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The figure below shows a portion of a GC chromatogram for a mixture of two aromatic compounds labeled A and B. The separation employed a 2.50 meter packed column under isothermal conditions (90 °C) and a flow rate of 10 mL/min.

The figure below shows a portion of a GC chromatogram for a mixture of two aromatic compounds labeled A and B. The separation employed a 2.50 meter packed column under isothermal conditions (90 °C) and a flow rate of 10 mL/min.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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The figure below shows a portion of a GC chromatogram for a mixture of two aromatic compounds labeled A and B. The separation employed a 2.50 meter packed column under isothermal conditions (90 °C) and a flow rate of 10 mL/min. (a) (b) (c) (d) (e) (f) Detector Signal 300.0 250.0 200.0 150.0 100.0 50.0 0.0 1.0 Unretained 1.2 1.5 time (min) Find the retention times for A and B. Find the times that components A and B spend in the stationary phase. Calculate the retention factors for each peak. Calculate the selectivity factor for the separation of A and B. Find the full widths of each peak. Calculate the resolution of the two peaks.
Transcribed Image Text:The figure below shows a portion of a GC chromatogram for a mixture of two aromatic compounds labeled A and B. The separation employed a 2.50 meter packed column under isothermal conditions (90 °C) and a flow rate of 10 mL/min. (a) (b) (c) (d) (e) (f) Detector Signal 300.0 250.0 200.0 150.0 100.0 50.0 0.0 1.0 Unretained 1.2 1.5 time (min) Find the retention times for A and B. Find the times that components A and B spend in the stationary phase. Calculate the retention factors for each peak. Calculate the selectivity factor for the separation of A and B. Find the full widths of each peak. Calculate the resolution of the two peaks.
Expert Solution
Step 1

To calculate the resolution of 2 peaks from one another.

This is given by the formula:

Resolution of 2 peaks from one another = ∆trwav

∆tr is average retention time of the two peaks

wav is the average full widths of the two peaks

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