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57353

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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
Keith A Maruya et al.
Chemosphere, 137, 192-197 (2015-08-08)
The elevated occurrence of hydrophobic organic chemicals (HOCs) such as polycyclic aromatic hydrocarbons (PAH), polychlorinated biphenyls (PCBs) and legacy organchlorine pesticides (e.g. chlordane and DDT) in estuarine sediments continues to poses challenges for maintaining the health of aquatic ecosystems. Current
A Gierak et al.
Talanta, 69(5), 1079-1087 (2008-10-31)
The conditions of preparation of new types of carbon fibers for solid phase micro extraction (SPME) prepared by methylene chloride pyrolysis (at 600 degrees C) on the quartz fiber (100 microm) as well as by supporting synthetic active carbon (prepared
Seta Noventa et al.
Analytica chimica acta, 858, 66-73 (2015-01-20)
This work validated an automated, fast, and low solvent- consuming methodology suited for routine analysis of tributyltin (TBT) and degradation products (dibutyltin, DBT; monobutyltin, MBT) in biota samples. The method was based on the headspace solid-phase microextraction methodology (HS-SPME), coupled
Qinqin Chen et al.
Food research international (Ottawa, Ont.), 105, 605-615 (2018-02-13)
Volatile profile of ten different varieties of fresh jujubes was characterized by HS-SPME/GC-MS (headspace solid phase micro-extraction combined with gas chromatography-mass spectrometry) and E-nose (electronic nose). GC-MS results showed that a total of 51 aroma compounds were identified in jujubes
Marcos Bouza et al.
Journal of mass spectrometry : JMS, 52(9), 561-570 (2017-06-14)
Pulsed glow discharge (PGD) coupled to time of flight mass spectrometry (TOFMS) has been investigated for volatile organic compound (VOC) identification and determination. Optimization of PGD operational conditions (chamber design, applied power, pressure and duty cycle) was performed using acetone
Lauren E Musumeci et al.
Molecules (Basel, Switzerland), 20(7), 12280-12299 (2015-07-15)
Analyses of key odorous polyfunctional volatile thiols in wines (3-mercaptohexanol (3-MH), 3-mercaptohexylacetate (3-MHA), and 4-mercapto-4-methyl-2-pentanone (4-MMP)) are challenging due to their high reactivity and ultra-trace concentrations, especially when using conventional gas-chromatography electron impact mass spectrometry (GC-EI-MS). We describe a method
Laura Pistelli et al.
Acta biochimica Polonica, 60(1), 43-50 (2013-02-27)
Aromatic plant species present in the natural Park of Tuscany Archipelago are used as flavoring agents and spices, as dietary supplements and in cosmetics and aromatherapy. The plants are usually collected from wild stands, inducing a depletion of the natural
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
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
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
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
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
Pallavi Mohekar et al.
Journal of agricultural and food chemistry, 65(4), 872-878 (2017-01-10)
Brown marmorated stink bugs (BMSB) release stress compounds, tridecane and (E)-2-decenal, that affect final wine quality. This study focuses on determining the effect of wine processing on (E)-2-decenal and tridecane release in both red and white wines. Wines were produced
Inmaculada Talaverano et al.
Journal of the science of food and agriculture, 98(3), 1140-1152 (2017-08-02)
Controlled water deficits affect grape berry physiology and the resulting wines, with volatile composition being the one of the affected parameters. However, there is a potential disconnect between aromatic maturity and sugar accumulation. Accordingly, the effects of three different water
Mohammad Karimi et al.
Bulletin of environmental contamination and toxicology, 90(3), 291-295 (2012-11-28)
A gold nanoparticles modified fused silica fiber was developed and used for the head space solid phase micro-extraction (HS-SPME) of polycyclic aromatic hydrocarbons (PAHs), including naphthalene, anthracene, acenaphthylene, phenanthrene, fluoranthene and pyrene. The effects of different parameters influencing the extraction
Riccardo Romoli et al.
Journal of mass spectrometry : JMS, 46(10), 1051-1059 (2011-10-21)
Bacteria belonging to the Burkholderia cepacia complex (Bcc) are significant pathogens in Cystic Fibrosis (CF) patients and are resistant to a plethora of antibiotics. In this context, microorganisms from Antarctica are interesting because they produce antimicrobial compounds inhibiting the growth
Lukman Bola Abdulrauf et al.
Journal of AOAC International (2016-10-05)
This review presents the application of carbon nanotubes as sorbent materials in the analysis of pesticide residues in fruits and vegetables. The advantages, limitations, and challenges of carbon nanotubes, with respect to their use in analytical chemistry, are presented. The
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.
Laura Colombaioni et al.
PloS one, 12(11), e0188351-e0188351 (2017-11-22)
Lactate and ethanol (EtOH) were determined in cell culture medium (CCM) of immortalized hippocampal neurons (HN9.10e cell line) before and after incubation with Thallium (Tl). This cell line is a reliable, in vitro model of one of the most vulnerable
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
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
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
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
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
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
C van Netten et al.
The Science of the total environment, 263(1-3), 155-160 (2001-02-24)
Foray 48B, an insecticide prepared from Bacillus thuringiensis var. kurstaki (Btk), has been used for many years to combat infestations of Gypsy moths. Foray 48B also contains a large number of 'inert ingredients' which are not disclosed by the manufacturer.
Robert M Burgess et al.
Environmental toxicology and chemistry, 34(8), 1720-1733 (2015-06-04)
Currently, there is an effort under way to encourage remedial project managers at contaminated sites to use passive sampling to collect freely dissolved concentrations (Cfree ) of hydrophobic organic contaminants to improve site assessments. The objective of the present study
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