunogenetics, 58(12), 967-982 (2006-11-08)
Genes of the major histocompatibility complex (MHC) influence the urinary odors of mice. Behavioral studies have shown (1) that mice differing only at MHC have distinct urinary odors, suggesting an MHC odor phenotype or odortype; (2) that the MHC odortype
Raíssa Bittar Mastello et al.
Food research international (Ottawa, Ont.), 75, 281-288 (2015-09-01)
Odour-active compounds present in pasteurised orange juice were identified by gas chromatography-olfactometry (GC-O) employing heart-cut multidimensional GC techniques with olfactometry (O) and mass spectrometry (H/C MDGC-O/MS) and comprehensive two-dimensional gas chromatography-accurate mass time-of-flight MS (GC×GC-accTOFMS). Headspace solid phase microextraction sampling
F L Cardinali et al.
Journal of chromatographic science, 38(2), 49-54 (2000-03-11)
The analysis of volatile organic compounds (VOCs) in whole human blood at the low parts-per-trillion level has until recently required the use of a high-resolution mass spectrometer to obtain the specificity and detection limits required for epidemiological studies of VOC
Amir Ben Mansour et al.
Journal of oleo science, 64(4), 381-392 (2015-04-04)
The chemical composition, oxidative stability, aroma and sensory profiles of virgin olive oils from two Tunisian cultivars, Chemlali and Neb Jmel, grown in two different locations, the center and south of Tunisia, have been evaluated. There were significant differences between
Corrigendum to "Gas chromatographic determination of polycyclic aromatic hydrocarbons in water and smoked rice samples after solid-phase microextraction using multiwalled carbon nanotube loaded hollow fiber" [J. Chromatogr. A 1374 (2014) 50-57].
Amir Abbas Matin et al.
Journal of chromatography. A, 1527, 105-105 (2017-11-06)
Jyisy Yang et al.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 18(11), 1247-1252 (2002-12-03)
An infrared reflection-absorption (IR/RA) method was developed to detect aromatic organic compounds in aqueous solutions where the required sample volume can be as low as 50 microL. Two aluminum plates were used to form the sampling cell for the detection
Mahdi Ghorbani et al.
Journal of separation science, 39(6), 1082-1089 (2016-03-31)
A simple, rapid, and sensitive method for the determination of naproxen and ibuprofen in complex biological and water matrices (cow milk, human urine, river, and well water samples) has been developed using ultrasound-assisted magnetic dispersive solid-phase microextraction. Magnetic ethylendiamine-functionalized graphene
Mingguang Ma et al.
Talanta, 167, 118-125 (2017-03-28)
A novel solid-phase microextraction (SPME) fiber was fabricated by direct electrodeposition of polyaniline (PANI) coated the titania nanotube arrays in situ grown on the titanium wire followed by carbonization at 500°C under nitrogen atmosphere. The resulting titanium-based fiber with nitrogen-enriched
Mei-Xia Guo et al.
Huan jing ke xue= Huanjing kexue, 34(8), 3244-3250 (2013-11-07)
In order to demonstrate the variation of bioaccessibility of PAHIs in microbial degradation process, PAH contaminated coking plant soil was remediated using microbial agent, and the bioaccessibility of PAHs was assessed using solid phase micro extraction (SPME) and solid phase
Allison M Curran et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 846(1-2), 86-97 (2006-10-03)
The composition of human scent collected from the hands is of interest to the medical community as a mechanism to diagnose disease and the forensic community as a means to investigate canine scent discriminations. An extensive survey of the volatile
Guoming Liu et al.
Food chemistry, 256, 268-279 (2018-04-03)
Based on single factor and orthogonal experiments, optimal fermentation conditions for longan wine were Saccharomyces cerevisiae strain of Lalvin K
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
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
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