Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Question
Chapter 28, Problem 28.5QAP
Interpretation Introduction
Interpretation:
Whether it is desirable to increase or decrease the proportion of hexane as the column in eluted while preparing a hexane-acetone gradient for an alumina HPLC column.
Concept introduction:
High-performance liquid chromatography (HPLC) is a column chromatography, which is used to separate the components of the dissolved solution. The alumina is a stationary phase of the liquid which is found in packed tubes.
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13C NMR is good for:
a) determining the molecular weight of
the compound
b) identifying certain functional groups.
c) determining the carbon skeleton, for
example methyl vs ethyl vs propyl groups
d) determining how many different kinds
of carbon are in the molecule
6
D
2. (1 pt) Limonene can be isolated by performing steam distillation of orange peel.
Could you have performed this experiment using hexane instead of water? Explain.
3. (2 pts) Using GCMS results, analyze and discuss the purity of the Limonene obtained
from the steam distillation of orange peel.
Part III. Arrange the following carbons (in blue) in order of increasing chemical shift.
HO
B
NH 2
A
CI
Chapter 28 Solutions
Principles of Instrumental Analysis
Ch. 28 - Prob. 28.1QAPCh. 28 - Prob. 28.2QAPCh. 28 - Prob. 28.3QAPCh. 28 - How can the selectivity factor be manipulated in...Ch. 28 - Prob. 28.5QAPCh. 28 - Prob. 28.6QAPCh. 28 - Prob. 28.7QAPCh. 28 - Prob. 28.8QAPCh. 28 - Prob. 28.9QAPCh. 28 - Prob. 28.10QAP
Ch. 28 - Prob. 28.11QAPCh. 28 - Prob. 28.12QAPCh. 28 - Prob. 28.13QAPCh. 28 - Prob. 28.14QAPCh. 28 - Prob. 28.15QAPCh. 28 - Prob. 28.16QAPCh. 28 - Mass spectrometry is an extremely versatile...Ch. 28 - Prob. 28.18QAPCh. 28 - Prob. 28.19QAPCh. 28 - Two components in an HPLC separation have...Ch. 28 - Prob. 28.21QAPCh. 28 - Prob. 28.22QAPCh. 28 - Prob. 28.23QAP
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