a) The figure that follows is an idealized enlargement of the region near the cinnamaldehyde peak. Determine the retention time for cinnamaldehyde. (b) From the figure in part (a), determine the number of theoretical plates for the column.
a) The figure that follows is an idealized enlargement of the region near the cinnamaldehyde peak. Determine the retention time for cinnamaldehyde. (b) From the figure in part (a), determine the number of theoretical plates for the column.
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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(a) The figure that follows is an idealized enlargement of the region near the cinnamaldehyde peak. Determine the retention time for cinnamaldehyde.
(b) From the figure in part (a), determine the number of theoretical plates for the column.
Transcribed Image Text:Challenge Problem: Cinnamaldehyde is the component responsible for cinnamon flavor. It is also a potent
antimicrobial compound present in essential oils (see M. Friedman, N.Kozukue, and L. A. Harden, J.
Agric. Food Chem., 2000, 48, 5702, DOI: 10.1021/
jf000585g). The GC response of an artificial mixture containing six essential oil components and methyl
benzoate as an internal standard is shown in the figure.
100%
Thymol
Eugenol
Essential oil
Methyl benzoate
Carvacrol
components
Carvone
Cinnamaldehyde
Linalool
11:43
18:23
25:03
31:43
38:23
Retention time, min
Chromatogram. (From M. Friedman, N. Kozukue, and L.A.
Harden, J. Agric. Food Chem., 2000, 48, 5702. Copyright 2000
American Chemical Society.)
Chromatogram. (From M. Friedman, N. Kozukue, and L.A. Harden, J. Agric. Food Chem., 2000, 48,
5702. Copyright 2000 American Chemical Society.)
(a) The figure that follows is an idealized enlargement of the region near the cinnamaldehyde peak.
Determine the retention time for cinnamaldehyde.
18 18.2 18.4
18.6
18.8
19 19.2
19.4 19.6
19.8
20
Time, min
Enlarged chromatogram.
(b) From the figure in part (a), determine the number of theoretical plates for the column.
Total ion current, %
Total ion current, %
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