Detection of Beta-Blockers in Urine and Serum by Solid-Phase Extraction-Supercritical Fluid Extraction and Gas Chromatography-Mass Spectrometry
Time of Update: 2021-03-05
Beta-blockers have some clinical use in the treatment of angina pectoris, hypertension, and tachycardia. In addition, they have been used to control migraine, chronic alcoholism, schizophrenia, essential tremor, and cardiac effects
Measurement of Nitric Oxide Synthase Activity In Vivo and In Vitro by Gas Chromatography-Mass Spectrometry
Time of Update: 2021-03-02
Thus, the GC-MS nitrite/nitrate assay provides information about biologically relevant NOS activity.
Detection of Docosahexaenoic Acid Hydroperoxides in Retina by Gas Chromatography/Mass Spectrometry
Time of Update: 2021-03-01
In the retina, as well as in other organs, inflammation-mediated membrane lipid peroxidation is regarded as the major source of unsaturated fatty acid hydroperoxides.
High-temperature gas chromatography and gas chromatography-mass spectrometry of glycoprotein and glycosphingolipid oligosaccharides
Time of Update: 2021-02-27
High-temperature gas chromatography and gas chromatography-inass spectrometry for the analyses of oligosaccharides derived from glycoproteins or glycosphingolipids has been developed. Pcrmethylatcd oligosaccharides with up to about 12 sugar residues and masses up to 2500 Daltons can be analyzed. This approach is discussed and exemplified.
Analysis of Volatile Compounds Emitted by Filamentous Fungi Using Solid-Phase Microextraction-Gas Chromatography/Mass Spectrometry
Time of Update: 2021-02-13
Here, we describe a solid-phase microextraction-gas chromatography/mass spectrometry (SPME-GC/MS) analytical approach that identifies and analyzes volatile compounds in the headspace above a live fungal culture.
Automated Headspace Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry
Time of Update: 2021-02-12
The method for the determination of multiclass pesticides in water samples by headspace solid-phase microextraction and gas chromatography-mass spectrometry (HS-SPME-GC-MS) is described.
Analysis of Endocrine Disruptor Pesticides in Adipose Tissue Using Gas Chromatography-Tandem Mass Spectrometry: Assessment of the Uncertainty of the Method
Time of Update: 2021-02-01
The results show that the sources of largest uncertainty are those relative to the balance calibration, from the gravimetric step, and both the relative uncertainty associated with the recovery and the intermediate precision of the method.
Using Isotope Dilution Gas Chromatography-High-Resolution Mass Spectrometry
Time of Update: 2021-01-30
We propose a sensitive and accurate analytical method for quantifying 29 current-use pesticides in human serum or plasma.
Analysis of Pentachlorophenol and Other Chlorinated Phenols in Biological Samples by Gas Chromatography or Liquid Chromatography-Mass Spectrometry
Time of Update: 2021-01-26
Gas chromatographic (GC) and liquid chromatographic (LC)-mass spectrometric (MS) methods have been described to analyze pentachlorophenol and other chlorinated phenols in biological samples.
Gas Chromatography-High-Resolution Mass Spectrometry-Based Method for the Simultaneous Determination of Organotin Compounds in Water
Time of Update: 2021-01-25
A gas chromatography-high-resolution mass spectrometry (GC-HRMS)-based method has been developed for the accurate and sensitive determination of nine organotin compounds in water: tetrabutyltin, tributyltin, dibutyltin, monobutyltin, triphenyltin, diphenyltin, monophenyltin, tricyclohexyltin, and dicyclohexyltin.
Measurement of -Tocopherol Turnover in Plasma and in Lipoproteins Using Stable Isotopes and Gas Chromatography/Mass Spectrometry
Time of Update: 2021-01-05
metabolite measured in plasma or tissue at a given time can be used as an indicator of the status of that pool, the true biological activity of molecules is better represented by their turnover. The use of stable isotopes in biological research has expanded
Gas Chromatography-Mass Spectrometry
Time of Update: 2020-12-30
GC-MS is a very powerful technique for analysis with specificity of hormones in biological fluids.
The capillary column gas chromatography measures benzene in water-based epoxy coatings
Time of Update: 2020-12-29
of the relative correction factor of 2.2.2 toluene was called 0.0206g, 0.0220g, 0.0217g, and the mass of the internal object was 0.0219g, 0.0205g, 0.0217g, and the peak area of benzene was measured.
Analysis of F2-Isoprostanes by Gas Chromatography-Mass Spectrometry/Negative Ion Chemical Ionization
Time of Update: 2020-12-24
Thus, it has long been recognized that there has been a need for a reliable method to assess oxidative stress status in vivo in humans.
Analysis of Glycolytic Intermediates with Ion Chromatography- and Gas Chromatography-Mass Spectrometry
Time of Update: 2020-12-20
In the next step, a silylation withN -methyl- N -trimethylsilyltrifluoroacetamide (MSTFA) is performed, giving TMS-MOX derivatives of the glycolytic intermediates.
CLIN CHEM LAB MED: High-efficiency liquid chromatography-series mass spectrometry to simultaneously
Time of Update: 2020-12-11
this study describes the effectiveness of liquid chromatography series mass spectrometry (LC-MS/MS) for simultaneous determination of HCQ and its two main metabolites, deethyl chloroquine (DCQ) and DDDCQ.
Study on gas chromatography-mass spectrometrometrography for VOC, water-based coatings
Time of Update: 2020-12-10
From the experimental results, stirring extraction method is more likely to obtain high VOC recovery rate than ultrasonic extraction method, i.e. with higher extraction efficiency.
Gas chromatography determines VOC in water-based coatings
Time of Update: 2020-12-09
0 With the increasing attention paid to the quality of indoor environmental protection, the content of volatile organic compounds (VOCs) in water-based coatings, an interior decoration material, has received widespread attention. Although
Gas chromatography - Mass spectrometrometration determines the content of triclosene in solvent-based coatings
Time of Update: 2020-12-05
triclosene, added a certain concentration of triclosene standard substances, according to the established method of application of GC-MS analysis, calculate the recovery rate. 2. 4. 1 Sample plus standard solution preparation added 0.1
Analysis of the Citric Acid Cycle Intermediates Using Gas Chromatography-Mass Spectrometry
Time of Update: 2020-12-05
Researchers view analysis of the citric acid cycle (CAC) intermediates as a metabolomic approach to identifying unexpected correlations between apparently related and unrelated pathways of metabolism.