Gas chromatography

The results of Gas Chromatography (GC) with the bulk composition of the oil samples are shown in (Table 3). The gas chromatograms (Fig. 6) show the dominance of long chain n-alkanes (nC13- nC25), with significant abundance of acyclic isoprenoids and cyclo- alkanes (methylcyclohexane and cyclopentanes), such distribution is typical of terrestrial organic matter. In addition, the n-heptane/methylcyclohexane ratio (n-C7/MCH) is used as a source indicator (Thompson, 1987) signifying that the studied

Gas chromatography is a method of separating mixtures of volatile liquids. Like many chromatographic methods there is a mobile phase or gas carrier and a stationary phase. The mobile phase is a gas that carries the components of the mixture through a stationary phase. The stationary phase is a column packed with a low boiling point liquid. Based on what components are present on a mixture the most volatile will be the first one to be detected. The sample in question is injected using a syringe into

Introduction: Using the analytical methods of Gas Chromatography and Mass Spectrometry, in order to determine the composition of a mixture and its individual pure compounds. This is done by analyzing the mixture of compounds using Gas Chromatography and the individual pure compounds by using Mass Spectrometry. Experimental Procedure: Obtain a screw cap and vial which will be ran in the Gas Chromatograph. Fill vial no more than half full of pre prepared unknown compound which is dissolved in either

In the process of obtaining the products of an elimination reaction between 2-Methyl-2-butanol with a strong acid (sulfuric acid), it was necessary to undergo two fundamental techniques of separation and analysis: distillation and gas chromatography. Distillation is one of the oldest biotechnological techniques utilized by human kind. The history of distillation is very closely tied to the history of the production and consumption of alcohol, although, some of the oldest scientific findings on the

Additionally, it is also important to understand how the percentages of each of the compound is determined. It is mainly possible due to the idea that gas chromatography is utilized. That being said, the equation used in the last lab report is again going to be used here because of the fact that the gas chromatography was used again to get the integrals of the graphs (Lab 2). The equation for that is as follows (Lab 2): (Area of Peak 1)/(Area of Peak 1+Area of Peak 2) x 100 Thus, it is important

Further investigate and determine its identity. By utilizing chromatography, a forensic analyst can identify each material and/or chemical that were meshed together to form the sample under investigation. The identification can be determined once the sample is placed in a liquid or when absorbed on a solid surface, and the separation of the molecules becomes either mobile or stationary. This basic analytical technique is beneficial with classifying drugs that has been collected from a crime scene

In gas chromatography, the components of the sample, (which can be called solutes or analytes), separate between two phases – a stationary phase that has a large surface area and a gas phase that permeates through the stationary surface (McNair & Miller, 1998). The technique begins when a few microliters of liquid sample are injected into a port and it becomes vaporized to a gas in the chamber. This starts the mobile phase (also known as the carrier gas). Then, an inert carrier gas is fed into the

report is to discuss about gas chromatography to determine chlorophenols using five differences extraction method that is ; solid phase microextraction, solid phase extraction, liquid phase microextraction, liquid-liquid microextraction, and dispersive liquid-liquid microextraction and choose the best extraction method that are suitable, easy to use, low cost and have more advantages than disadvantages. The separation techniques which collectively are called chromatography are widely been used for

Results When observing the gas chromatography curves, it was evident that there were two pentenes in the unknown mixture, GC_7. This is due to the two peaks on the graph with retention periods (minutes) of 2.802 and 2.883 for the first and second peaks, respectively. The area under the first peak was 36 (m2) and the second was 164 (m2). The compound affiliated with the first peak was 18% of the whole mixture. The compound affiliated with the second peak was 82% of the whole mixture. The

Gas-liquid chromatography (GLC) is a process where an unknown organic sample is dissolved in a solvent then vaporised to separate it into its’ components. This is carried out by using two phases; the stationary phase and the mobile phase. The mobile phase is the gas containing the sample and the stationary phase is a liquid absorbed in a solid support. The liquid can be changed depending on the mixture being tested, so the stationary phase is packed in to a long, thin tube called the column (4college