Substances A, B, C and D were found to have retention times of 8.3 min (A), 10.6 min (B), 12.4 min (C) and 13.5 min (D), respectively on an 15.0 cm long column. There was also an unretained species which appeared at 1.5 min. The widths of the peak bases were 0.90 min (A), 1.1 min (B), 1.3 min (C) and 0.80 min (D). Given this information listed above, please choose the most appropriate answer for the six questions listed below for the list of possible answers. Part A. Calculate the capacity factor (k') for peak B and peak D. Part B. Calculate the resolution (R) between peaks 8 and D. Part C What do the capacity factor and resolution tell you about the separation of peaks B and D on this column?

Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter1: Introduction
Section: Chapter Questions
Problem 1.9QAP
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Substances A, B, C and D were found to have retention times of 8.3 min
(A), 10.6 min (B), 12.4 min (C) and 13.5 min (D), respectively on an 15.0
cm long column. There was also an unretained species which appeared at
1.5 min. The widths of the peak bases were 0.90 min (A), 1.1 min (B), 1.3
min (C) and 0.80 min (D).
Given this information listed above, please choose the most appropriate
answer for the six questions listed below for the list of possible answers.
Part A Calculate the capacity factor (k') for peak B and peak D.
Part B. Calculate the resolution (R) between peaks B and D.
Part C. What do the capacity factor and resolution tell you about the
separation of peaks B and D on this column?
Part D What are the theoretical plate number (N) for peaks Band D?
Part E. What is the average plate height (H), based on the information in
Part D and the column length listed above?
Part F What would be the required length of a column to achieve a Rs of
2.07
Transcribed Image Text:Substances A, B, C and D were found to have retention times of 8.3 min (A), 10.6 min (B), 12.4 min (C) and 13.5 min (D), respectively on an 15.0 cm long column. There was also an unretained species which appeared at 1.5 min. The widths of the peak bases were 0.90 min (A), 1.1 min (B), 1.3 min (C) and 0.80 min (D). Given this information listed above, please choose the most appropriate answer for the six questions listed below for the list of possible answers. Part A Calculate the capacity factor (k') for peak B and peak D. Part B. Calculate the resolution (R) between peaks B and D. Part C. What do the capacity factor and resolution tell you about the separation of peaks B and D on this column? Part D What are the theoretical plate number (N) for peaks Band D? Part E. What is the average plate height (H), based on the information in Part D and the column length listed above? Part F What would be the required length of a column to achieve a Rs of 2.07
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