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GC: Temperature Influence

Last updated

Nov 10, 2020
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- GC-MS: Performance Enhancing Drugs
- Gravimetric Analysis (Fry-Petit)

Contributor
Analytical Sciences Digital Library

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Exercise – Gas Chromatography

Temperature is the most easily controlled factor influencing separation in GC. Consider the isothermal (45 °C) gas chromatogram below.
1. What’s the problem with this separation?
2. Estimate the retention factor (k) for peak #5.
3. How would you change the isothermal temperature conditions to improve the retention factor for peak #5? Draw the resulting chromatogram with peaks labeled.
4. What would be the downside to the change you proposed in part (c)? [Hint: consider what happens to peaks #1-4]

Contributors and Attributions

David Griffith, Willamette University (dgriffit@willamette.edu)
Sourced from the Analytical Sciences Digital Library

Contributors and Attributions

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