MilliporeSigma
Search Within
Applied Filters:
Keyword:'57439-u'
Showing 1-30 of 2055 results for "

57439-u

" within Papers
Sort by Relevance
Adriana Neves Dias et al.
Analytica chimica acta, 888, 59-66 (2015-09-01)
This study describes the use of cork as a new coating for bar adsorptive microextraction (BAμE) and its application in determining benzophenone, triclocarban and parabens in aqueous samples by HPLC-DAD. In this study bars with 7.5 and 15 mm of
Chinthaka A Seneviratne et al.
Rapid communications in mass spectrometry : RCM, 30(1), 89-94 (2015-12-15)
Ambient mass spectrometry can detect small molecules directly, but complex mixtures can be a challenge. We have developed a method that incorporates small molecule separation based on laser desorption with capture on a solid-phase microextraction (SPME) fiber for injection into
Paweł Mochalski et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 959, 62-70 (2014-04-29)
Gas chromatography with mass spectrometric detection (GC-MS) coupled with solid phase micro-extraction as pre-concentration method (SPME) was applied to identify and quantify volatile organic compounds (VOCs) emitted by human skin. A total of 64 C4-C10 compounds were quantified in skin
Weiqian Liang et al.
Journal of chromatography. A, 1491, 9-15 (2017-02-27)
In this work, a barley husk biomaterial was successfully carbonized by hydrothermal method. The carbon had a high specific surface area and good stability. It was coated onto a stainless steel wire through sol-gel technique to prepare a solid-phase microextraction
Karolin Axelsson et al.
Microbial ecology, 74(1), 177-184 (2017-01-12)
The pine weevil, Hylobius abietis, is a severe forest pest insect as it feeds on newly planted conifer seedlings. To identify and develop an antifeedant could be one step towards the protection of seedlings from feeding damage by the pine
Tatjana Abaffy et al.
PloS one, 5(11), e13813-e13813 (2010-11-17)
Early detection of melanoma is of great importance to reduce mortality. Discovering new melanoma biomarkers would improve early detection and diagnosis. Here, we present a novel approach to detect volatile compounds from skin. We used Head Space Solid Phase Micro-Extraction
Krzysztof Goryński et al.
Journal of pharmaceutical and biomedical analysis, 130, 55-67 (2016-05-29)
Solid phase microextraction (SPME) is a technology where a small amount of an extracting phase dispersed on a solid support is exposed to the sample for a well-defined period of time. The open-bed geometry and biocompatibility of the materials used
R A González-Fuenzalida et al.
Journal of chromatography. A, 1432, 17-25 (2016-01-23)
Following the present trends in miniaturization, a methodology that combines on-line In-Tube Solid-Phase Microextraction (IT-SPME) with Liquid Nanochromatography (nano-LC) and UV-vis diode array detection (DAD) was developed. This coupling was achieved by using two interconnected valves (i.e. conventional and micro-automatic
Pawina Salisaeng et al.
Journal of agricultural and food chemistry, 64(10), 2145-2152 (2016-02-27)
A vortex-assisted dispersive micro-solid phase extraction (VA-D-μ-SPE) based on cetyltrimethylammonium bromide (CTAB)-modified zeolite NaY was developed for preconcentration of carbamate pesticides in fruits, vegetables, and natural surface water prior to analysis by high performance liquid chromatography with photodiode array detection.
William D Kranz et al.
Analytical and bioanalytical chemistry, 406(30), 7817-7825 (2014-11-27)
Genuine explosive materials are traditionally employed in the training and testing of explosive-detecting canines so that they will respond reliably to these substances. However, challenges arising from the acquisition, storage, handling, and transportation of explosives have given rise to the
Rosa Perestrelo et al.
Talanta, 144, 382-389 (2015-10-11)
Leukotriene B4 (LTB4) is a potent mediator of inflammation and plays a key function in the pathophysiology of chronic asthma. Detectable urinary levels of LTB4, arises from the activation of leukotriene pathways. In this study an ultra-fast, selective and sensitive
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)
Maria Celeiro et al.
Chemosphere, 195, 201-211 (2017-12-22)
Due to the high concern generated in the last years about the safety of recycled tire rubber used for recreational sports surfaces, this study aims at evaluating the presence of forty organic compounds including polycyclic aromatic hydrocarbons (PAHs), phthalates, adipates
Nor H Kamarulzaman et al.
Talanta, 191, 535-544 (2018-09-29)
Different extraction procedures were evaluated to assess their potential for measuring volatile organic compounds (VOCs) from raw rubber materials. Four headspace sampling techniques (SHS, DHS, HS-SPME and µ-CTE) were studied. Each method was firstly optimised to ensure their reliability in
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
Hatam Amanzadeh et al.
Analytica chimica acta, 884, 52-60 (2015-06-16)
In this work, ZnO/PPy nanocomposite coating was fabricated on stainless steel and evaluated as a novel headspace solid phase microextraction (HS-SPME) fiber coating for extraction of ultra-trace amounts of environmental pollutants; namely, aliphatic hydrocarbons in water and soil samples. The
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).
Feng Yao et al.
Scientific reports, 5, 9553-9553 (2015-04-11)
Luzhoulaojiao liquor is a type of Chinese liquor that dates back hundreds of years, but whose precise chemical composition remains unknown. This paper describes the screening of the liquor and the identification of its compounds using comprehensive two-dimensional gas chromatography/time-of-flight
Renier Felinto Julião da Rocha et al.
Journal of food science and technology, 54(12), 4042-4050 (2017-11-01)
Optimization of the extraction conditions to investigate the volatile composition of papaya fruit involving headspace solid phase micro-extraction was carried out using multivariate strategies such as factorial design and response surface methodology. The performance of different combinations of time for
Joana Pinto et al.
Food chemistry, 257, 120-127 (2018-04-07)
The oxidation of oaked Chardonnay wine during long-term storage was studied by headspace solid-phase microextraction coupled to gas chromatography-mass spectrometry (HS-SPME-GC/MS) and proton (
Shihua Yu et al.
The Analyst, 143(4), 883-890 (2018-01-19)
Surface enhanced Raman scattering (SERS) is an ultra-sensitive spectroscopy technique, which can provide rich structural information for a great number of molecules, while solid phase micro-extraction (SPME) is an efficient method for sample pretreatment in analytical chemistry, particularly in a
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
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)
Maryam Shamsayei et al.
Journal of chromatography. A, 1475, 8-17 (2016-11-12)
In this work, a novel polythiophene/graphene oxide (PTh/GO) nanostructured coating was introduced for on-line electrochemically-controlled in-tube solid phase microextraction of amitriptyline (AMI) and doxepin (DOX) as antidepressant drugs. The PTh/GO coating was prepared on the inner surface of a stainless
Hye-Seung Jeong et al.
Toxicological research, 31(3), 273-278 (2015-10-21)
The aim of this study was to develop an efficient quantitative method for the determination of acetaldehyde (AA) and formaldehyde (FA) contents in solid and liquid food matrices. The determination of those compounds was validated and performed using gas chromatography-mass
William Kranz et al.
Insects, 8(2) (2017-04-12)
Alternative methods for the identification of species of blow fly pupae have been developed over the years that consist of the analyses of chemical profiles. However, the effect of biotic and abiotic factors that could influence the predictive manner for
Page 1 of 69
Page 1 of 69