1) The efficiency of a GC separation of 2-butanone on a dinonyl phthalate packed column was studied. Evaluating plate height as a function of flow rate gave a van Deemter equation for which A is 1.65 mm, B is 25.8 mm•mL min–1, and C is 0.0236 mm•min mL–1. a) Prepare a graph of H versus u for flow rates between 5 –120 mL/min. b)For what range of flow rates does each term in the Van Deemter equation have the greatest effect? c)What is the optimum flow rate and the corresponding height of a theoretical plate?
1) The efficiency of a GC separation of 2-butanone on a dinonyl phthalate packed column was studied. Evaluating plate height as a function of flow rate gave a van Deemter equation for which A is 1.65 mm, B is 25.8 mm•mL min–1, and C is 0.0236 mm•min mL–1. a) Prepare a graph of H versus u for flow rates between 5 –120 mL/min. b)For what range of flow rates does each term in the Van Deemter equation have the greatest effect? c)What is the optimum flow rate and the corresponding height of a theoretical plate?
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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1) The efficiency of a GC separation of 2-butanone on a dinonyl phthalate packed column was studied. Evaluating plate height as a function of flow rate gave a van Deemter equation for which A is 1.65 mm, B is 25.8 mm•mL min–1, and C is 0.0236 mm•min mL–1.
a) Prepare a graph of H versus u for flow rates between 5 –120 mL/min.
b)For what range of flow rates does each term in the Van Deemter equation have the greatest effect?
c)What is the optimum flow rate and the corresponding height of a theoretical plate?
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