Experiment_1__GC_Lab_Report_rduong_duongExperiment1

Experiment_1__GC_Lab_Report_rduong_duongExperiment1 -...

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EXPERIMENT 1: GAS-LIQUID CHROMATOGRAPHY (FORMAL) Introduction ___12__ / 18 pts Procedure: Day 1 and 2 ___5__ / 7 pts Data ___29__ / 35 pts Sample computer chromatograms from both Day 1 and 2. (11 points) Data Table I (8 points) Data Table II (8 points) Data Table III (8 points) Note: On the sample chromatogram the peaks should be identified and the GC temperature, attenuation and flow rate settings should be given. Sample Calculations __18___ / 24 pts Calculation of the partition coefficient from Day 1. (6 points) Calculation of average % ethanol, the standard deviation and % RSD for Day 1: Use of standard calibration plot. (9 points) Calculation of average % ethanol, the standard deviation and % RSD for Day 2: Use of standard addition method (9 points) Results __42___ / 44 pts Calibration plot from Day 1. (10 points) Standard addition plot from Day 2. (10 points) Day 1, the % EtOH from test extraction sample. (8 points) The % alcohol in beverages A, B, and C. (8 points)
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Experimentally determined partition coefficient. (8 points) Discussion __20___ / 28 pts Short discussion of the calibration plot. Short discussion of the standard addition plot. Significance of calculated partition coefficient and how it applies to this experiment. Discussion of the differences between the % alcohol in each of the beverage samples. Problems in experiment. Error analyis. Observations from the experiment. 6 Questions (6 points/question) __28___ / 36 pts Style (organization, spelling, neatness, grammar, etc…) __6___ / 8 pts Other Deductions (i.e., Late Lab Report) - _____ Score ____160___ / 200 pts
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Experiment 1: The Extraction of Ethanol from Alcoholic Beverages and the Analysis of this Extract by Gas-Liquid Chromatography Richard Duong Lab Partner: Britt Mansfield October 14, 2009 Christopher Backlund Chem 241L, Section 420, Chapman Hall 125 The work presented in this report is my own, and the data was obtained by my lab partner and me during the lab period.
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Introduction Firstly, this experiment is a two-part lab where one objective is fulfilled one day, and the other objective is filled during the second day. The first objective on day 1 will be to determine the partition coefficient (K) for ethanol between water and pentanol using standard integration methods. These standard integration methods are created from different standard ethanol solutions that will be analyzed using a gas chromatographer. The partition coefficient will be calculated using gas chromatography because it is a superior method for separation and analysis of volatile, organic compounds that are not apt to change with temperature. The gas chromatograph will create a chromatogram, where data can be manipulated into a standard calibration curve to find unknown concentrations which ultimately will result in the calculation of (K). The gas chromatograph will analyze the different ethanol solutions moving between the mobile gas phase and liquid stationary phase by using a thermal conductivity detector to measure
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Experiment_1__GC_Lab_Report_rduong_duongExperiment1 -...

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