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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Question

Transcribed Image Text:A liquid/liquid extraction is performed
to separate the following drug from a
urine sample: Ibuprofen.
The drug has a pka of 4.43+0.03 and
an n-octanol/water partition coefficient
of 11.7 at pH 7.4.
1. Assume you have a 20nM
concentration of the drug in urine. You
perform a liquid/liquid extraction of
20mL of urine with 10 mL of octanol at
pH 7.4. What is your percent recovery?
2. Would your recovery be higher or
lower at pH 2.0?
3. Explain what steps you would use
to extract the drug by solid phase
extraction.
7:55 PM V
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