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Showing 31-60 of 2106 results for "504823" within Papers
Johannes Langen et al.
Analytical and bioanalytical chemistry, 408(23), 6483-6496 (2016-07-16)
Native concentrations of α-ionone, β-ionone, and β-damascenone were studied in various authentic and commercial wines. In addition, the enantiomeric distribution of α-ionone was determined and its merits as a potential marker for aroma adulteration in wine were discussed. For extraction of
Navideh Sadoughi et al.
Journal of agricultural and food chemistry, 63(11), 2877-2885 (2015-02-24)
An optimized method for the quantitation of volatile compounds responsible for off-aromas, such as earthy odors, found in wine and grapes was developed. The method involved a fast and simple headspace solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) for simultaneous determination of
Evangelia Yiantzi et al.
Analytica chimica acta, 927, 46-54 (2016-05-31)
The design and testing of a new and low-cost experimental setup used for vacuum-assisted headspace solid-phase microextraction (Vac-HSSPME) is reported here. The device consists of a specially designed O-ring seal screw cap offering gas-tight seal to commercially available headspace vials.
Mouna Ben Rached et al.
Journal of oleo science, 66(8), 907-915 (2017-07-14)
The aim of this study examined the characterization of extra virgin olive oil samples from the main cultivar Chemlali, grown in five olive orchards with different soil type (Sandy, Clay, Stony, Brown, Limestone and Gypsum). Volatile compounds were studied using
Igor Jerković et al.
Natural product communications, 10(2), 357-360 (2015-04-30)
Headspace solid-phase microextraction (HS-SPME), ultrasonic solvent extraction (USE) and solid phase extraction (SPE), followed by GC-FID/MS were used for screening of dandelion (Taraxacum officinale Weber) honey headspace, volatiles and semi-volatiles. The obtained results constitute a breakthrough towards screening of dandelion
Mohammad Saraji et al.
Journal of chromatography. A, 1460, 33-39 (2016-07-28)
In this paper, a mesoporous carbon-ZrO2 nanocomposite was fabricated on a stainless steel wire for the first time and used as the solid-phase microextraction coating. The fiber was synthesized with the direct carbonization of a Zr-based metal organic framework. With
Igor Jerković et al.
Chemistry & biodiversity, 13(2), 210-218 (2016-02-18)
Eight propolis samples from Croatia were analyzed in detail, to study the headspace, volatiles, anti-Varroa-treatment residue, phenolics, and antioxidant properties. The samples exhibited high qualitative/quantitative variability of the chemical profiles, total phenolic content (1,589.3-14,398.3 mg GAE (gallic acid equivalent)/l EtOH extract)
Masoud Ghader et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1083, 222-232 (2018-03-20)
Vaccine production is a biological process in which variation in time and output is inevitable. Thus, the application of Process Analytical Technologies (PAT) will be important in this regard. Headspace solid - phase microextraction (HS-SPME) coupled with GC-MS can be
Hester Peltenburg et al.
Journal of chromatography. A, 1447, 1-8 (2016-04-17)
The mixed-mode (C18/strong cation exchange-SCX) solid-phase microextraction (SPME) fiber has recently been shown to have increased sensitivity for ionic compounds compared to more conventional sampler coatings such as polyacrylate and polydimethylsiloxane (PDMS). However, data for structurally diverse compounds to this
Heike Gerhardt et al.
Journal of chemical ecology, 42(8), 725-738 (2016-07-06)
Spatially controlled in vivo sampling by contact solid phase microextraction with a non-coated silica fiber combined with gas chromatography-mass spectrometry (GC-MS) was utilized for hydrocarbon profiling in tarsal adhesion secretions of four insect species (Nicrophorus vespilloides, Nicrophorus nepalensis, Sagra femorata
Aníbal Valenzuela et al.
Talanta, 125, 196-203 (2014-05-21)
A new headspace solid-phase micro-extraction (HS-SPME) method followed by gas chromatography with pulsed flame photometric detection (GC-PFPD) analysis has been developed for the simultaneous determination of 11 organotin compounds, including methyl-, butyl-, phenyl- and octyltin derivates, in human urine. The
Zarrin Es'haghi et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 973C, 142-151 (2014-12-03)
Hollow fiber-solid phase micro-extraction (HF-SPME) technique containing sol-gel-derived Fe
Igor Jerković et al.
Molecules (Basel, Switzerland), 21(3), 377-377 (2016-03-24)
The samples of Satureja subspicata Vis. honey were confirmed to be unifloral by melissopalynological analysis with the characteristic pollen share from 36% to 71%. Bioprospecting of the samples was performed by HPLC-DAD, GC-FID/MS, and UV/VIS. Prephenate derivatives were shown to
J A Baz-Lomba et al.
Journal of chromatography. A, 1531, 32-38 (2017-11-29)
This article presents a novel approach for the analysis of 13 drugs in wastewater for use in wastewater-based epidemiology (WBE) studies. Sample preparation remains one of the principal bottlenecks in modern high-throughput analysis by ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS).
Cristina Bach et al.
