Gas chromatography-mass spectrometry (GC-MS) analysis
An improved, automated whole air sampler and gas chromatography mass spectrometry analysis system for volatile organic compounds in the atmosphere
... Sample analysis and description of GC-MS Conceptually, ACCBAR is a series of traps used to re- duce unwanted component(s) from the air sample matrix ...via mass spectrometry on a 20 min ...quadrupole ...
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Gas chromatography-mass spectrometry analysis
... 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 antibacterial ...
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J. Braz. Chem. Soc. vol.22 número8
... Due to the lack of literature reports concerning the use of MSPD as an extraction technique for pesticides belonging to different chemical classes from medicinal plants (different plants and herbs exhibit different ...
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Homogenity of oil and sugar components of flour amaranth investigated by GC-MS
... Gas chromatography with mass spectrometry (GC-MS) was used for per- forming a qualitative analysis of liposoluble and hydrosoluble flour extracts of three genotypes of Amaranthus ...the ...
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J. Braz. Chem. Soc. vol.20 número3
... by gas chromatography–mass spectrometry (GC-MS) analysis of the products from the limonene (1-methyl-4-prop-1- en-2-yl-cyclohexene) disproportionation obtained from the catalytic ...
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Determination of Pesticide Residues in Banana by Using High Performance Liquid Chromatography and Gas Chromatography-Mass Spectrometry
... Abstract: Problem statement: The occurrence of endosulfan, carbendazim, chloropyripos in 10 banana samples in southern area of Tamilnadu, India (hill banana, karpuravalli, monthan, nendran, ney poovan, pachanadan, ...
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J. Braz. Chem. Soc. vol.14 número3
... resolution gas chromatography-olfactometry-mass spectrometry and aroma extract dilution analysis identified the most potent substances in its aroma as ethyl butanoate (fruity, sweet), ...
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The role of miniaturized systems in analytical toxicology: new psychoactive substances
... In recent years new psychoactive substances (NPS) have emerged, sold via the Internet as licit drugs of abuse. These compounds, also called "legal highs", are designed as substitutes for illegal drugs, causing ...
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Development of headspace solid-phase microextraction-gas chromatography–mass spectrometry methodology for analysis of terpenoids in Madeira wines
... The purpose of this study was to develop and optimise an HS-SPME procedure for the determination of trace levels of terpenoid compounds—linalool, ␣-terpineol, citronellol, nerol, geraniol, nerylacetone, nerolidol, ...
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Gas Chromatography-mass Spectrometry (GC-MS) analysis of alkaloids isolated from Epipremnum aureum (Linden and Andre) Bunting
... by Gas Chromatography- Mass ...carrier gas helium was ...the mass spectral data with those of authentic compounds and with data obtained from the ...
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Analysis of organochlorine pesticides in water using headspace solid phase microextraction with gas chromatography and mass spectrometry.
... WITH GAS CHROMATOGRAPHY AND MASS ...with gas chromatography - mass spectrometry was validated for the quantitative determination of 18 organochlorine pesticides in ...
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A method for analysis of vanillic acid in polar ice cores
... and gas chromatography–mass spectrometry (GC-MS), similar to techniques used for the analysis of biomass burning aerosols (Nolte et ...involves analysis of relatively large ice ...
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Fast Ephedrine Quantification by Gas Chromatography Mass Spectrometry
... pseudoephedrine analysis, N-TFA-O-TMS derivative is more indicated in order to avoid creatinine ...multivariate analysis regarding the injection condition was evaluated in order to improve the robustness ...
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3 ∗ 1 Laboratório de Produtos Naturais, PN3, Far-Manguinhos, FIOCRUZ Rua Sizenando Nabuco, 100, 21041-250 Rio de Janeiro, RJ, Brasil
... by Gas Chromatography and Gas Chromatography/Mass Spectrometry of the essential oils obtained from leaves of Echinodorus grandiflorus (“Chapéu de couro”) from two different ...
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Development and validation of a methodology FOR analysis of biodiesel: diesel blends using gas chromatography-mass spectrometry.
... FOR ANALYSIS OF BIODIESEL: DIESEL BLENDS USING GAS CHROMATOGRAPHY-MASS ...of analysis of biodiesel:diesel blends using HRGC-MS in SIM ...
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J. Braz. Chem. Soc. vol.27 número3
... resolution mass spectrometry (HRMS) using atmospheric pressure chemical ionization (HRAPCIMS) was performed on a liquid chromatography-mass spectrometry ion trap and time-of-flight ...
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Molecularly imprinted solid-phase extraction of urinary trans-trans muconic acid and analysis by gas chromatography-mass spectrometry.
... Ademais, o método proposto, além de mostrar-se adequado para a determinação de AttM urinário para fins de biomonitorização da exposição ocupacional a baixos níveis de benzeno, apresen[r] ...
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J. Braz. Chem. Soc. vol.28 número5
... others. Mass spectrometry (MS) studies based on capillary gas chromatography (CGC), paper spray (PS), and leaf spray (LS) ionization were carried out for alkaloid investigation of the native ...
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J. Braz. Chem. Soc. vol.24 número5
... of gas chromatography-mass spectrometry and solid-phase microextraction for quantification of thymol and carvacrol in plasma and milk of dairy ...for analysis of this compound in plasma ...
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J. Braz. Chem. Soc. vol.11 número5
... resolution gas chro- matography - flame ionisation detector), for the quanti- fication of lupanine, multiflorine and a spartein-like al- ...resolution gas chromatography coupled with mass ...
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