PHYSICAL CHEMISTRY. VOL.1+2 (LL)(11TH)
11th Edition
ISBN: 9780198826910
Author: ATKINS
Publisher: Oxford University Press
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Question
Chapter 18, Problem 18C.2AE
Interpretation Introduction
Interpretation:
Gibbs energy for activation at
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Heparin is used as an anti-coagulant. A risk of heparin use is thrombocytopenia, or low platelet
count. This risk is minimized with the use of low molecular weight heparins (LMWH), therefore it is
desirable to separate LMWH from higher molecular weight heparins. The method of choice to do
this is molecular exclusion chromatography. Below is a chromatogram from a molecular exclusion
chromatographic run. Peaks ranging from A to J are clearly distinguishable. The heparin mixture
that was analyzed had anywhere from 6 to 30 repeat units of monomer (where the heparin with 30
repeat units would be roughly five times the size of the heparin with six repeat units).
a. Which letter most likely represents the peak with 6 repeat units given these heparin polymers
were separated with molecular exclusion chromatography?
b. Explain your reasoning describing the mechanism of retention in molecular exclusion
chromatography.
100
80
60
60
Relative Abundance
40
40
E
GH
20
20
B
A
36 38 40 42 44 46 48 50
50…
HELP NOW PLEASE ! URGENT!
HELP NOW PLEASE ! URGENT!
Chapter 18 Solutions
PHYSICAL CHEMISTRY. VOL.1+2 (LL)(11TH)
Ch. 18 - Prob. 18A.1STCh. 18 - Prob. 18C.2STCh. 18 - Prob. 18A.1DQCh. 18 - Prob. 18A.2DQCh. 18 - Prob. 18A.3DQCh. 18 - Prob. 18A.4DQCh. 18 - Prob. 18A.1AECh. 18 - Prob. 18A.1BECh. 18 - Prob. 18A.2AECh. 18 - Prob. 18A.2BE
Ch. 18 - Prob. 18A.3AECh. 18 - Prob. 18A.3BECh. 18 - Prob. 18A.4AECh. 18 - Prob. 18A.4BECh. 18 - Prob. 18A.5AECh. 18 - Prob. 18A.5BECh. 18 - Prob. 18A.6AECh. 18 - Prob. 18A.6BECh. 18 - Prob. 18A.7AECh. 18 - Prob. 18A.7BECh. 18 - Prob. 18A.1PCh. 18 - Prob. 18A.2PCh. 18 - Prob. 18A.3PCh. 18 - Prob. 18A.4PCh. 18 - Prob. 18A.5PCh. 18 - Prob. 18B.1DQCh. 18 - Prob. 18B.2DQCh. 18 - Prob. 18B.1AECh. 18 - Prob. 18B.1BECh. 18 - Prob. 18B.2AECh. 18 - Prob. 18B.2BECh. 18 - Prob. 18B.3AECh. 18 - Prob. 18B.3BECh. 18 - Prob. 18B.4AECh. 18 - Prob. 18B.4BECh. 18 - Prob. 18B.1PCh. 18 - Prob. 18B.3PCh. 18 - Prob. 18B.4PCh. 18 - Prob. 18C.3DQCh. 18 - Prob. 18C.4DQCh. 18 - Prob. 18C.1AECh. 18 - Prob. 18C.1BECh. 18 - Prob. 18C.2AECh. 18 - Prob. 18C.2BECh. 18 - Prob. 18C.3AECh. 18 - Prob. 18C.3BECh. 18 - Prob. 18C.4AECh. 18 - Prob. 18C.4BECh. 18 - Prob. 18C.5AECh. 18 - Prob. 18C.5BECh. 18 - Prob. 18C.6AECh. 18 - Prob. 18C.6BECh. 18 - Prob. 18C.7AECh. 18 - Prob. 18C.7BECh. 18 - Prob. 18C.1PCh. 18 - Prob. 18C.2PCh. 18 - Prob. 18C.6PCh. 18 - Prob. 18C.7PCh. 18 - Prob. 18C.8PCh. 18 - Prob. 18C.10PCh. 18 - Prob. 18D.1DQCh. 18 - Prob. 18D.2DQCh. 18 - Prob. 18D.3DQCh. 18 - Prob. 18D.4DQCh. 18 - Prob. 18D.2AECh. 18 - Prob. 18D.2BECh. 18 - Prob. 18E.2DQCh. 18 - Prob. 18E.3DQCh. 18 - Prob. 18E.3AECh. 18 - Prob. 18E.3BE
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