Essays Tagged: "Gas chromatography"

Fractional Distillation and Gas Chromatography

CHEM 3152-003Experiment 2: Fractional Distillation and Gas ChromatographyIntroduction:The purpose of this experiment was to separate a mixture of ethyl ace ... tOAc) and toluene by using the method of fractional distillation and to analyze the fractions using gas chromatography (GC).ethyl acetate tolueneDistillation is a method known as separating or purifyi ... on is only one cycle of the vaporization/condensation.Another technique used for this experiment is gas chromatography (GC). GC is the separation of compounds between a stationary and a mobile phase. ...

(8 pages) 103 0 3.5 Jun/2002

Subjects: Science Essays > Chemistry

Lab report on E2 substitution on alkyl halides.

ion of 2-bromobutane yielded 19.1% 1-butene, 69.9% trans-2-butene, and 11.0% cis-2-butene.Backround:Gas Chromatography separates organic samples much in the same way as column chromatography. The only ... mples much in the same way as column chromatography. The only differences are that it uses a moving gas phase and a stationary liquid phase, and that the temperature of the gas system can be controlle ...

(3 pages) 60 0 4.0 Nov/2003

Subjects: Science Essays > Chemistry

Lab report on gas chromatograph and the optical activity of carvones.

243aMatt Judd, Sec. 25Date Performed: 10/29/03Abstract: The objective of this experiment is to use Gas Chromatography to distinguish between two enantiomers of carvone from caraway oil and spearment ... l activity of 0.516 and that spearment oil is 59% carvone and caraway oil is 100% carvone.Backround:Gas Chromatography separates organic samples much in the same way as column chromatography. The only ...

(3 pages) 41 0 4.8 Dec/2003

Subjects: Science Essays > Chemistry

Contents of different liquors

Daniels Whiskey, Smirnoff Vodka, Captain Morgan's Rum, and Glenfiddich Scottish Whiskey. Capillary gas chromatography is a useful technique for measuring such differences in the components of these l ... rceive as flavor.Agilent laboratories investigated the components of whiskey by running a capillary gas chromatograph and detected the presence of thirteen separate compounds in the whiskey. The sampl ...

(4 pages) 48 0 3.7 Dec/2003

Subjects: Science Essays > Chemistry

Esterification - Synthesis of Methyl Benzoate

atory equipment, i.e., nuclear magnetic resonance (NMR), mass spectroscopy (MS), infrared (IR), and gas chromatography (GC) for analysis. These techniques allow the chemist to derive functional groups ...

(5 pages) 18270 0 4.0 Apr/2004

Subjects: Science Essays > Chemistry

Gas Chromatography essay

Gas ChromatographyGas Chromatography is simply the separating of volatile organic compounds. It invo ... nds. It involves a sample being vaporized and injected onto the head of the chromatographic column. Gas chromatography is used to do many things in today's scientific life. It is used in drunk-driving ... ests and is also used in removing important evidence from crime scenes. Here is a model of a simple gas chromatograph.Chromatography in general (meaning gas, liquid and any other type of chromatograph ...

(2 pages) 41 0 5.0 Apr/2004

Subjects: Science Essays

Chemistry Social Relevance: Proposed smoking bans in South Australia.

pletely (equations below) producing between 4,000 to 5,000 chemical compounds in the form of either gases or particles:"Cigarette smoke is constantly changing as the smoke 'ages' - chemicals in the sm ... phur dioxide (SO2), nitrogen dioxide (NO2) and carbon monoxide (CO). Carbon monoxide is a poisonous gas that reduces the amount of oxygen a red blood cell can carry, starving internal organs of oxygen ...

(9 pages) 53 0 4.5 Jul/2004

Subjects: Science Essays > Chemistry

Investigation into the Use of Short-Column Reversed-Phase LC in the Determination of log P Values

ation. Chromatography is the most widely used technique for the analysis of non-inorganic mixtures. Gas chromatography (where the sample must be volatilized) and liquid chromatography (where the sampl ... Chromatography (HPLC) is the method of choice whenever the sample cannot easily be converted to the gas phaseTheoryThe figure above depicts the main components of a modern HPLC system. In HPLC, a solu ...

(6 pages) 17 0 0.0 Jun/2005

Subjects: Science Essays > Chemistry

Investigation into the Use of Short-Column Reversed-Phase LC in the Determination of log P Values 2.

