GC/MS (Gas Chromatography/Mass Spectrometry)
Gas chromatography-mass spectrometry analysis
... using GC-MS ...respectively. GC-MS analysis of the methanol extract showed the presence of naphth [2,3-B] azet-2 (1H) -one, 1- phenyl –, which was the characteristic compound showing the ...
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Application of gas chromatography-mass spectrometry for targeted and non-targeted analysis in toxic and edible mushrooms
... two GC-MS methodologies were applied in the chemical analysis of 22 mushrooms species (12 edible, 3 toxic and 7 possibly ...resulting GC-MS data was also submitted to non-targeted analysis ...
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Development of headspace solid-phase microextraction-gas chromatography–mass spectrometry methodology for analysis of terpenoids in Madeira wines
... The quantification method used calibration curves obtained from standards extracted in the same experimental conditions as the samples, in order to account for the different extrac- tion yields. The headspace method, in ...
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Analysis of organochlorine pesticides in water using headspace solid phase microextraction with gas chromatography and mass spectrometry.
... O método HS-SPME/GC-MS/MS desenvolvido neste trabalho para determinação de 18 pesticidas organoclorados em água apresentou boa seletividade, linearidade, sensibilidade, precisão e exatidão adequadas ...
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Validation of biomarkers for distinguishing Mycobacterium tuberculosis from non-tuberculous mycobacteria using gas chromatography-mass spectrometry and chemometrics.
... Conventional methods for the differentiation of MTB from NTM still suffer from the limitations of speed, sensitivity and specificity. Our fully automated THM-GC-MS approach with the 20-compound model is a ...
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Applying pyrolysis-gas chromatography/mass spectrometry to the identification of oriental lacquers: study of two lacquered shields
... The potential to analyse non-volatile and insoluble complex materials, and the small quantity of sample required makes it very attractive in the cultural heritage field and has been widely applied to the characterization ...
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Evaluation of beer deterioration by gas chromatography–mass spectrometry/multivariate analysis: a rapid tool for assessing beer composition
... conventional GC runs and, although some loss of resolution was detected, equivalent com- positional information was observed for both rapid and the conventional GC–MS ...subsequent ...
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IDENTIFICATION OF ORGANIC COMPOUNDS IN A MUNICIPAL LANDFILL LEACHATE BY GAS CHROMATOGRAPHY COUPLED WITH MASS SPECTROMETRY.
... de GC-MS empregado foram identificados vários compostos orgânicos, sendo alguns deles considerados prejudiciais ao ambiente e à saúde humana, como o bisfenol-A, 4-metil fenol, atrazina e hexazinona, o que ...
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Estimation of D-Arabinose by Gas Chromatography/Mass Spectrometry as Surrogate for Mycobacterial Lipoarabinomannan in Human Urine.
... We suspected that D-arabinose, a rare pentose in eukaryotes, is found in urine as neutral polysaccharide(s) such as hemicellulose, pectins and/or arabinoxylans originating from every- day food and vegetables [29]. ...
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Gas chromatography coupled to high resolution time-of-flight mass spectrometry as a high-throughput tool for characterizing geochemical biomarkers in sediments
... of 20 mg of the homogenized and freeze-dried sediment sample was added into a small quartz tube, which is heated up with a pyroprobe using a platinum filament coil. Quartz wool was properly packed at the top and bottom ...
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Biblioteca Digital do IPG: Determination of antipsychotic drugs in hospital and wastewater treatment plant samples by gas chromatography/tandem mass spectrometry
... as gas chromatography (GC) coupled to either nitrogen-phosphorus detector [14,15], mass spectrometric (MS) detection [16] or tan- dem mass spectrometry ...
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Investigation of urinary volatile organic metabolites as potential cancer biomarkers by solid-phase microextraction in combination with gas chromatography-mass spectrometry
... Network gas chromatograph system (Palo Alto, CA, USA), and metabolites were desorbed for 6 min at ...The gas chromatograph was equipped with a 30 m ...inert mass selective ...the MS ...
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A bottom-up approach for data mining in bioaromatization of beers using flow-modulated comprehensive two-dimensional gas chromatography/mass spectrometry
... The steady increase in beer consumption over the past decades demonstrates the notorious importance that the beverage possesses in a global scenario. Therefore, the search for better quality beers is fundamental ...
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An improved, automated whole air sampler and gas chromatography mass spectrometry analysis system for volatile organic compounds in the atmosphere
... Secondary gas standards are exchanged and analyzed with the NOAA Global Monitoring Division (GMD) Halocarbons and other Atmospheric Trace Species (HATS) group on an informal basis every 1 to 2 years to es- tablish ...
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Enantiomeric quantification of psychoactive substances and beta blockers by gas chromatography-mass spectrometry in influents of wastewater treatment plants
... A second procedure adapted from (37) was used. In this procedure, an extraction step was performed, followed by the derivatization with MSTFA 1% TMCS. The last step was a chiral derivatization with (R)-MTPA-Cl. No ...
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Determination of amphetamines-type stimulants in urine samples using microextraction by packed sorbent and gas chromatography-mass spectrometry
... The most predominant challenges in forensic toxicology reside in proofing an abuse of illegal drug or a murder case by poisoning. Further, a forensic toxicologist has to detect drugs that eventually may or may not reduce ...
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Determination of pesticides in water by liquid chromatography-(Electrospray Ionization)-mass spectrometry (LC-ESI-MS). - Portal Embrapa
... by gas chromatography (GC) or high performance liquid chromatography (HPLC) with a variety of detection ...molar mass compounds are unsuitable for gas chromatographic analysis, ...
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Aplication of chemometrics methods in characterization of cigar using matrix solid phase dispersion and gas chromatography-mass spectrometry.
... AND GAS CHROMATOGRAPHY-MASS ...by gas chromatography and identiication by mass spectrometry (GC-MS) and standards, when ...
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Molecularly imprinted solid-phase extraction of urinary trans-trans muconic acid and analysis by gas chromatography-mass spectrometry.
... A cromatografia gasosa com detecção por espectrometria de massas (GC/MS) ou por ionização em chama (GC-FID) e a cro- matografia líquida de alta eficiência com detecção por UV (HPLC- UV) são as ...
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Non-targeted and targeted analysis of wild toxic and edible mushrooms using gas chromatography–ion trap mass spectrometry
... of GC system for thermal ...same GC –MS was used with different operational condi- ...carrier gas was helium C-60 (Gasin, Portugal), at a constant flow of 1 ml min 1 ...
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