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Showing 1-30 of 2086 results for "57345-U" within Papers
Jiabin Wang et al.
Journal of chromatography. A, 1485, 24-31 (2017-01-18)
A novel urea-formaldehyde (UF) monolithic column has been developed and exploited as a sorbent for hydrophilic in-tube solid-phase microextraction (in-tube SPME) of aminoglycosides (AGs). Because of the innate hydrophilicity, UF monolith showed high extraction efficiency towards these hydrophilic analytes. The
Helen L Bridle et al.
Nature protocols, 11(8), 1328-1344 (2016-07-01)
Aqueous micropollutants such as estradiol can have a large environmental impact-even at low concentrations. Part of understanding this impact involves determining the extent to which the micropollutants interact with macromolecules in water. In environmental samples, relevant macromolecules to which micropollutants
A B Kanu et al.
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 58(2), 193-200 (2003-02-08)
A method compatible with radioactive samples, capable of detecting trace volatile components in a sample volume of ca. 1cm(3) of 2-[18F]-fluoro-2-deoxy-D-glucose solution is described. The approach, based on solid phase micro-extraction gas chromatography-mass spectrometry with a carboxen/polydimethylsiloxane based fibre, was
F Calliauw et al.
Journal of applied microbiology, 120(5), 1302-1312 (2016-02-26)
During a previous study concerning brown shrimp (Crangon crangon), selective streptomycin thallous acetate actidione (STAA) agar was used to determine the growth of Brochothrix thermosphacta. However, the growth of Vagococcus salmoninarum on this medium was also noticed. This study explores
M J Huang et al.
Se pu = Chinese journal of chromatography, 19(4), 314-318 (2003-01-28)
Solid phase micro-extraction (SPME) is a simple and effective sample preparation technique and fiber coatings play a very important role in SPME process. The discussion begins with a brief historical perspective from the very early work conducted almost a decade
M Soubhi Altaki et al.
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment, 34(5), 728-739 (2017-01-10)
The occurrence of furan in commercial baby food samples from the Spanish market was evaluated using an automated headspace solid-phase microextraction method coupled to gas chromatography-mass spectrometry (HS-SPME-GC-MS). A total of 76 baby food samples including infant formula, baby cereals
Sandrine Aguerre et al.
Analytical and bioanalytical chemistry, 376(2), 226-235 (2003-04-19)
The coupling between gas chromatography (GC) and inductively coupled plasma-atomic emission spectrometry (ICP-AES) has been optimised using experimental designs. Four factors were considered in order to assist the crucial part of the coupling which is the analytes passing through the
Adam L Lubrano et al.
Journal of chromatography. A, 1429, 8-12 (2016-01-01)
A novel analytical method has been developed for the quantitation of trace levels of ammonia in the headspace of ammonium nitrate (AN) using derivatized solid phase microextraction (SPME) fibers with gas chromatography mass spectrometry (GC-MS). Ammonia is difficult to detect
G Romanik et al.
Journal of biochemical and biophysical methods, 70(2), 253-261 (2006-11-28)
This paper discusses preparation techniques of samples of plant material for chromatographic analysis. Individual steps of the procedures used in sample preparation, including sample collection from the environment or from tissue cultures, drying, comminution, homogenization, leaching, extraction, distillation and condensation
Xiuyan Yang et al.
Journal of chromatography. A, 1414, 31-40 (2015-10-13)
Aerial emissions of odorous volatile organic compounds (VOCs) are an important nuisance factor from livestock production systems. Reliable air sampling and analysis methods are needed to develop and test odor mitigation technologies. Quantification of VOCs responsible for livestock odor remains
Elahe Kazemi et al.
Analytica chimica acta, 905, 85-92 (2016-01-13)
This study aims at developing a novel, sensitive, fast, simple and convenient method for separation and preconcentration of trace amounts of fluoxetine before its spectrophotometric determination. The method is based on combination of magnetic mixed hemimicelles solid phase extraction and
Giovannella Pecoraino et al.
Water research, 42(14), 3563-3577 (2008-08-16)
This work presents the results of an assessment of the existence and concentration of 13 volatile organic compounds (VOCs) in groundwaters from 14 hydrological basins in Sicily (25,710km (2)). On the basis of hydrological, hydrogeochemical and geological studies, 324 sampling
Sara Triñanes et al.
Talanta, 132, 433-442 (2014-12-06)
A new straightforward and inexpensive sample screening method for both EPA and EU priority polycyclic aromatic hydrocarbons (PAHs) in water has been developed. The method is based on combined direct immersion and headspace (DIHS) sorptive extraction, using low-cost disposable material
Rocio Aranda-Rodriguez et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 992, 76-85 (2015-05-13)
Humans are continuously exposed to volatile organic compounds (VOCs) as these chemicals are ubiquitously present in most indoor and outdoor environments. In order to assess recent exposure to VOCs for population-based studies, VOCs are measured in the blood of participants.
Kai Yao et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1003, 67-73 (2015-09-29)
A sensitive, selective and reproducible immunoaffinity stir bar sorptive microextraction (SBSME) coupled with liquid chromatography-fluorescence method for determination of 11 quinolones (QNs) in bovine milk was developed and validated. It is first report of a broad-specificity monoclonal antibody to QNs
Anna Petruczynik et al.