AimTo illustrate how gas chromatography (GC) may be used for the identification and quantification of individual constitu ... entification and quantification of individual constituents of a complex natural product.IntroductionGas chromatography (GC) separates mixtures into their individual components and is particularly usef ... hase of the capillary column as vapours or dissolved in solution. As the column is heated, an inert gas acting as the mobile phase is passed through the column. Each compound in the sample is carried ...

(6 pages) 26 1 4.2 Jun/2005

Subjects: Science Essays > Chemistry

Absorption of Carbon Dioxide

rt of the workProcedure1. Prepare 1 molar NaOH solution for liquid feed. Prepare 2 mol% CO2 gas feed.2. Record base feed conductivity (time = 0)3. Start vapor feed up the colum ... s streams every two minutes.7. Take 1 mL samples of entering and exiting vapor streams. Use gas chromatography to analyze CO2 composition in the entering and exiting vapor streams.8. C ...

(4 pages) 23 0 3.7 Aug/2005

Subjects: Science Essays > Engineering > Chemical Engineering

Bad Breath (Halitosis) Report

with halitosis, are veillonella, actinomyes, streptococcus parasanguinis, camyplobacter concisus, megasphaera, and neisseria. It is likely that the putrefaction of these bacteria creates volatile sulf ... s) that emanate the foul odor that causes bad breath. VSC's in the mouth that were analyzed through gas chromatography were found to consist of CH3SH, H2S, and (CH3)2S.Although it is possible to find ...

(1 pages) 817 0 2.0 Feb/2006

Subjects: Humanities Essays > Health & Medicine > Diseases

A Thorough Description of Chromatography

types of chromatography: Paper Chromatography, Column Chromatography, Thin-Layer Chromatography and Gas ChromatographyDefinitionChromatography (from Greek χρώμα: chroma, color) i ... components of the separated mixture* A chromatograph takes a chemical mixture carried by liquid or gas and separates it into its component parts as a result of differential distributions of the solut ...

(10 pages) 53 0 3.0 Oct/2006

Subjects: Science Essays > Chemistry

Oils and the Human Body

Abstract: The purpose of this lab was to identify an unknown edible oil sample. Gas chromatographic analysis of the fatty acid methyl esters was conducted to find an unknown sample ... was olive oil. Saponification and methylation were methods that were used to prepare the sample for gas chromatography. Gas Chromatography of the olive oil showed peaks at palmitic, palmitoleic, stear ... be and injected with Nitrogen. When the product had dried added 2mL of dichloromethane and added to gas chromatography vial.Results: Fatty Acid Abbreviations Percentage Palmitic ...

(3 pages) 13 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry

Gas Chromatography to determine contents

dependent on the degree, strength, and type of interaction. Hence, the compounds will be separated.Gas chromatography, or gas-liquid chromagraphy which is used in this experiment, consists of two pha ... chromagraphy which is used in this experiment, consists of two phases. The mobile phase is an inert gas (like helium, argon, or nitrogen) and the stationary phase is a liquid (either directly on the w ...

(2 pages) 443 0 3.7 Nov/2008

Subjects: Science Essays > Chemistry

Distillation of Mixtures Formal Report

t is split up into three parts: separating cyclohexane and toluene through distillation, performing gas chromatography on the substances that were distilled, and separating a salt-water mixture throug ... the system. Once enough energy has been added, a molecule can change its conformation (liquid to a gas). Once a molecule changes from the liquid phase to the vapor phase, the vapor exerts a pressure ...

(8 pages) 13 0 0.0 Apr/2009

Subjects: Science Essays > Chemistry

A Friedel-Crafts Alkyla

tion and combines with the chloride ion of the n-propyl chloride to form the Friedel-Crafts complex.Gas chromatography will be used to decide the quantitative product distribution of the resulting com ... e, should be displayed. Finally the percent composition of each product should be determined by the gas chromatography results. It is expected that the 1,4-Dimethyl-2-isopropylbenzene will be formed a ...

(5 pages) 3765 0 0.0 Oct/2009

Subjects: Science Essays > Chemistry

Organic lab 3

product. (BP 41 C, 56 C, and 73 C)Once the acid catalyzed reaction is carried out, the technique of gas chromatography will be used to analyze the products that were formed. The specific gas chromatog ... etector. This method is able to analyze the compounds without decomposition. Using an inert carrier gas the products are then vaporized and go through the machine at a specific rate of time, which wil ...

(3 pages) 2 0 0.0 Dec/2014

Subjects: Science Essays > Chemistry