gas chromatography
Discrimination of n-3 rich oils by gas chromatography
... of chromatography, infra- red absorption, nuclear magnetic resonance and mass spectrometry ...as gas chromatography (GC) has not been explored yet in the discrimination of fish and marine mammal oils ...
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Didactic experiment on gas chromatography: an environmental and analytical approach.
... ON GAS CHROMATOGRAPHY: AN ENVIRONMENTAL AND ANALYTICAL ...of gas chromatography exploring the boiling points and polarities to explain the elution order of a series of alcohols, benzene and ...
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Comparison of the quantification of caffeine in human plasma by gas chromatography and ELISA
... with gas chro- matography and ELISA to determine the precision of the latter method for caffeine ...the gas chromatography method (11), standard caffeine (Sigma Chemical ...
4
Perceptual characterization and analysis of aroma mixtures using gas chromatography recomposition-olfactometry.
... technique, Gas Chromatography Recomposition-Olfactometry (GC-R), that adapts the reconstitution technique used in flavor chemistry studies by extracting volatiles from a sample by headspace solid-phase ...
7
Pesticides residue determination in cattle plasma by gas chromatography-mass spectrometry.
... BY GAS CHROMATOGRAPHY-MASS ...and gas chromatographic determination of pesticides in cattle plasma is ...by gas chromatography-mass ...
4
Quantitative Analysis of Endocrine Disruptors by Comprehensive Two-Dimensional Gas Chromatography
... illicit drugs present in low concentrations in blood samples. GC×GC provides an efficient separation, which enables the use of lower-cost universal detectors, such as FID. The use of FID in one-dimensional gas ...
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Fast Ephedrine Quantification by Gas Chromatography Mass Spectrometry
... liquid chromatography mass spectrometry, mainly because of the dilute-and- shoot ...several gas chromatography based methods have already been described, all of them include cleanup steps, with the ...
8
Matrix effect in pesticide quantification by gas chromatography.
... by gas chromatography when the chromatographic signals of standards prepared in solvents are compared with those of the analyte in extracts of complex ...
9
Application of exclusion chromatography and high resolution gas chromatography to coffee analysis.
... EXCLUSION CHROMATOGRAPHY AND HIGH RESOLUTION GAS CHRO- MATOGRAPHY TO COFFEE ...and gas chromatography (GC) was applied to the analysis of six coffee samples that were previously characterized ...
4
Comparison of quantification methods in gas chromatography: an experiment for chemistry courses.
... COMPARISON OF QUANTIFICATION METHODS IN GAS CHROMATOGRAPHY: AN EXPERIMENT FOR CHEMISTRY COURSES. This article describes an experiment designed to teach quantitative determination in gas ...
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Authenticity control of commercial copaiba oils by high resolution gas chromatography.
... AUTHENTICITY CONTROL OF COMMERCIAL COPAIBA OILS BY HIGH RESOLUTION GAS CHROMATOGRAPHY. Copaiba oil is a resin extracted from the trunk of trees of Copaifera spe- cies which grow in Brazil where it is widely ...
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Determination of plasticizers in drinking water using gas chromatography and mass spectrometry.
... DETERMINATION OF PLASTICIZERS IN DRINKING WATER USING GAS CHROMATOGRAPHY AND MASS SPECTROMETRY. This study investigated the levels of plasticizer endocrine disruptors (diethyl phthalate, dibutyl phthalate, ...
8
Identification of the main components of guazatine fungicide by gas chromatography and gas chromatography-mass spectrometry.
... BY GAS CHROMATOGRAPHY AND GAS CHROMATOGRAPHY-MASS ...through gas chromatography and gas chromatography-mass ...
3
Chiral gas chromatography in the resolution of enantiomers involved in fruit flavours.
... CHIRAL GAS CHROMATOGRAPHY IN THE RESOLUTION OF ENANTIOMERS INVOLVED IN FRUIT ...chiral gas chromatography in resolving optically active stereoisomers and racemates found in fruit ...
10
Compounds by Gas Chromatography-Mass Spectrometry
... by gas chromatography coupled to quadrupole mass spectrometry detector (GC-qMS) on a Shimadzu equipment, model QP5050-A (Kyoto, Japan), using a DB-5 capillary column (60 m length, ...carrier gas at ...
8
State of the art of high temperature high resolution gas chromatography.
... A grande inovação das colunas capilares de alta temperatu- ra, o que permitiu sua utilização eficiente acima de 300 ο C, foi a utilização de polissiloxanas com OH, terminal, nas quais a [r] ...
10
Determination of trihalomethanes and pesticides in water by gas chromatography.
... Para avaliação da eiciência de extração do método proposto, amostras de água supericial foram fortiicadas com os analitos de interesse em concentrações próximas aos LQ ob[r] ...
7
Gas chromatography-mass spectrometry analysis
... The methanol extract of Pseudomonas sp JJTBVK was used in different concentrations (25, 50, 75 and 100 mg/mL) in comparison with the standard drug to study the in vitro[r] ...
8
Quantification of acrylamide in foods selected by using gas chromatography tandem mass spectrometry
... olo , p ečišća a je sa ast o o Ca ez I i II [ ], itd. )a k a tifika iju ak ila ida po oću GC–MS e g. gas h o atog aph – ass spe t o et ili LC–MS-MS e g. Li uid h o atog aph –ta de ass spe t o- et etode eći a ist ...
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