Acta poloniae pharmaceutica, 74(2), 331-346 (2018-04-07)
The review of the RP HPLC analysis of basic psychotropic drugs is presented. It contains sample preparation methods with centrifugation, protein precipitation, liquid-liquid extraction (LLE), dispersive liquid-liquid microextraction (DLLME), solid-phase extraction (SPE), solid-phase microextraction (SPME), microwave-assisted extraction (MAE) and RP-HPLC
R L Adams et al.
Journal of agricultural and food chemistry, 49(9), 4333-4336 (2001-09-18)
The irreversible binding of selected sulfur-containing flavor compounds to proteins was investigated in aqueous solutions containing ovalbumin and a mixture of disulfides (diethyl, dipropyl, dibutyl, diallyl, and 2-furfuryl methyl) using solid-phase micro-extraction (SPME). In systems which had not been heated
Liu Yang et al.
Journal of separation science, 39(8), 1518-1523 (2016-02-24)
Microextraction by packed sorbent, a miniaturized form of the solid-phase extraction, is a new sample pretreatment technology mainly used for bioanalysis. In this work, self-made device was fabricated by packing C18 sorbent into a microinjection needle (50 μL) and then
Corrigendum to "Environmental monitoring of complex hydrocarbon mixtures in water and soil samples after solid phase microextraction using PVC/MWCNTs nanocomposite fiber" [Chemosphere 93 (9) (November 2013) 1920-1926].
Amir Abbas Matin et al.
Chemosphere, 191, 1065-1065 (2017-11-09)
Hyun-Hee Lim et al.
Analytica chimica acta, 741, 32-37 (2012-07-31)
A robotic method has been established for the determination of bromate in sea water and drinking deep-sea water. Bromate in water was converted into volatile derivative, which was measured with headspace solid-phase micro extraction and gas chromatography-mass spectrometry (HS-SPME GC-MS).
Tamires Amabile Valim Brigante et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1067, 25-33 (2017-10-07)
Molecularly imprinted polymers (MIPs) were synthesized and used as sorbent for Bisphenol A (BPA) pipette tip solid-phase microextraction from urine samples and BPA analysis by gas chromatography coupled to mass spectrometry (GC-MS). The MIPs were synthesized by the sol-gel methodology.
N Martínez-Onandi et al.
Meat science, 122, 101-108 (2016-08-16)
One hundred and three volatile compounds were detected by solid-phase microextraction followed by gas chromatography-mass spectrometry in 30 ripened Serrano dry-cured hams, submitted or not to high pressure processing (HPP) and afterwards held for 5months at 4°C. The effect of
Attilio Naccarato et al.
Food chemistry, 206, 67-73 (2016-04-05)
This work proposes the novel PDMS/DVB/PDMS fiber as a greener strategy for analysis by direct immersion solid phase microextraction (SPME) in vegetables. SPME is an established sample preparation approach that has not yet been adequately explored for food analysis in
Mansoureh Behzadi et al.
Journal of chromatography. A, 1443, 35-42 (2016-04-02)
A poly(o-anisidine)/graphene oxide nanosheets (PoA/GONSs) coating is fabricated by a simple and efficient electrochemical deposition method on steel wire. The incorporation of PoA and GONSs allows preparing a nanocomposite that can successfully integrate the advantages of both. Then, the prepared
Sonia Bahrani et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1067, 45-52 (2017-10-11)
In present work, facile method is developed for determination of colchicine in human plasma sample, autumn and spring root of colchicium extracts by ultrasound assisted dispersive magnetic solid phase microextraction followed by HPLC-UV method (UAD-MSPME-HPLC-UV). Magnetic (Fe
Liliana Cano-García et al.
Food chemistry, 151, 364-373 (2014-01-16)
The ability of seven Debaryomyces hansenii strains to generate aroma compounds in a fermented sausage model system was evaluated. The presence of the yeast, in the inoculated models, was confirmed by PCR amplification of M13 minisatellite. Volatile compounds production was
Cátia Martins et al.
Journal of separation science, 40(10), 2228-2237 (2017-03-28)
Saccharomyces spp. are widely used in the food and beverages industries. Their cellular excreted metabolites are important for general quality of products and can contribute to product differentiation. This exploratory study presents a metabolomics strategy for the comprehensive mapping of
Tanzeela Khalid et al.
PloS one, 10(11), e0143283-e0143283 (2015-11-26)
The aim of this work was to investigate volatile organic compounds (VOCs) emanating from urine samples to determine whether they can be used to classify samples into those from prostate cancer and non-cancer groups. Participants were men referred for a
Yijia Tang et al.
Talanta, 175, 550-556 (2017-08-27)
Fluoroquinolones (FQs) are a group of antimicrobial agents that have been widely used for therapeutic purposes in clinical medicine for human and veterinary diseases, as well as in aquaculture production. Their residues, however, may survive in foods of animal origin
Xiu-Ping He et al.
Journal of chromatography. A, 1469, 8-16 (2016-10-01)
Highly selective and efficient magnetic molecularly imprinted polymers (MMIPs) were prepared using Fe
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