Journal of chromatography. A, 1448, 98-106 (2016-04-30)
Here, we developed and validated a headspace-solid-phase microextraction-gas chromatography/mass spectrometry (HS-SPME-GC/MS) method for the determination of 14 volatile perfluorinated alkylated substances (PFASs) in water and sediment samples according to SANTE 11945/2015 guidelines. Three fluorotelomer alcohols (FTOHs), two perfluoroalkyl iodides (PFIs)
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
Khalil Farhadi et al.
Talanta, 128, 493-499 (2014-07-26)
This study presents a new technique, dispersive micro solid phase extraction (DMSPE) combined with headspace solid phase micro-extraction (HS-SPME) for extraction and determination of chlorophenols (CPs) in water and honey samples using a Gas Chromatography-Electron Capture Detector (GC-ECD). Zein nanoparticles
Mahmoud Heidari et al.
Analytica chimica acta, 918, 43-49 (2016-04-06)
In this paper solid phase microextraction (SPME) and needle trap device (NTD) as two in-progress air monitoring techniques was applied with silylated composite of carbon nanotubes for sampling and analysis of perchloroethylene in air. Application of SPME and NTD with
Federica Bianchi et al.
Journal of chromatography. A, 1102(1-2), 268-272 (2005-11-22)
An efficient and simple method for the determination of furan in baby-food (vegetables and fruits) by solid phase micro-extraction-gas chromatography-mass spectrometry (SPME-GC-MS) was developed and validated. Experimental design was used to investigate the effects of temperature and time of extraction.
Kristine Ann Gualberto Sotelo et al.
Molecules (Basel, Switzerland), 20(3), 5223-5238 (2015-03-26)
The aim of this research was to study the effect of pulsed electric fields (PEF) on the flavour profile of red-fleshed sweet cherries (Prunus avium variety Stella). The cherry samples were treated at a constant pulse frequency of 100 Hz
Helna C Passinho-Soares et al.
Molecules (Basel, Switzerland), 18(9), 10320-10333 (2013-09-26)
Plectranthus spp (Lamiaceae) are plants of economic importance because they are sources of aromatic essential oils and are also cultivated and several species of this genus are used as folk medicines. This paper describes the effects of different concentrations of
Mir Mahdi Abolghasemi et al.
Journal of separation science, 38(8), 1344-1350 (2015-01-30)
In this research, a carbon nanotube/layered double hydroxide nanocomposite was synthesized by an in situ growth route by electrostatic force. The prepared carbon nanotube/layered double hydroxide nanocomposite was successfully prepared and deposited on a stainless-steel wire for the fabrication of
Igor Jerković et al.
Molecules (Basel, Switzerland), 21(10) (2016-10-01)
Headspace solid-phase microextraction (HS-SPME) and ultrasonic solvent extraction (USE), followed by GC-MS/FID, were applied for monitoring the nectar (NE)/honey-sac (HoS)/honey (HO) pathways of the headspace, volatiles, and semi-volatiles. The major NE (4 varieties of
B Jaillais et al.
Talanta, 48(4), 747-753 (2008-10-31)
The advantages of combined cold-trapping of cheese volatiles and solid-phase microextraction-GC are demonstrated. This method is simple, cheap, compatible with classic identification equipment, and allows in-situ sampling.
Gerardo D Anaya-Eugenio et al.
Journal of ethnopharmacology, 179, 403-411 (2016-01-23)
Aerial parts of Artemisia ludoviciana are widely used in Mexico for treating gastrointestinal disorders, painful complaints and diabetes. To establish the preclinical efficacy as antinociceptive agent of the essential oil (EO) from the aerial parts of A. ludoviciana using well-known
Habib Bagheri et al.
Journal of separation science, 39(3), 576-583 (2015-11-29)
A high-throughput micro-solid-phase extraction device based on a 96-well plate was constructed and applied to the determination of pesticide residues in various apple samples. Butyl methacrylate and ethylene glycol dimethacrylate were copolymerized as a monolithic polymer and placed in the
Rosa Perestrelo et al.
Journal of food science and technology, 53(1), 132-144 (2016-01-21)
In this study an efficient and reliable method based on dynamic headspace solid-phase microextraction (HS-SPME) followed by gas chromatography-mass spectrometry (GC-qMS), was developed to establish the volatile metabolomic pattern of Thymus vulgaris L., Rosmarinus officinalis L. and Ruta chalepensis L.
Sara Zali et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1002, 387-393 (2015-09-13)
For the first time, electrospun polystyrene nanostructure was used as coating material on a stainless steel wire for solid-phase microextraction. Surface morphology of the coating was studied by scanning electron microscopy which showed the formation of nanofibers on the wire.
Gaalebalwe Ntlhokwe et al.
Analytical and bioanalytical chemistry, 409(17), 4127-4138 (2017-04-19)
The applicability of comprehensive two-dimensional gas chromatography (GC×GC) using a single-stage thermal modulator was explored for the analysis of honeybush tea (Cyclopia spp.) volatile compounds. Headspace solid phase micro-extraction (HS-SPME) was used in combination with GC×GC separation on a non-polar
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