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Gas Chromatography: Hydrocarbon Gas Analysis By Ryan Waters November 20, 2006.

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Presentation on theme: "Gas Chromatography: Hydrocarbon Gas Analysis By Ryan Waters November 20, 2006."— Presentation transcript:

1 Gas Chromatography: Hydrocarbon Gas Analysis By Ryan Waters November 20, 2006

2 Presentation Path Equipment Objective of Lab Calibration Chromatographs Unknown Chromatograph Results Conclusions Q&A

3 Equipment

4 Objective Find the composition of an unknown hydrocarbon gas. Knowing some combination of: Methane Ethane Propane Butane

5 Calibration: Methane 0. 42

6 Calibration (cont.): Ethane 2. 73

7 Calibration (cont.): Propane 3. 31

8 Calibration (cont.): Butane 13.05

9 Average Retention Times Methane 0.34 ± 0.22 min. (confidence level 95%) Ethane 2.5 ± 0.62 min. (confidence level 95%) Propane 3.7 ± 1.1 min. (confidence level 95%) Butane 12.3 ± 1.3 min. (confidence level 95%)

10 Unknown Chromatograph Co-elution

11 Results Methane Co-elutes with Air Accurate measurement not possible. Propane 32 ± 21% (confidence level 95%) Butane 56 ± 46% (confidence level 95%)

12 Conclusion/Recommendations Run lower temperatures to eliminate co- eluting. Check baseline. Run unknown more.

13 References Mark Barnes, Gas Chromatography: The Modern Analytical Tool, 207/GasChroma-Fig2.jpg Agilent Technologies, What is Gas Chromatography?, tm

14 Questions


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